Mobile hydrogen gas charging device

Abstract

The present invention relates to a mobile hydrogen gas charging device that is moved and installed in the field in a mobile manner to charge a hydrogen charging container with hydrogen and, more specifically, to a mobile hydrogen gas charging device that can fundamentally block the possibility of safety accidents that may occur due to user carelessness or defects in a hydrogen charging container. In particular, the mobile hydrogen gas charging device automatically recognizes the specifications, appearance, and external condition of the hydrogen charging container to be charged with hydrogen, so that even if the user inadvertently fails to input or incorrectly inputs the chargeable pressure, number of times, or the like, safety accidents can be prevented by automatically inputting or correcting the corresponding information. In addition, during the hydrogen charging process, temperature changes, volume changes, and the like for a plurality of hydrogen charging containers are monitored in real time so that charging can be safely performed.

Description

Mobile hydrogen gas charging device

[0001] The present invention relates to a mobile hydrogen gas charging device that is movable and installed on site to charge hydrogen in a hydrogen charging container, and more specifically, to a mobile hydrogen gas charging device that can fundamentally block the possibility of a safety accident that may occur due to the user's carelessness or a defect in the hydrogen charging container, and in particular, automatically recognizes the specifications, appearance, and external condition of a hydrogen charging container that is a target of hydrogen charging, so that even if the user carelessly does not input or incorrectly inputs the charging pressure or number of times, the corresponding information is automatically input or corrected to prevent safety accidents, and further, monitors temperature changes, volume changes, etc. of a plurality of hydrogen charging containers in real time during the hydrogen charging process to ensure safe charging.

[0002] Hydrogen is the first chemical element on the periodic table, and is the simplest element consisting of one proton and one electron. It makes up 75% of the universe by mass, making it the most common element in the universe. Hydrogen exists primarily in the molecular form of H2 in nature, and due to its chemical properties, it exists in a gaseous state under normal conditions. This hydrogen gas can be easily captured by electrolysis of water (H2O) or by reacting organic substances under catalytic conditions. In addition, since a huge amount of hydrogen is generated as a byproduct in petrochemical processes, it can be easily utilized.

[0003] Hydrogen energy utilizes the energy produced by the reaction of hydrogen with oxygen. A representative example of this is the fuel cell, a power generation system that produces electricity and heat through the electrochemical reaction of hydrogen and oxygen. Because it generates electricity directly without the need for fuel combustion, it reduces energy loss and increases power generation efficiency. For example, while the utilization efficiency of electrical energy produced at power plants is 35%, the overall energy efficiency of a hydrogen fuel cell is approximately 80%. Furthermore, since the only byproduct produced during the energy generation process is pure water, it is significantly more environmentally friendly than conventional fossil fuel-based energy generation processes. Unlike fossil fuels, which have significant regional variations in reserves, hydrogen fuel cells can be supplied domestically, replacing energy imports and offering significant economic benefits.

[0004] However, hydrogen is inherently very light, has a very low storage density per unit volume, and is a flammable gas, making it difficult to handle. Therefore, to address these issues, hydrogen must be handled under high pressure or in liquefied form, and handling standards are also strict to ensure safety. This inevitably leads to the enlargement and complexity of hydrogen energy-related facilities and infrastructure, resulting in issues with economy, convenience, and accessibility. Furthermore, the complex handling methods require users to possess a certain level of knowledge and manual operation skills, such as when filling hydrogen tanks, resulting in various inconveniences.

[0005] Furthermore, prior art has had problems with inefficient configurations, leading to oversized or complex hydrogen charging devices. Specifically, when implementing components that monitor the charging process to ensure device safety, as described in the patent document below, multiple monitoring devices are required to monitor even a single charging target, making it difficult to miniaturize or simplify the device.

[0006] <Patent Document>

[0007] Patent Publication No. 10-1987357 (published on September 30, 2019) "Hydrogen charging system including hydrogen storage tank and method for operating the same."

[0008] The present invention has been devised to solve the above problems.

