EP-4741216-A1 - COMMUNICATION METHOD AND APPARATUS FOR BIDIRECTIONAL POWER TRANSFER IN ELECTRIC VEHICLE USING GRID CODE PARAMETER

Abstract

A charging communication method for electric mobility charging, according to the present invention, comprises the steps of: an EVCC requesting a grid code related to a BPT function from an EVSE; the EVCC receiving the grid code of a power network from the EVSE; and the EVCC performing, on the basis of the grid code of the EVSE, a subsequent preparation procedure related to the BPT function.

Inventors

• SEONG, JAE YONG
• JUNG, TAEK HYUN
• KIM, SEONG RAE
• LEE, DONG JUN
• KIM, JAE HYUN
• SHIN, MIN HO

Assignees

• Hyundai Motor Company
• Kia Corporation
• Myongji University Industry and Academia Cooperation Foundation

Dates

Publication Date

20260513

Application Date

20240729

Claims (20)

1. A charging communication method for charging an electric mobility, performed by an electric vehicle communication controller (EVCC) of an electric mobility, comprising: requesting, by the EVCC, grid code information related to a bidirectional power transfer (BPT) function to an electric vehicle supply equipment (EVSE) that transfers power to the electric mobility; receiving, by the EVCC, a message including grid code information of a power network to which the EVSE belongs, from the EVSE; and performing, by the EVCC, a procedure related to the bidirectional power transfer function based on the grid code information of the EVSE.
2. The charging communication method of claim 1, wherein the grid code information includes information of a country, a region, or an authority of the power network to which the EVSE belongs.
3. The charging communication method of claim 1, wherein the message including the grid code information includes information related to a low voltage ride through (LVRT) or high voltage ride through (HVRT) for responding to a process in which a power supply device is coupled to or separated from the power network, defined in the power network, or information related to a reactive power response time.
4. The charging communication method of claim 1, wherein the message including the grid code information includes information of a power, a voltage, or a safety specification of a process in which power is transferred between the electric mobility and the EVSE.
5. The charging communication method of claim 1, wherein the requesting of the grid code information and the receiving of the message including the grid code information are performed as part of, or together with, a process in which the electric mobility and the EVSE exchange function information supported by each other and check compatibility between the electric mobility and the EVSE.
6. The charging communication method of claim 1, wherein the requesting of the grid code information and the receiving of the message including the grid code information are performed as part of, or together with, a process in which the EVCC discovers the EVSE and connects to a communication network to which the EVSE belongs or connects to the EVSE.
7. The charging communication method of claim 1, wherein the requesting of the grid code information and the receiving of the message including the grid code information are performed as part of, or together with, a process in which an initial setup is performed between the EVCC and the EVSE.
8. The charging communication method of claim 1, wherein the requesting of the grid code information and the receiving of the message including the grid code information are performed as part of, or together with, a process in which authorization or services negotiation is performed between the EVCC and the EVSE.
9. The charging communication method of claim 1, wherein the requesting of the grid code information and the receiving of the message including the grid code information are performed as part of, or together with, a process in which parameters are exchanged between the EVCC and the EVSE.
10. The charging communication method of claim 1, wherein the message including the grid code information includes information related to power supply capabilities supported by the EVSE.
11. An electric vehicle communication controller (EVCC) arranged in an electric mobility and associated with a secondary assembly that receives power from a primary assembly, comprising: a processor configured to execute at least one instruction; wherein the processor is configured to: request grid code information related to a bidirectional power transfer (BPT) function to an electric vehicle supply equipment (EVSE) corresponding to the primary assembly; receive, by the EVCC, a message including grid code information of a power network to which the EVSE belongs, from the EVSE; and perform, by the EVCC, a procedure related to the bidirectional power transfer function based on the grid code information of the EVSE.
12. The EVCC of claim 11, wherein the grid code information includes information of a country, a region, or an authority of the power network to which the EVSE belongs.
13. The EVCC of claim 11, wherein the message including the grid code information includes information related to a low voltage ride through (LVRT) or high voltage ride through (HVRT) for responding to a process in which a power supply device is coupled to or separated from the power network, defined in the power network, or information related to a reactive power response time.
14. The EVCC of claim 11, wherein the message including the grid code information includes information of a power, a voltage, or a safety specification of a process in which power is transferred between the electric mobility and the EVSE.
15. The EVCC of claim 11, wherein the processor is configured to request the grid code information to the EVSE and receive the message including the grid code information from the EVSE as part of, or together with, a process in which the electric mobility and the EVSE exchange function information supported by each other and check compatibility between the electric mobility and the EVSE.
16. A charging communication method for charging an electric mobility, performed by a supply equipment communication controller (SECC) associated with a primary assembly that transfers power to an electric mobility, comprising: receiving a message requesting grid code information related to a bidirectional power transfer (BPT) function from the electric mobility; transmitting a message including grid code information of a power network to which an electric vehicle supply equipment (EVSE) corresponding to the primary assembly belongs, to the electric mobility; and performing, by the EVSE, a procedure related to the bidirectional power transfer function based on the grid code information.
17. The charging communication method of claim 16, wherein the grid code information includes information of a country, a region, or an authority of the power network to which the EVSE belongs.
18. The charging communication method of claim 16, wherein the message including the grid code information includes information related to a low voltage ride through (LVRT) or high voltage ride through (HVRT) for responding to a process in which a power supply device is coupled to or separated from the power network, defined in the power network, or information related to a reactive power response time.
19. The charging communication method of claim 16, wherein the message including the grid code information includes information of a power, a voltage, or a safety specification of a process in which power is transferred between the electric mobility and the EVSE.
20. The charging communication method of claim 16, wherein the receiving of the message requesting the grid code information from the electric mobility and transmitting of the message including the grid code information to the electric mobility are performed as part of, or together with, a process in which the electric mobility and the EVSE exchange function information supported by each other and check compatibility between the electric mobility and the EVSE.

