EP-4738135-A1 - METHOD AND DEVICE FOR BIDIRECTIONAL COMMUNICATION FOR HYDROGEN FUELING

EP4738135A1EP 4738135 A1EP4738135 A1EP 4738135A1EP-4738135-A1

Abstract

This method for bidirectional communication for hydrogen fueling comprises the steps of: negotiating a communication protocol with a dispenser for fueling hydrogen mobility with hydrogen, the communication protocol being negotiated on the basis of interoperability or compatibility-related information checked in advance with the dispenser; negotiating a fueling protocol; negotiating a fueling parameter on the basis of the fueling protocol; and, after hydrogen fueling is started on the basis of the negotiated fueling protocol and the negotiated fueling parameter, monitoring the state of the hydrogen fueling via fueling loop request messages and fueling loop response messages.

Inventors

SHIN, MIN HO
YOON, A EUN
SHIN, YE EUN
KIM, HYUNG KI

Assignees

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

Dates

Publication Date: 20260506
Application Date: 20240628

Claims (20)

A bidirectional communication method for hydrogen fueling performed by hydrogen mobility, the method comprising: negotiating, with a dispenser that supplies hydrogen to the hydrogen mobility, a communication protocol for a process of supplying hydrogen to the mobility, based on interoperability or compatibility information identified in advance between the dispenser and the mobility; negotiating, with the dispenser, fueling protocols for hydrogen fueling; negotiating, with the dispenser, fueling parameters based on the negotiated fueling protocols; and monitoring a start of the hydrogen fueling and a state of the hydrogen fueling through a fueling loop request message and a fueling loop response message, based on the negotiated fueling protocols and the negotiated fueling parameters.
The method of claim 1, wherein, in the monitoring, the fueling loop request message comprises a field for a current action and a field indicating a reason for the current action, and wherein the hydrogen fueling is started according to preset information of the field for the current action.
The method of claim 2, wherein, in the monitoring, the fueling loop response message comprises fields indicating a state, a reason, and a result for the current action, wherein the state field comprises information indicating that a current state corresponds to fueling, and the result field comprises information indicating that a monitoring result or a control state is normal.
The method of claim 3, wherein the monitoring comprises transmitting, to the dispenser, a message including information regarding a fueling loop of the hydrogen mobility, and receiving, from the dispenser, a message including information regarding a fueling loop of the dispenser corresponding to the fueling loop of the mobility.
The method of claim 3, wherein the monitoring comprises transmitting, to the dispenser, a fueling control request message including information for delaying fueling or reducing a unit fueling amount, and receiving, from the dispenser, a response message including information indicating a decrease or reduction of a fueling state or fueling speed.
The method of claim 3, wherein the monitoring comprises transmitting, to the dispenser, a fueling control request message requesting stop of fueling, and receiving, from the dispenser, a fueling state response message including information indicating that fueling is being stopped.
The method of claim 3, wherein the monitoring comprises transmitting, to the dispenser, information or parameters regarding a current tank temperature and a current tank pressure of the hydrogen mobility, and receiving, from the dispenser, parameters related to one or more of fueling start, fueling stop, ramping up, ramping down, or a current injection pressure.
The method of claim 3, wherein the monitoring comprises transmitting, to the dispenser, information or parameters regarding start, pause, resume, or terminate of fueling.
The method of claim 1, further comprising detecting an error occurring in a communication process for preparing the hydrogen fueling or in a process in which the dispenser supplies hydrogen to the hydrogen mobility, wherein the detected error is classified as a safety-critical error or a non-safety-critical error.
The method of claim 9, further comprising: determining, based on the detected error, whether to stop the communication process or the process of supplying hydrogen; and transmitting, to the dispenser, a message including information regarding whether to stop the communication process or the process of supplying hydrogen.
The method of claim 9, further comprising performing an error-handling procedure, based on the detected error being the non-safety-critical error, wherein the performing of the error-handling procedure comprises classifying the detected error as one or more of a communication error, a system error, or a qualitative error.
The method of claim 11, further comprising determining whether to replace a first fueling protocol used for the communication process or the hydrogen fueling process with a fallback second fueling protocol, based on the detected error being the non-safety-critical error.
The method of claim 9, further comprising performing an emergency-handling procedure, based on the detected error being the safety-critical error.
A bidirectional communication method for hydrogen fueling performed by a dispenser that supplies hydrogen to hydrogen mobility or by a hydrogen fueling station including the dispenser, the method comprising: negotiating, with the hydrogen mobility and based on interoperability or compatibility information identified in advance, a communication protocol for a process of supplying hydrogen to the mobility; negotiating, with the hydrogen mobility, fueling protocols for hydrogen fueling; negotiating, with the hydrogen mobility, fueling parameters based on the negotiated fueling protocols; and monitoring a start of the hydrogen fueling and a state of the hydrogen fueling through a fueling loop request message and a fueling loop response message, based on the negotiated fueling protocols and the negotiated fueling parameters.
The method of claim 14, wherein, in the monitoring, the fueling loop request message comprises a field for a current action and optionally comprises a field indicating a reason for the action, and wherein the hydrogen fueling is started according to preset information of the field for the action.
The method of claim 15, wherein, in the monitoring, the fueling loop response message comprises fields indicating a state, a reason, and a result for the current action, wherein the state field comprises information indicating that the current state corresponds to fueling, and the result field comprises information indicating that a monitoring result or a control state is normal.
The method of claim 14, further comprising controlling parameters including a pressure ramp rate or an average pressure ramp rate, based on information from the hydrogen mobility, to control a fueling rate in the hydrogen fueling.
The method of claim 14, further comprising detecting an error occurring in a communication process for preparing the hydrogen fueling or in a process in which the dispenser supplies hydrogen to the hydrogen mobility, wherein the detected error is classified as a safety-critical error or a non-safety-critical error.
The method of claim 18, further comprising receiving, from the hydrogen mobility, a message including information or parameters indicating whether to stop the communication process or the hydrogen fueling process based on the detected error.
The method of claim 18, further comprising performing an error-handling procedure, based on the detected error being the non-safety-critical error, wherein performing the error-handling procedure comprises classifying the detected error as one or more of a communication error, a system error, or a qualitative error.