[0009] The purpose of the present invention is to provide a mobile hydrogen gas charging device that can fundamentally block the possibility of a safety accident that may occur due to the user's carelessness or a defect in the hydrogen charging container, especially when performing hydrogen charging of a hydrogen charging container of a hydrogen fuel mobility product that is difficult to leave the site or is required to be operated only within a specific facility, such as hydrogen-fueled industrial equipment or military equipment, by moving the hydrogen gas charging device to the site and installing it there (i.e., meaning a mobile multi-purpose integrated hydrogen gas charging device).

[0010] Another object of the present invention is to provide a portable hydrogen gas charging device that automatically recognizes the specifications, appearance, and external condition of a hydrogen charging container that is a target of hydrogen charging, and automatically inputs or corrects the information even if the user carelessly fails to input or incorrectly inputs the charging pressure or number of times, thereby preventing safety accidents.

[0011] Another object of the present invention is to provide a mobile hydrogen gas charging device that transmits data obtained through vision recognition regarding specifications, specifications, and conditions of a hydrogen charging container as a target of hydrogen charging through wired or wireless communication, and manages the latest data in a database such as a server (in the present invention, the term "database" includes a database managed by a server and transmitting and receiving information online and a database managed by a control unit and transmitting and receiving information offline) so that a quick and accurate response to various new containers is possible, and also provides information support such as new registration or information modification for specifications of containers for which there is no data in the database.

[0012] Another object of the present invention is to provide a mobile hydrogen gas charging device that monitors temperature changes, volume changes, etc. of multiple hydrogen charging containers in real time with a single observation device during the hydrogen charging process, thereby ensuring safe charging.

[0013] In order to achieve the above-mentioned purpose, the present invention is implemented by an embodiment having the following configuration.

[0014] According to one embodiment of the present invention, a mobile hydrogen gas charging device according to the present invention includes a hydrogen gas guide line that provides a path for hydrogen gas to move; a pressurizing unit that compresses hydrogen gas; a storage unit that receives and stores hydrogen gas; a charging unit that receives a user's hydrogen charging container and provides hydrogen gas to the user's hydrogen charging container; a cooling unit that is connected to the hydrogen gas guide line or the charging unit and performs cooling of the hydrogen gas or the charging unit; and a control unit that controls a hydrogen gas charging process in the pressurizing unit, the storage unit, the cooling unit, and the charging unit, wherein the charging unit includes a charging space formed therein, one or more receiving units formed in the charging space and receiving the user's hydrogen charging container, a vision recognition unit that recognizes and analyzes a state of the hydrogen charging container received in the receiving unit and provides charging-related control information, and a monitoring unit that monitors the charging state of the hydrogen charging container received in the receiving unit.

[0015] According to another embodiment of the present invention, the vision recognition unit in the present invention includes a vision observation means for observing the state of the hydrogen charging container accommodated in the receiving portion, and the vision observation means is characterized in that it obtains and provides a plurality of images or continuous image information about the process of accommodating the hydrogen charging container in the receiving portion or the state of the hydrogen charging container accommodated in the receiving portion in an image or video format.

[0016] According to another embodiment of the present invention, the vision recognition unit is characterized in that it further includes a specification recognition module that provides charging-related specification information for the hydrogen charging container by confirming recognition information such as serial number, barcode, QR code, text or picture specification information of the hydrogen charging container based on information provided by the vision observation means, an appearance recognition module that provides charging-related appearance information for the hydrogen charging container by confirming the appearance of the hydrogen charging container based on information provided by the vision observation means, an appearance status recognition module that provides charging-related appearance information for the hydrogen charging container by confirming the appearance of the hydrogen charging container based on information provided by the vision observation means, and a first charging control means that controls a charging process in the charging unit based on information provided by the specification recognition module, the appearance recognition module, and the appearance status recognition module.

[0017] According to another embodiment of the present invention, the vision recognition unit is characterized in that it further includes a specification registration module that registers specification information for a hydrogen charging container based on text or external information written on a hydrogen charging container recognized by the vision observation means when there is no specification information related to charging in a database for the hydrogen charging container recognized by the vision observation means, and a specification modification module that modifies the specification information for the hydrogen charging container recorded in a database when the specification information written in a serial number, barcode, or QR code of the hydrogen charging container recognized by the vision observation means is different from the specification-related text or external information written on the hydrogen charging container recognized by the vision observation means.

