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KR-20260064234-A - METHOD AND APPARATUS FOR AUTHENTICATION ELECTRIC VEHICLE PLUG AND CHARGE

KR20260064234AKR 20260064234 AKR20260064234 AKR 20260064234AKR-20260064234-A

Abstract

One aspect of the present invention discloses a plug and charge authentication method and apparatus for electric vehicles performed by a charging station. The method comprises the steps of: receiving a first request message requesting a certificate update from a charging station management system (CSMS); transmitting a first response message in response to the first request message; generating a new authentication key for V2G (Vehicle to Grid) authentication of a first electric vehicle connected to a first charger among a plurality of chargers; transmitting a second request message including an EVSE field for requesting a certificate of the first charger; receiving a second response message in response to the second request message; receiving a third request message including a signed certificate from a certification authority server through the charging station management system; and transmitting a third response message in response to the third request message in response to verifying the signed certificate.

Inventors

  • 이용길

Assignees

  • 스테핑스톤 주식회사

Dates

Publication Date
20260507
Application Date
20241031

Claims (7)

  1. In an electric vehicle plug and charge authentication method performed by a charging station, A step of receiving a first request message requesting a certificate update from a Charging Station Management System (CSMS); A step of transmitting a first response message to the charging station management system in response to the first request message; A step of generating a new authentication key for V2G (Vehicle to Grid) authentication of a first electric vehicle connected to a first charger among a plurality of chargers, wherein the authentication key is a pair of authentication keys comprising a public key and a private key; A step of transmitting a second request message including an EVSE field for requesting a certificate of the first charger to the charging station management system, wherein the second request message is a message transmitted based on the charging station setting the identification information (Supply Equipment Communication Controller Identifier, SECCID) of the charging control and communication module (Supply Equipment Communication Controller, SECC) included in the first charger; A step of receiving a second response message from the charging station management system as a response to the second request message; The step of receiving a third request message containing a signed certificate from a certification authority server through the charging station management system, wherein the signed certificate is a certificate issued by the certification authority server in response to the charging station management system transmitting a Certificate Signing Request (CSR) field included in the second request message to the certification authority server; and An electric vehicle plug and charge authentication method comprising the step of transmitting a third response message to the charging station management system in response to the third request message in response to verifying the signed certificate.
  2. In Article 1, The above second request message is a SignCertificateRequest message, and An electric vehicle plug-and-charge authentication method, wherein the first request message above is a Trigger message that triggers the SignCertificateRequest message.
  3. In claim 1, the step of transmitting the second request message to the charging station management system is, An electric vehicle plug and charge authentication method comprising the step of setting the CommonName in the certificate signature request field as the identification information and transmitting it.
  4. In Paragraph 3, An electric vehicle plug and charge authentication method in which the identification information set within the certificate signature request field matches the identification information indicated by the EVSE field included in the first request message.
  5. In Article 1, An electric vehicle plug-and-charge authentication method further comprising the step of setting identification information of a charging control and communication module included in a second charger connected to a second electric vehicle among a plurality of chargers provided in the charging station.
  6. In Article 5, An electric vehicle plug-and-charge authentication method in which the identification information of the second charger is set using at least one of a plurality of V2G certificates received from the charging station management system.
  7. In Article 1, An electric vehicle plug and charge authentication method further comprising the step of receiving a request for identification information set before being updated to the plurality of chargers from the charging station management system prior to receiving the first request message above.

Description

Method and apparatus for authentication of electric vehicle plug and charge The present invention relates to an electric vehicle plug-and-charge authentication method and apparatus, and more specifically, to a method and apparatus for authenticating and identifying a charging control and communication module of a charger to charge an electric vehicle battery based on a standard communication protocol. Currently commercialized charging stations for electric vehicles include power cables or other conductors that are detachable from the electric vehicle. The charging station can receive electricity from an electrical distribution network or other electrical sources and transmit power to the electric vehicle through the power cable. While the adoption of electric vehicles (EVs) is increasing due to growing demand, the number of charging stations is not growing proportionally, causing difficulties for EV drivers in charging their batteries. As user demand for EVs is expected to continue rising, various requirements are being raised to manage power delivery to these vehicles. Therefore, there is a need for the development of technology that can resolve the problems associated with conventional EV charging and reflect user requirements. Figure 1 is a schematic diagram showing the overall configuration of an electric vehicle charging system. Figure 2 is a diagram showing the internal configuration of an electric vehicle and a charger. Figure 3 is a diagram showing the configuration of a charging station. Figure 4 is a diagram showing the configuration of a bidirectional charging system. Figure 5 is a diagram showing the overall configuration of an electric vehicle charging operation management system. Figure 6 is a drawing showing a plurality of chargers equipped in a charging station. FIG. 7 is a flowchart of an electric vehicle plug-and-charge authentication method according to one embodiment of the present invention. The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and/or" includes a combination of a plurality of related described items or any of a plurality of related described items. When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding of the present invention, the same reference numerals are used for identical components in the drawings, and redundant descriptions of identical components are omitted. Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. However, some components unrelated to the gist of the invention may be omitted or com