Description

[Technical Field] The present disclosure relates to a bidirectional power transfer (BPT) method and apparatus between an electric vehicle (EV) or an electric mobility and a grid, and, more particularly, to a communication method and apparatus for a bidirectional power transfer between an electric vehicle or an electric mobility and the grid. [Background Art] The matters described in this section are provided merely as background information for understanding exemplary embodiments and do not constitute prior art. Recently developed electric vehicles (EVs) drive motors using battery power, and have advantages such as fewer air pollutants such as exhaust gas and noise compared to conventional gasoline engine vehicles, fewer failures, long service life, and simple driving operation. Electric vehicles may be classified into a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), and an electric vehicle (EV) depending on driving sources. An HEV includes an engine as a main power source and a motor as an auxiliary power source. A PHEV includes a motor as a main power source and an engine used when the battery is discharged. An EV includes a motor but does not include an engine. An electric vehicle charging system may basically be defined as a system for charging a battery mounted in an electric vehicle by using power of a power distribution grid or an energy storage device. The electric vehicle charging system may have various forms depending on the type of electric vehicle. For example, the electric vehicle charging system may include a conductive charging system using a cable or a contactless wireless power transfer system. During charging of an electric vehicle, a vehicle assembly (VA) mounted in the electric vehicle may form inductive resonant coupling with a transmission pad of a ground assembly (GA) located at a charge station or charging spots. The electric vehicle may charge its battery by using power delivered from the ground assembly through the inductive resonant coupling. A robot arm or a manipulator may be used to supply power from an electric vehicle supply equipment (EVSE) to a charging door or port of an electric vehicle. In this case, considering various types of electric vehicle charging doors, various types of electric vehicle supply equipment, and various charging methods, it is necessary to define procedures for positioning between an electric vehicle and a manipulator and procedures for a preparation stage for supplying power. A message sequence between a grid and an electric vehicle (EV) may be performed by exchanging predefined request and response message pairs between a supply equipment communication controller (SECC) located on the grid side and an electric vehicle communication controller (EVCC) mounted in the electric vehicle. An electric vehicle typically charges a vehicle battery through a charging method using an automatic connection device, a wireless power transfer method, an AC charging method, or a DC charging method. To charge the battery, the electric vehicle exchanges messages with the SECC relating to a session setup, a vehicle positioning setup, vehicle positioning, pairing, authentication and authorization setup, authentication and authorization, service discovery, service detail, and service selection. For example, after the electric vehicle receives a vehicle-positioning-setup response message, when the electric vehicle cannot find a compatible method for positioning or pairing for the automatic connection device or the wireless power transfer, the electric vehicle may move to a service discovery state through service renegotiation in a session-stop state. However, in related standards (e.g., ISO 15118) or in the prior art, an automatic connection device pantograph (ACDP) protocol for message sequencing between an electric vehicle and a grid is insufficient, and it is necessary to modify message parameters, and accordingly, a change in message sequence is required. In addition, in related standards or in the prior art, separate definitions of additional VSE (Vendor Specific Element) information parameters for an automatic connection device underbody (ACDU) or an automatic connection device sidearm (ACDS) are required. [Disclosure] [Technical Problem] The objective of the present disclosure is to provide an improved ISO 15118-based charging communication method and apparatus for an electric mobility and an electric vehicle supply equipment (EVSE) that provide a bidirectional power transfer (BPT) function. Although various communication technologies may be used, each communication technology has strengths and weaknesses, and according to the present disclosure, selective application of communication technologies that may perform roles more effectively in various procedures of an electric mobility charging process is proposed. In this process, by considering various types of electric mobility charging doors, various types of electric vehicle supply equipm