[0018] According to another embodiment of the present invention, the monitoring unit is characterized by including an infrared observation means for observing infrared rays emitted from a user's hydrogen charging container accommodated in the receiving unit, an infrared judgment means for observing the state of the hydrogen charging container during the hydrogen charging process and judging whether there is an abnormality based on the infrared observation result observed from the infrared observation means, and a second charging control means for controlling the charging process in the charging unit based on the judgment result from the infrared judgment means in conjunction with the control unit.

[0019] According to another embodiment of the present invention, the infrared observation means includes an infrared module that transmits infrared rays emitted from the user's hydrogen charging container accommodated in the receiving portion, and an infrared detection module that detects the infrared rays transmitted from the infrared module and generates an electrical signal based on the infrared rays transmitted from the infrared module, and the infrared determination means includes a position coordinate generation module that generates position coordinates of the charging space, a reference coordinate generation module that identifies the user's hydrogen charging container accommodated in the receiving portion and substitutes the shape of the identified user's hydrogen charging container into the position coordinates to generate reference coordinates for the user's hydrogen charging container, a real-time synchronization module that synchronizes the infrared observation result observed from the infrared observation means with the reference coordinates in real time to generate real-time reference coordinate measurement values, a temperature monitoring module that monitors in real time a temperature change of the user's hydrogen charging container based on the real-time reference coordinate measurement values, a volume monitoring module that monitors in real time a volume change of the user's hydrogen charging container based on the real-time reference coordinate measurement values, and a temperature and volume monitoring module that respectively monitors the temperature and volume monitored by the temperature monitoring module and the volume monitoring module. It includes an abnormality judgment module that judges whether there is an abnormality in the charging process by comparing it with a preset charging setting value, and the second charging control means includes an external temperature measurement module that observes the external air temperature, a charging unit temperature control module that controls the temperature within the charging space based on the external air temperature observed by the external temperature measurement module, and a control unit linkage module that transmits the judgment result from the infrared judgment means to the control unit and controls the charging process within the charging unit by a command from the control unit.

[0020] The present invention can obtain the following effects through the combination and use of the configuration described above and the following examples.

[0021] The present invention has the effect of fundamentally blocking the possibility of safety accidents that may occur due to user negligence or defects in the hydrogen charging container, particularly when moving to a site where hydrogen fuel mobility products, such as hydrogen-fueled industrial equipment or military equipment, are operated and where it is difficult to leave the site or where operation is required only within a specific facility, and performing hydrogen charging of the hydrogen charging container of the equipment.

[0022] The present invention automatically recognizes the specifications, appearance, and external condition of a hydrogen charging container that is a target for hydrogen charging, and has the effect of preventing safety accidents by automatically entering or correcting the information even if the user carelessly fails to enter or incorrectly enters the charging pressure or number of times.

[0023] The present invention transmits data obtained through vision recognition regarding the specifications, specifications, and status of a hydrogen charging container, which is a target of hydrogen charging, through wired or wireless communication, so that the data is always managed in a database such as a server, enabling quick and accurate response to various new containers, and has the effect of enabling information support such as new registration or information modification for specifications of containers for which there is no data in the database.

[0024] The present invention has the effect of enabling safe charging by monitoring temperature changes, volume changes, etc. of multiple hydrogen charging containers in real time with a single observation device during the hydrogen charging process.

[0025] Figure 1 is a configuration diagram of a mobile hydrogen gas charging device according to the present invention.

[0026] Figure 2 is a block diagram of the vision recognition unit of the present invention.

[0027] Figure 3 is a photograph of an example of a vision observation means.

[0028] Figure 4 is a photo of the usage status of the specification recognition module.

[0029] Figure 5 is a block diagram of the infrared judgment means of the present invention.

[0030] Figure 6 is a block diagram of the second charging control means of the present invention.