Description

[Technical Field] The present disclosure relates to a communication technology for processing hydrogen fueling from a hydrogen/refueling station or a dispenser to hydrogen mobility, and, more specifically, relates to a bidirectional communication method for a hydrogen fueling process and a device utilizing the bidirectional communication method, the hydrogen fueling process being capable of improving safety, compatibility, efficiency, and reliability of hydrogen fueling. [Background Art] The content described in this portion merely provides background information regarding exemplary embodiments and does not provide related art. Hydrogen mobility means mobility that uses hydrogen as an energy source or generates electric energy by using hydrogen as fuel and drives an electric motor by using the generated electric energy. Hydrogen mobility includes hydrogen cars, hydrogen electric cars, industrial trucks, trains, ships, aircraft, aerial mobility, or the like, and refers to all devices that generate electric energy by using hydrogen as fuel and drive by using the generated electric energy. Hydrogen mobility is referred to as hydrogen-fuelled mobility or hydrogen-powered mobility, and, in the case of vehicles, hydrogen mobility is generally classified into hydrogen electric cars and hydrogen-fuelled cars. A hydrogen electric car means a zero-emission vehicle that moves by electric energy generated when high-pressure hydrogen stored in a vehicle meets air in the atmosphere. A hydrogen electric car is also referred to as a hydrogen fuel cell vehicle, a fuel cell electric vehicle (FCEV), or simply a hydrogen car. Most hydrogen electric cars generate electricity by using a fuel cell system that utilizes hydrogen as an energy source, and move by driving a motor with the generated electricity. A hydrogen electric car emits only pure water (H2O) in the process of generating electricity and has a function of removing ultrafine dust in the atmosphere during driving, and therefore attracts attention as future eco-friendly mobility. A hydrogen-fuelled car is a vehicle that uses hydrogen as fuel, but, unlike a hydrogen electric car, drives a vehicle motor with heat generated by directly combusting hydrogen in an internal combustion engine (ICE). A hydrogen fueling method for a hydrogen-fuelled car is not significantly different from a hydrogen fueling method for a hydrogen electric car. The above-described hydrogen mobility has been widely recognized as a technology having potential to be utilized across industries in that hydrogen as fuel is infinite on Earth and a process of producing energy is eco-friendly. Meanwhile, in order to use hydrogen mobility, hydrogen mobility or a user thereof needs to charge hydrogen fuel into a hydrogen tank of hydrogen mobility at a hydrogen/refueling station that provides a hydrogen fueling service and needs to pay hydrogen fueling cost. In particular, a hydrogen fueling process, a control technique, or a protocol therefor is being automated through computing techniques, and, in such an automated environment, importance of security in hydrogen fueling communication between hydrogen infrastructure and hydrogen mobility is increasing. For example, in a general automated control technique for supplying hydrogen fuel to a vehicle that uses hydrogen as fuel, a final goal is to control temperature and pressure of a compressed hydrogen storage system (CHSS) for safety of hydrogen fueling under a limit temperature and a limit pressure condition of the CHSS. The above-described hydrogen fueling process, control technique, and protocol for a hydrogen electric car are provisions made when past wired/wireless communication technologies or computing techniques for control were not mature and therefore do not properly reflect recent achievements of information and communications technology (ICT). Therefore, a conventional hydrogen fueling technology for a hydrogen electric car is inefficient, slow, and not suitable for large-capacity hydrogen fueling. In particular, in hydrogen fueling communication, in the case of wireless communication, most hydrogen fueling control devices utilize a unidirectional infrared communication device. Therefore, a conventional wireless-based hydrogen fueling communication still has limitations and vulnerabilities of unidirectional communication. As described above, there is a need for a new scheme for current hydrogen fueling communication. [Disclosure] [Technical Problem] The present disclosure has been derived to solve problems of the related art described above, and an object of the present disclosure is to provide a hydrogen fueling bidirectional communication method and a device capable of overcoming limitations and vulnerabilities of conventional unidirectional communication in a communication protocol for a hydrogen fueling process or a hydrogen fueling process of hydrogen mobility and capable of improving safety, compatibility, efficiency, and reliability of hydrog