Inductive charging method for vehicles

• US 8,860,365 B2
• Filed: 10/18/2011
• Issued: 10/14/2014
• 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
• Primary Examiner(s): Dunn, Drew A
• Assistant Examiner(s): Cole, Eric
• Application Number:
  US13/276,131
• Publication Number:
  US 20130038277A1
• Time in Patent Office: 1,092 Days
• Field of Search: 191/10, 180/65.01, 320/107, 320/110, 320/111, 320/113
• 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

An inductive charging method for vehicles includes a power sourcing (PS) device using a first frequency converter PS sub-module to detect a power receiving (PR) device. The PS microprocessor can compare ID codes of the PR device and check power receiving status data codes. When finding an incorrect power supply, the PS microprocessor will mark it and make other first frequency converter PS sub-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 sub-modules that are connected in parallel inside a frequency converter PS module;

each of the first frequency converter PS sub-modules includes a PS microprocessor that is electrically connected with a PS driving unit, a signal analysis circuit capable of detecting and analyzing coil data signals, a coil voltage detection circuit capable of detecting voltage of a 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 sub-modules is electrically connected with a signal control circuit via the PS microprocessor to control over power supply from the first frequency converter PS sub-modules and is connected in parallel with a power source by using the PS unit and PS driving unit;

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

the inductive charging method for vehicles comprises;

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

(A02) the PS device detects if there is any PR device in an induction range by using the first frequency converter PS sub-module that corresponds to the first PR sub-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) the PS microprocessor of the first frequency converter PS sub-module corresponding to the first PR sub-module checks an ID code of the PR device and decides if it is on a list of authorized power receivers;

if yes, proceed to step (A04);

otherwise, proceed to step (A08);

(A04) the PS microprocessor of the first frequency converter PS sub-module corresponding to the first PR sub-module decides if the PR device is in a 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 system status of the PR device as incorrect in the PS microprocessor of the first frequency converter PS sub-module corresponding to the first PR sub-module;

(A06) deliver the incorrect system status in the PS microprocessor of the first frequency converter PS sub-module via the signal control circuit to the PS microprocessors of other first frequency converter PS sub-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 sub-modules and decide if other first frequency converter PS sub-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 sub-modules and proceed to step (A01);

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

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

if the currently received power is smaller than the preset power, proceed to step (A11);

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

(A10) increase working frequency of output that should be adjusted from the corresponding PS microprocessor to the PS driving unit to reduce 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) the PS microprocessors check if output power of the corresponding first frequency converter PS sub-modules has reached a preset upper limit;

if yes, proceed to step (A13);

otherwise, proceed to step (A14);

(A13) the PS microprocessors of other first frequency converter PS sub-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) the 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 are connected in parallel with the power source.

3. The inductive charging method for vehicles according to claim 1, wherein the first and second PR sub-modules of the PR device are respectively equipped with a PR microprocessor, which is connected with a voltage detection circuit capable of detecting 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 resonance circuit, so that the resonance circuits are electrically connected with PR coils that are arranged in alignment with the PS coils of the first frequency converter PS sub-modules for inductive signal transmission;

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

the first and second PR sub-modules are connected in series 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 sub-modules are connected in series between the first and second PR sub-modules of the PR device, and components in the third PR sub-module are the same as those in the first and second PR sub-modules;

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

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

the first and second PR sub-modules are equipped with a PR microprocessor respectively, and the PR microprocessors are connected with a voltage detection circuit capable of detecting voltage of a 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 to a resonance circuit, so that the resonance circuits are electrically connected with PR coils that are arranged in alignment with PS coils of the first frequency converter PS sub-modules for inductive signal transmission;

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

the first and second PR sub-modules are connected in series to produce the total voltage and compare in by using the PR microprocessor;

the inductive charging method for vehicles comprises;

(B01) the first PR sub-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 sub-module in the PS device;

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

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

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

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

if yes, proceed to step (B06);

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

(B06) the first and second PR sub-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 sub-modules of the PS device includes a PS microprocessor that is electrically connected with a PS driving unit, a signal analysis circuit capable of detecting and analyzing coil data signals, a coil voltage detection circuit capable of detecting 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 sub-modules is electrically connected with a signal control circuit via a PS microprocessor to control over power supply from the first frequency converter PS sub-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 sub-modules that are connected in parallel, and in the PR module of the PR device, one or more third PR sub-modules are installed in series between the first and second PR sub-modules, and components inside the third PR sub-modules are the same as those in the first and second PR sub-modules;

the first, second and third PR sub-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 sub-modules.