[0031] Hereinafter, preferred embodiments of a mobile hydrogen gas charging device according to the present invention will be described in detail with reference to the attached drawings. It should be noted that, among the drawings, identical components are represented by the same reference numerals wherever possible. Unless otherwise defined, all terms in this specification have the same general meaning as those terms understood by a person skilled in the art to which the present invention pertains, and if there is a conflict with the meaning of a term used in this specification, the definitions used in this specification shall apply. Throughout the specification, when a part is said to "include" a certain component, this does not mean that other components are excluded, but that other components may be further included, unless specifically stated otherwise. In addition, terms such as "... part" and "... module" described in the specification mean a unit that processes at least one function or operation, and this may be implemented by hardware, software, or a combination of hardware and software.

[0032]

[0033] Referring to FIGS. 1 to 6, a mobile hydrogen gas charging device according to an embodiment of the present invention (the 'mobile hydrogen gas charging device' as used herein means a multipurpose integrated hydrogen gas charging device that is movable, moves to a specific site, installs, and then supports charging hydrogen for various hydrogen charging containers at the installed site) comprises: an inlet portion (10) through which hydrogen gas is introduced from a hydrogen gas supply means external or internal to the hydrogen gas charging device (1); a hydrogen gas guide line (50) that provides a path through which hydrogen gas moves; a pressurizing portion (20) that compresses hydrogen gas; a storage portion (30) that receives and stores hydrogen gas; a charging portion (40) that receives a user's hydrogen charging container (2) and provides hydrogen gas to the user's hydrogen charging container (2); a cooling portion (60) that is connected to the hydrogen gas guide line (50) or the charging portion (40) and performs cooling of the hydrogen gas or the charging portion (40); And it may include a control unit (70) that controls the hydrogen gas charging process in the pressurizing unit (20), storage unit (30), cooling unit (60), and charging unit (40).

[0034] The above-mentioned inlet (10) is a configuration for introducing hydrogen gas into the charging process, and when hydrogen gas is supplied from outside the hydrogen gas charging device (1), it is directly connected to a means for supplying hydrogen gas from the outside to introduce hydrogen gas into the charging process, or when a separate hydrogen gas generating means such as a water electrolysis device or a separate built-in tank exists within the device (1), it means a configuration for introducing hydrogen gas generated by the hydrogen gas generating means or hydrogen gas stored in the built-in tank into the charging process.

[0035] The pressurizing unit (20) is a means for compressing hydrogen gas, and for this purpose, the pressurizing unit (20) preferably includes a gas compression means such as a gas booster, and the gas booster preferably compresses the gas by a piston method, but is not necessarily limited thereto. Due to the compression process performed in the pressurizing unit (20), the hydrogen gas can be compressed within a pressure range of preferably 1 to 700 bar, and thereby hydrogen gas can be smoothly charged into a hydrogen container such as a hydrogen charging container with a pressure of 350 bar currently in circulation. For example, the pressurizing unit (20) can receive hydrogen gas from the inlet unit (10) through the hydrogen gas guide line (50), and discharge the pressurized hydrogen gas into the storage unit (30) or the charging unit (40) through the hydrogen gas guide line (50).

[0036] The storage unit (30) is a means for receiving and storing hydrogen gas, and is preferably located on a path through which pressurized hydrogen gas is discharged from the pressurizing unit (20), and is formed to temporarily store the discharged high-pressure hydrogen gas while maintaining a constant pressure and then discharge the hydrogen gas while maintaining the constant pressure through a path toward the charging unit (40). For this purpose, the storage unit (30) preferably includes a hydrogen gas storage means capable of stably storing hydrogen gas while maintaining a high pressure, and the hydrogen gas storage means is preferably a buffer tank, but is not necessarily limited thereto. The buffer tank is formed to prevent an overpressure phenomenon of hydrogen gas that may occur when the compressed hydrogen gas is discharged when the gas booster compresses the hydrogen gas in a piston manner. The buffer tank is preferably formed with a capacity of less than one-tenth of a hydrogen container to be charged, but is not necessarily limited thereto, and it goes without saying that the capacity may be employed differently as needed. Meanwhile, when the buffer tank is employed, the hydrogen gas can be maintained at a constant pressure without an additional configuration such as a separate hydrogen storage tank, thereby contributing to miniaturization and mobility of the device. Meanwhile, the storage unit (30) can store the pressurized hydrogen gas discharged from the pressurization unit (20) while maintaining a pressure within a pressure range of preferably 1 to 400 bar, thereby enabling hydrogen gas to be smoothly charged into a hydrogen container such as a hydrogen charging container with a pressure of 350 bar currently in circulation without a separate hydrogen pressurization process, even using a charging method (cascade method) based on pressure equilibrium.

