Carrier communication method and system based on charging-discharging of electric vehicle and carrier device

• US 9,604,545 B2
• Filed: 12/31/2012
• Issued: 03/28/2017
• Est. Priority Date: 12/31/2011
• Status: Active Grant

• Current Assignee: BYD Company Limited
• Original Assignee: BYD Company Limited, Shenzhen BYD Auto R&D Company Limited
• Inventors: Ma, Xianhong, Wang, Weiqun
• Primary Examiner(s): Lugo, David B.
• Application Number:
  US14/369,923
• Publication Number:
  US 20140369431A1
• Time in Patent Office: 1,548 Days
• US Class Current: 1/1
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 1/006 to power outlets
• CPC Class Codes: B60L 2210/12 Buck converters
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2210/42 Voltage source inverters
• CPC Class Codes: B60L 2240/527 Voltage
• CPC Class Codes: B60L 2240/529 Current
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/12 by confirmation, e.g. of the input
• CPC Class Codes: B60L 2260/22 Standstill, e.g. zero speed
• CPC Class Codes: B60L 2260/26 Transition between different drive modes
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 2270/20 Inrush current reduction, i.e. avoiding high currents when connecting the battery
• CPC Class Codes: B60L 3/003 relating to inverters
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 50/51 : characterised by AC-motors
• CPC Class Codes: B60L 50/52 : characterised by DC-motors
• CPC Class Codes: B60L 50/60 : using power supplied by batteries in combination with fuel cells B60L50/75
• CPC Class Codes: B60L 53/11 : DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/14 : Conductive energy transfer
• CPC Class Codes: B60L 53/16 : Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/18 : Cables specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/20 : characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/22 : Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/24 : Using the vehicle's propulsion converter for charging
• CPC Class Codes: B60L 53/60 : Monitoring or controlling charging stations
• CPC Class Codes: B60L 55/00 : Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: B60L 58/10 : for monitoring or controlling batteries
• CPC Class Codes: B60L 58/12 : responding to state of charge [SoC]
• CPC Class Codes: B60L 58/25 : by controlling the electric load
• CPC Class Codes: H02J 2207/20 : Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 2207/40 : adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 2310/48 : for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 3/322 : the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
• CPC Class Codes: H02J 5/00 : Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02J 7/0036 : using connection detecting circuits H02J7/0034 takes precedence
• CPC Class Codes: H02J 7/0063 : with circuits adapted for supplying loads from the battery
• CPC Class Codes: H02J 7/0068 : Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/007182 : in response to battery voltage
• CPC Class Codes: H02J 7/007194 : of the battery
• CPC Class Codes: H02J 7/02 : for charging batteries from ac mains by converters
• CPC Class Codes: H02J 7/342 : The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• CPC Class Codes: H02J 7/345 : using capacitors as storage or buffering devices
• CPC Class Codes: H04B 3/542 : the information being in digital form
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 10/92 : Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• 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 10/126 : the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
• CPC Class Codes: Y04S 30/12 : Remote or cooperative charging
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A carrier communication method and system based on charging-discharging of an electric vehicle and a carrier device are disclosed. The carrier communication method comprises: determining whether a carrier signal from a peripheral apparatus is detected at an interface harness and if yes, determining whether the carrier signal is correct, when the electric vehicle is powered on to start; when the electric vehicle detects the carrier signal and the carrier signal is correct, receiving the carrier signal via the interface harness; and performing a coupling and filtering on the carrier signal to convert the carrier signal into a standard carrier signal and demodulating the standard carrier signal into a digital signal to obtain information about the peripheral apparatus.

Claims

1. A carrier communication method based on charging-discharging of an electric vehicle, comprising:

S1;

determining whether a carrier signal from a peripheral apparatus is detected at an interface harness and if yes, determining whether the carrier signal is correct, after the electric vehicle is powered on;

S2;

receiving the carrier signal via the interface harness, when the electric vehicle detects the carrier signal and the carrier signal is correct;

S3;

performing a coupling and a filtering on the carrier signal by the electric vehicle to convert the carrier signal into a standard carrier signal and demodulating the standard carrier signal into a digital signal to obtain information about the peripheral apparatus,

wherein the method further comprises;

setting a Serial Communication Interface (SCI) of the electric vehicle in an interrupt state when receiving the carrier signal via the interface harness; and

wherein at step S1, when the carrier signal is not detected at the interface harness within a predetermined initial time, it is further determined whether the carrier signal is detected at the SCI of the electric vehicle; and

if yes, execute step S2.

2. The carrier communication method according to claim 1, wherein determining whether the carrier signal is correct comprises:

detecting a plurality of parameters of the carrier signal and comparing each of the plurality of parameters with a corresponding standard value respectively so as to determine whether the carrier signal is correct, in which the plurality of parameters comprise one or more of a duty ratio of the carrier signal, an amplitude of the carrier signal, a number of data items in the carrier signal and a number of times of sending a same data item.

