INDUCTIVE CHARGING METHOD FOR VEHICLES

• US 20130038277A1
• Filed: 10/18/2011
• Published: 02/14/2013
• Est. Priority Date: 08/12/2011
• Status: Active Grant

• Current Assignee: Fu Da Tong Technology Co., Ltd.
• Original Assignee: Fu Da Tong Technology Co., Ltd.
• Inventors: Chan, Chi-Che, TSAI, Ming-Chiu
• Granted Patent: US 8,860,365 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

The present invention relates to an inductive charging method for vehicles, in which the PS device uses a first frequency converter PS module to detect the PR device. The PS microprocessor can compare ID codes of the PR device and check power receiving status data codes. When finding incorrect power supply, the PS microprocessor will mark it and make other first frequency converter PS modules to cut off power supply through the signal control circuit, and even adjust output power based on power status data codes from the PR device. As total voltage of the PR module is increased by series connection, it is not necessary to use components of high-voltage specifications and water cannot go into sockets, thus preventing electricity leakage. Besides, no wired connection is required and operations concerning identification, stored value or deductions can be carried out.

Claims

1. An inductive charging method for vehicles, comprising a power sourcing (PS) device and a power receiving (PR) device, wherein the PS device includes first frequency converter PS modules that are connected in parallel inside a frequency converter PS module;

each of the first frequency converter PS modules includes a PS microprocessor that is electrically connected with a PS driving unit capable of driving the PS module to work, a signal analysis circuit capable of detecting and analyzing coil data signals, a coil voltage detection circuit capable of detecting the voltage of the PS coil and a PS unit to supply electric power respectively;

the PS driving unit is electrically connected with a resonance circuit, which, together with the coil voltage detection circuit and signal analysis circuit, is further linked with a PS coil capable of transmitting electric power and data signals outwards;

each of the first frequency converter PS modules is electrically connected in series with a signal control circuit via the PS microprocessor to control over power supply from the first frequency converter PS modules and is connected in parallel with the power source by using the PS unit and PS driving unit;

the PR device includes a first PR module and a second PR module that are connected in series in its PR module;

operation of the PS device comprises the following steps;

(A01) PS device standby, switch off power output from first frequency converter PS modules and eliminate system status markings in the PS microprocessor;

(A02) PS device detects if there is any PR device in the induction range by using the first frequency converter PS module that corresponds to the first PR module of the PR device;

proceed to step (A03) if a startup code is received from the PR device;

otherwise, proceed to step (A01);

(A03) PS microprocessor of the first frequency converter PS module corresponding to the first PR module checks the ID code of the PR device and decides if it is on the list of authorized power receivers;

if yes, proceed to step (A04);

otherwise, proceed to step (A08);

(A04) PS microprocessor of the first frequency converter PS module corresponding to the first PR module decides if the PR device is in the state of normal power supply by checking its power receiving status data code;

if yes, proceed to step (A07);

otherwise, proceed to step (A05);

(A05) mark the system status of the PR device as incorrect in the PS microprocessor of the first frequency converter PS module corresponding to the first PR module;

(A06) deliver the incorrect system status in the PS microprocessor of the first frequency converter PS module via the signal control circuit to the PS microprocessors of other first frequency converter PS modules for handling;

(A07) check other system status markings delivered by the signal control circuit in the PS microprocessors of other first frequency converter PS modules and decide if other first frequency converter PS modules supply power normally;

if yes, proceed to step (A09);

otherwise, proceed to step (A08);

(A08) cut off power output from the first frequency converter PS modules and proceed to step (A01);

(A09) PS microprocessors of the first frequency converter PS modules check the power currently received by using power status data codes from the PR device and compare it with the preset power;

if the currently received power is larger than the preset power, proceed to step (A10);

if it equals the preset power, proceed step (A12);

(A10) increase the working frequency of the output that should be adjusted from the corresponding PS microprocessor to the PS driving unit to reduce the output frequency through frequency conversion, and then proceed to step (A12);

(A11) reduce the working frequency of the output that should be adjusted from the corresponding PS microprocessor to the PS driving unit to increase the output frequency through frequency conversion;

(A12) PS microprocessors check if output power of the corresponding first frequency converter PS modules has reached the preset upper limit, if yes, proceed to step (A13);

otherwise, proceed to step (A14);

(A13) PS microprocessors of other first frequency converter PS modules mark the system status of the PS device as incorrect if the output power has reached the preset upper limit, and then proceed to step (A06);

(A14) PS microprocessors continue to supply electricity and proceed to step (A03).

2. The inductive charging method for vehicles according to claim 1, wherein the PS driving units of the frequency converter PS modules of the PS device are electrically connected with the PS microprocessor, resonance circuit and PS unit, and the signal analysis circuit and coil voltage detection circuit are connected in parallel with the resonance circuit, and the PS unit and PS driving unit is connected in parallel with the power source.