[0037] The above charging unit (40) accommodates the user's hydrogen charging container (2) and is a means for supplying (charging) hydrogen gas to the user's hydrogen charging container (2). The detailed configuration and process thereof will be described later.

[0038] The hydrogen gas guide line (50) is a means for providing a path for hydrogen gas to move, and is connected to the charging unit (40) via the pressurizing unit (20) and the storage unit (30), and may include a main guide line (51) that provides a path for delivering pressurized hydrogen gas discharged from the pressurizing unit (20) to the storage unit (30) and for delivering hydrogen gas stored in the storage unit (30) to the charging unit (40) to be supplied to the user's hydrogen charging container (2), or a bypass guide line (52) that provides a path for delivering pressurized hydrogen gas discharged from the pressurizing unit (20) directly to the charging unit (40) without passing through the storage unit (30) to be supplied to the user's hydrogen charging container (2). Meanwhile, one or more valves electrically connected to the control unit (70) may be formed on the path of the hydrogen gas guide line (50).

[0039] At this time, the valve is characterized by including a first valve (531) formed between the pressurizing portion (20) and the storage portion (30) on the main guide line (51), a second valve (532) formed between the storage portion (30) and the charging portion (40) on the main guide line (51), and a third valve (533) formed on the bypass guide line (52). With this configuration, the control unit (70) can perform a hydrogen charging process by the hydrogen gas charging method to be described below by controlling the opening and closing of the first valve (531), the second valve (532), and the third valve (533) or controlling the flow rate of the passing hydrogen gas based on the first pressure value, which is the pressure value of the hydrogen gas supplied from the external or internal hydrogen gas supply means of the hydrogen charging device flowing in from the inlet (10), the second pressure value, which is the pressure value of the hydrogen gas in the storage (30), and the third pressure value, which is the pressure value of the hydrogen gas in the user's hydrogen charging container (2). A detailed description thereof will be described later. At this time, the first valve (531), second valve (532) and third valve (533) are not particularly limited to any known valves, as long as they correspond to valves that are electrically connected to the control unit (70), such as solenoid valves and motorized valves, and can control whether or not the valves are opened and closed and the degree of opening and closing by the control unit (70).

[0040] Meanwhile, the hydrogen gas charging device (1) according to the present invention may additionally include an air guide line (not shown) which is a means for receiving air from the outside and supplying air to the pressurization unit (20), or a nitrogen guide line (not shown) which is a means for supplying the supplied nitrogen gas to the pressurization unit (20), but the nitrogen guide line, etc. may be omitted if necessary. In addition, the hydrogen gas charging device (1) according to the present invention may additionally include a pressure sensor for measuring pressure, and the pressure sensor is preferably formed in the inlet unit (10), the pressurization unit (20), the hydrogen gas guide line (50), and the storage unit (30), and the pressure sensor is not particularly limited to any known pressure sensor that can measure pressure and electrically transmit the measured value to the control unit (70).