3. The carrier communication method according claim 1, wherein at step S1, when the carrier signal is detected neither at the interface harness nor at the SCI within the predetermined initial time, it is re-determined whether the carrier signal is detected at the interface harness.

4. The carrier communication method according to claim 1, wherein the carrier signal is obtained by modulating the information about the peripheral apparatus into an analog signal with the peripheral apparatus and coupling an amplified analog signal to the interface harness after performing a power amplification on the analog signal.

5. The carrier communication method according to claim 1, further comprising:

with the electric vehicle, modulating vehicle information into an analog signal, performing a power amplification on the analog signal and coupling a power amplified analog signal to the interface harness of the electric vehicle to generate a carrier signal;

determining, with the peripheral apparatus, whether the carrier signal from the electric vehicle is detected at the interface harness of the electric vehicle and if yes, determining whether the carrier signal is correct;

receiving the carrier signal via the interface harness when the peripheral apparatus detects the carrier signal and the carrier signal is correct; and

with the peripheral apparatus, performing a coupling and a filtering on the carrier signal to convert the carrier signal into a standard carrier signal and demodulating the standard carrier signal into a digital signal to obtain the vehicle information.

6. A carrier communication system based on charging-discharging of an electric vehicle, comprising:

a peripheral apparatus comprising a first carrier device, wherein the first carrier device comprises a first processor and a first memory storing instructions executable by the first processor, and the first processor is configured to execute the instructions stored in the first memory so as to receive data sent from a control module of the peripheral apparatus, to modulate the data into an analog signal, and to couple an amplified analog signal onto an interface harness of the peripheral apparatus after performing a power amplification on the analog signal, such that a carrier signal is generated;

an electric vehicle comprising a second carrier device, wherein the second carrier device comprises a second processor and a second memory storing instructions executable by the second processor, and the second processor is configured to execute the instructions stored in the second memory so as to determine whether the carrier signal sent from the peripheral apparatus is detected at the interface harness and whether the carrier signal is correct when the electric vehicle is powered on, to receive the carrier signal via the interface harness when the carrier signal is detected and the carrier signal is correct, to perform a coupling and a filtering on the carrier signal to convert the carrier signal into a standard carrier signal and to demodulate the standard carrier signal into a digital signal to obtain information about the peripheral apparatus,

wherein the second processor is further configured to set a Serial Communication Interface (SCI) of the electric vehicle in an interrupt state when the carrier signal is received via the interface harness; and

wherein the second processor is further configured to determine whether the carrier signal is detected at the SCI when the carrier signal is not detected at the interface harness within a predetermined initial time.

7. The carrier communication system according to claim 6, wherein the second processor is further configured to detect a plurality of parameters of the carrier signal and to compare each of the plurality of parameters with a corresponding standard value respectively so as to determine whether the carrier signal is correct, in which the plurality of parameters comprise one or more of a duty ratio of the carrier signal, an amplitude of the carrier signal, a number of data items in the carrier signal and a number of times of sending a same data item.

8. The carrier communication system according to claim 6, wherein the second processor is further configured to re-determine whether the carrier signal is detected at the interface harness when the carrier signal is detected neither at the interface harness nor at the SCI within the predetermined initial time.

9. A carrier device, disposed in an electric vehicle and comprising:

a Serial Communication Interface (SCI) connected with a peripheral apparatus;

a processor, wherein the carrier processor communicates with the peripheral device via the SCI; and

a memory storing instructions executable by the processor,

wherein the processor is configured to;

receive information from the peripheral apparatus via the SCI;

modulate the information into an analog signal and perform a power amplification on the analog signal; and

couple a power amplified analog signal to an interface harness of the peripheral apparatus,

wherein the processor further communicates with the peripheral apparatus via the interface harness of the peripheral apparatus, and the processor is further configured to;

determine whether a carrier signal from the peripheral apparatus is detected at the interface harness and whether the carrier signal is correct,

receive the carrier signal via the interface harness when the carrier signal is detected at the interface harness and the carrier signal is correct,

perform a multilevel filtering on the carrier signal to convert the carrier signal into a standard carrier signal,

demodulate the standard carrier signal into a digital signal and analyze the digital signal to obtain information about the peripheral apparatus;

wherein the processor is configured to set the SCI in an interrupt state when receiving the carrier signal via the interface harness; and

wherein the processor is further configured to determine whether the carrier signal is detected at the SCI when the carrier signal is not received via the interface harness within a predetermined initial time.

10. The carrier device according to claim 9, wherein the processor is configured to detect a plurality of parameters of the carrier signal and to compare each of the plurality of parameters with a corresponding standard value respectively so as to determine whether the carrier signal is correct, in which the plurality of parameters comprise one or more of a duty ratio of the carrier signal, an amplitude of the carrier signal, a number of data items in the carrier signal and a number of times of sending a same data item.

11. The carrier device according to claim 9, wherein the processor is further configured to re-determine whether the carrier signal is detected at the interface harness when the carrier signal is neither received via the interface harness nor received via the SCI within the predetermined initial time.