3. The inductive charging method for vehicles according to claim 1, wherein the first and second PR modules of the PR device are respectively equipped with a PR microprocessor, which is connected with a voltage detection circuit capable of detecting the voltage of the power source, an AM carrier modulation circuit capable of coding data signals, a breaker protection circuit for control over switching in operation and a voltage stabilizing circuit and a DC step-down transformer to stabilize the voltage of the power source;

the breaker protection circuit is electrically connected with the PR microprocessor and voltage stabilizing circuit, while the voltage detection circuit, breaker protection circuit and DC step-down transformer are electrically connected with a rectifier filter circuit used for filtering and rectifying power signals respectively;

then, the rectifier filter circuit and AM carrier modulation circuit are electrically connected with the resonance circuit, so that the resonance circuits are electrically connected with the PR coils that are arranged in alignment with the PS coils of the PS modules for inductive signal transmission;

the second PR module is electrically connected with the voltage stabilizing circuit to the PR output terminal, and the voltage stabilizing circuit is connected in series with a bleeder circuit to shunt the total voltage and then is electrically connected with the PR microprocessor of the first PR module;

the first and second PR modules are connected in series with the voltage stabilizing circuit to produce the total voltage and compare in by using the PR microprocessor.

4. The inductive charging method for vehicles according to claim 3, wherein one or more third PR modules are connected in series between the first and second PR modules of the PR device, and the components in the third PR module are the same as those in the first and second PR modules;

the first, second and third PR modules are connected in series with the voltage stabilizing circuit.

5. An inductive charging method for vehicles, comprising a PS device and a PR device, wherein the PS device includes a frequency converter PS module with two first frequency converter PS modules connected in parallel, and the PR device includes a PR module in which a first PR module and a second PR module are installed in series;

the first and second PR modules are equipped with a PR microprocessor respectively, and the PR microprocessors are connected with a voltage detection circuit capable of detecting the voltage of the power source, an AM carrier modulation circuit capable of coding data signals, a breaker protection circuit for control over switching in operation and a voltage stabilizing circuit and a DC step-down transformer to stabilize the voltage of the power source;

the breaker protection circuit is electrically connected with the PR microprocessor and voltage stabilizing circuit, while the voltage detection circuit, breaker protection circuit and DC step-down transformer are electrically connected with a rectifier filter circuit used for filtering and rectifying power signals respectively;

then, the rectifier filter circuit and AM carrier modulation circuit are electrically connected a the resonance circuit, so that the resonance circuits are electrically connected with the PR coils that are arranged in alignment with the PS coils of the PS modules for inductive signal transmission;

the second PR module is electrically connected with the voltage stabilizing circuit to the PR output terminal, and the voltage stabilizing circuit is connected in series with a bleeder circuit to shunt the total voltage and then is electrically connected with the PR microprocessor of the first PR module;

the first and second PR modules are connected in series with the voltage stabilizing circuit to produce the total voltage and compare in by using the PR microprocessor;

operation of the PR device comprises the following steps;

(B01) first PR module of the PR device receives a detection signal from the PS device and feeds back a startup code to the corresponding first frequency converter PS module in the PS device;

(B02) aforesaid first PR module transmits an identification code to the corresponding first frequency converter PS module in the PS device;

(B03) aforesaid first PR module sends a power supply status data code to the corresponding first frequency converter PS module in the PS device;

(B04) first, second and third PR modules send data codes of the received power status to the corresponding first frequency converter PS modules of the PS device;

(B05) first PR module checks if the voltage of the PR output terminal is equal to the preset voltage by using the bleeder circuit;

if yes, proceed to step (B06);

otherwise, mark the incorrect status and proceed to step (B03);

(B06) first and second PR modules of the PR device continue to receive electric power and proceed to step (B02).

6. The inductive charging method for vehicles according to claim 5, wherein each of the first frequency converter PS modules of the PS device includes a PS microprocessor that is electrically connected with a PS driving unit capable of driving the PS module to work, a signal analysis circuit capable of detecting and analyzing coil data signals, a coil voltage detection circuit capable of detecting the voltage of the PS coil and a PS unit to supply electric power respectively;

the PS driving unit is electrically connected with a resonance circuit, which, together with the coil voltage detection circuit and signal analysis circuit, is further linked with a PS coil capable of transmitting electric power and data signals outwards;

each of the first frequency converter PS modules is electrically connected in series with a signal control circuit via a PS microprocessor to control over power supply from the first frequency converter PS modules and is connected in parallel with the power source by using the PS unit and PS driving unit.

7. The inductive charging method for vehicles according to claim 5, wherein the frequency converter PS module can be further supplemented by three or more first frequency converter PS modules that are connected in parallel, and in the PR module of the PR device, one or more third PR modules are installed in series between the first and second PR modules, and the components inside the third PR modules are the same as those in the first and second PR modules;

the first, second and third PR modules are connected in series with the voltage stabilizing circuit, and in step (C06), the PR device continues to receive electric power by using the first, second and third PR modules.