[0041] The cooling unit (60) is configured to cool the high temperature and high pressure hydrogen gas discharged through a compression process in the pressurizing unit (20), or to cool the charging unit (40) as needed, and is preferably formed by being connected to the hydrogen gas guide line (50) or the charging unit (40), and more preferably, as shown in FIG. 1, it is preferably formed by being connected to a portion of the hydrogen gas guide line (50) corresponding to the path from the pressurizing unit (20) or the storage unit (30) to the charging unit (40). In the case of the high temperature and high pressure hydrogen gas discharged through a compression process in the pressurizing unit (20), it is preferable to cool the hydrogen gas to 25°C or lower, and more preferably, the high temperature and high pressure hydrogen gas is cooled to 15°C or lower. In general, it is widely known in the art that safety issues may arise when the temperature of hydrogen gas exceeds approximately 35℃ during hydrogen gas charging, and relevant laws and regulations limit the charging temperature of hydrogen gas to within 35℃. However, in sites where the device must be operated outdoors, the on-site temperature may exceed 35℃ depending on seasonal or time-of-day factors. Therefore, it is necessary to cool and maintain the high-temperature, high-pressure hydrogen gas within the above temperature range to resolve this issue. Meanwhile, the cooling unit (60) in the present invention can perform cooling of both the hydrogen gas and the charging unit (40) by connecting one external cooling device (e.g., a chiller, etc.) to the cooling unit (60) line. By applying a structure that connects a separate external cooling device in this way, the hydrogen gas charging device (1) itself can be miniaturized, which is advantageous in terms of device licensing, etc., and in particular, it has an advantage in terms of on-site mobile installation, etc.Meanwhile, the cooling medium utilized in the cooling unit (60) may be a general term for a medium capable of causing a cooling effect, but in the present specification, it is preferable to mean a medium capable of causing a cooling effect that is flowable in the form of a fluid (for example, a substance such as HFCs (Hydrofluorocarbons), HFOs (Hydrofluoroolefins), ammonia, or water).

[0042] The control unit (70) controls the overall charging process carried out in the hydrogen gas charging device (1), and in particular, can control the charging process based on the hydrogen gas pressure value of one or more of the hydrogen gas guide line (50), the pressurization unit (20), the storage unit (30), and the user's hydrogen charging container (2) in the charging unit (40), and also, when incorrect information is input before and during the charging process or an abnormality is observed during the charging process by the vision recognition unit (44) and the monitoring unit (42) described below, the control unit (70) can control the charging process by commanding actions such as resetting the charging value, stopping the charging process, adjusting the flow rate of hydrogen gas introduced into the charging unit (40), and notifying the manager and / or the user of this by displaying information thereon or using other communication means. This charging process can be performed by the control unit (70) on its own using a preset algorithm, etc., but, of course, can also be performed manually by the manager's operation as needed. In particular, a detailed description of the control processes performed between the control unit (70) and the first charging control means (445) / second charging control means (423) will be provided later.

[0043]

[0044] Hereinafter, the charging unit (40) will be described in more detail. As described above, the charging unit (40) of the present invention is characterized in that it automatically recognizes the specifications, appearance, and external state of the hydrogen charging container (2) that is the target of hydrogen charging, so as to fundamentally block the possibility of a safety accident that may occur due to the user's carelessness or a defect in the hydrogen charging container, and automatically inputs or corrects the information, or registers it as needed, even if the user carelessly does not input the charging pressure or number of times, and inputs it incorrectly, and monitors the temperature change, volume change, etc. of a plurality of hydrogen charging containers in real time during the hydrogen charging process to ensure safe charging. To this end, the charging unit (40) includes a charging space (43) formed therein, one or more receiving portions (41) formed in the charging space (43) and in which the user's hydrogen charging container is received, a vision recognition portion (44) that recognizes and analyzes the state of the hydrogen charging container received in the receiving portion (41) and provides charging-related control information, and a monitoring portion (42) that monitors the charging state of the hydrogen charging container received in the receiving portion (41). It may include. Meanwhile, a receiving guide line is formed on one side of the receiving unit (41) to guide the hydrogen gas supplied from the pressurizing unit (20) or the storage unit (30) to the user's hydrogen charging container (2), and a receiving valve may be formed on the receiving guide line to open and close the path or control the flow rate of the hydrogen gas passing through the path by being manually or electrically connected to the control unit (70) and operated by the control unit (70).Meanwhile, the charging unit (40) may additionally include a pressure sensor that measures pressure changes in the hydrogen charging container (2) during the charging process, or a separate temperature sensor that can measure temperature changes in the charging space (43) or container (2), but in particular, as will be described later, when an infrared camera is used as the infrared observation means (421) of the monitoring unit (42), a separate temperature sensor is unnecessary.

[0045] The above charging space (43) refers to a space formed inside the charging unit (40), and the space (43) is formed to be separated from the outside of the device (1) by a structure such as a wall surrounding the charging unit (40), or to be separated from other functional units formed inside. It is preferable that a part of the structure such as a wall surrounding the space (43) be formed to be a structure that can be opened and closed so that a user can mount his or her own hydrogen charging container (2) in the receiving unit (41) or an administrator can perform management, inspection, etc. Meanwhile, the charging space (43) can be cooled by the cooling unit (60).

[0046] The above-described receiving portion (41) is characterized in that it is formed in a plurality of pieces. In Fig. 1, an example in which two receiving portions are formed is illustrated, but this is not necessarily limited thereto, and it goes without saying that three or more receiving portions may be formed as needed. Each of the receiving portions (41) includes the receiving guide line formed on one side, and each of the receiving guide lines may have a receiving valve formed on its path as described above. Through this, the control portion (70) can control the charging process operation only in some of the receiving portions (41) among the plurality of receiving portions (41), when the charging process is performed only in some of the receiving portions (41). In the case of a conventional hydrogen charging device, when charging hydrogen gas to multiple applications simultaneously, the pressure of the hydrogen gas supplied to each application is frequently not the same due to mechanical defects, etc. However, in the case of the charging unit (40) of the hydrogen gas charging device (1) according to the present invention, by adopting the above configuration and coupling relationship, the pressure of the supplied hydrogen gas can be maintained at the same and constant level even when multiple charging processes are performed simultaneously, and stable charging can be performed regardless of whether multiple charging processes are performed simultaneously or only some of them are performed. In addition, a flexible response is possible even when an unexpected failure occurs in some of the receiving units (41) among the plurality of receiving units (41). It is preferable that each of the receiving units (41) has a fastening device formed on one side, and the fastening device fastens and fixes the user's hydrogen charging container (2) on one side, and is connected to the receiving guide line on the opposite side, so that the hydrogen gas guided from the receiving guide line can be supplied to the user's hydrogen charging container (2) while the user's hydrogen charging container (2) is fastened and fixed. The above-mentioned fastening device is further provided with a pressure sensor to measure the pressure of the hydrogen gas ultimately supplied.

[0047] The above vision recognition unit (44) is configured to automatically recognize the specifications, appearance, and external state of a hydrogen charging container, which is a target of hydrogen charging, and to automatically input or correct the information, or newly register it as needed, even if the user inadvertently does not input the charging pressure or number of times, or inputs it incorrectly. To this end, more specifically, the vision recognition unit (44) comprises: a vision observation means (441) for observing the state of a hydrogen charging container accommodated in the accommodation unit (41); a specification recognition module (442) for providing charging-related specification information for the hydrogen charging container by confirming recognition information such as serial number, barcode, QR code, text or picture-written specification information of the hydrogen charging container based on the information provided by the vision observation means (441); an appearance recognition module (443) for confirming the appearance of the hydrogen charging container based on the information provided by the vision observation means (441) and providing charging-related external state information for the hydrogen charging container; and a hydrogen charging module (444) for confirming the appearance of the hydrogen charging container based on the information provided by the vision observation means (441) and performing hydrogen charging. An appearance recognition module (444) that provides appearance status information related to charging for a container, a first charging control means (445) that controls a charging process in the charging unit (40) based on information provided from the specification recognition module (442), the appearance recognition module (443) and the appearance status recognition module (444), and a specification registration module (446) that registers specification information for a hydrogen charging container (2) based on text or appearance information written in the hydrogen charging container (2) recognized by the vision observation means (441) when there is no specification information related to charging in the database for the hydrogen charging container (2) recognized by the vision observation means (441), and a serial or barcode of the hydrogen charging container (2) recognized by the vision observation means (441),If the specification information recorded in the QR code and the text or external information related to the specifications written on the hydrogen charging container (2) recognized by the vision observation means (441) are different from each other, a specification modification module (447) may be included to modify the specification information for the hydrogen charging container (2) recorded in the database.

[0048] The above vision observation means (441) is configured to observe the state of the hydrogen charging container accommodated in the receiving portion (41), and various devices capable of obtaining vision such as images or videos, such as a camera that takes pictures or a camera that takes images, can be utilized / applied (see FIG. 3, in the case of FIG. 3, it is an example at the level of examining the applicability of utilizing the vision observation means (441) as a prototype, and a very small-sized camera, etc. can be utilized in actual commercialization). In particular, the vision observation means (441) can acquire and provide multiple images or continuous image information about the process of accommodating the hydrogen charging container (2) in the receiving portion (41) or the state of the hydrogen charging container (2) accommodated in the receiving portion (41) in an image or video format. In other words, it acquires and provides multiple image information or continuous image information about the process of accommodating the hydrogen charging container (2) in the receiving portion (41) to the state after accommodating it. In particular, in the case of the above vision observation means (441), even when multiple hydrogen charging containers (2) are mounted in the charging unit (40), the status of multiple containers can be observed and information can be obtained through one vision observation means (441), so that the device can be miniaturized and economically feasible.

[0049] The above specification recognition module (442) is configured to provide charging-related specification information for the hydrogen charging container by checking recognition information such as serial number, barcode, QR code, text or picture-written specification information of the hydrogen charging container based on the information provided by the vision observation means (441). In general, various forms of recognition information such as serial number, barcode, QR code, text or picture-written specification information are attached to or written on the outer surface of the hydrogen charging container (2), and various charging-related information such as charging pressure, number of charging times, and lifespan of the corresponding hydrogen charging container (2) are entered into this recognition information. However, there is a concern that various safety accidents may occur during hydrogen charging due to users who do not check this information or users who incorrectly enter it. Therefore, the specification recognition module (442), as illustrated in FIG. 4, checks recognition information such as serial number, barcode, QR code, text or picture-written specification information of the hydrogen charging container (2) from the information provided by the vision observation means (441) and provides charging-related specification information obtained therefrom.

[0050] The above-mentioned external shape recognition module (443) is configured to provide charging-related external shape information for the hydrogen charging container by confirming the external shape of the hydrogen charging container based on the information provided by the vision observation means (441). The size of the hydrogen charging container (2), i.e., the volume information, can be important auxiliary information for determining the amount of hydrogen that can be charged into the hydrogen charging container (2) or the charging pressure. By obtaining and providing such information, it is possible to provide accurate information necessary to control safe charging operations even when the barcode of the hydrogen charging container (2) is damaged, information such as the barcode is incorrectly entered, or information is incorrectly entered due to a user's mistake.

[0051] The above-mentioned external condition recognition module (444) is configured to provide charging-related external condition information for the hydrogen charging container by checking the external condition of the hydrogen charging container based on the information provided by the vision observation means (441). Generally, the hydrogen charging container (2) is made of a composite material. If a hydrogen charging container (2) made of such a material has a crack, scratch, dent, or other slight change or damage to its external condition, the internal pressure strength of the hydrogen charging container (2) may rapidly decrease, which increases the risk of a safety accident occurring during the hydrogen charging process. Therefore, through the information on the external condition of the hydrogen charging container acquired and provided through the above-mentioned external condition recognition module (444), it is possible to provide information that enables safe charging operations to be performed despite failure to check the condition of the hydrogen charging container (2) due to the user's carelessness, etc.

[0052] The first charging control means (445) is configured to control the charging process within the charging unit (40) based on the information provided from the specification recognition module (442), the appearance recognition module (443), and the appearance condition recognition module (444). Through real-time linkage of the information provided from the specification recognition module (442), the appearance recognition module (443), and the appearance condition recognition module (444) to the control unit (70) and interaction with the control unit (70), the first charging control means (445) automatically recognizes the specifications, appearance, and appearance condition of the hydrogen charging container, which is the target of hydrogen charging, and based on the provided information, even if the user carelessly does not input or incorrectly inputs the charging pressure or number of times, or if confirmation / checking of the appearance condition of the hydrogen charging container (2) is omitted, various situations (conditions) can be automatically recognized based on the information, and necessary information can be input, corrected, or controlled.

[0053] The above specification registration module (446) is configured to register specification information for the hydrogen charging container (2) recognized by the vision observation means (441) based on text or external information written on the hydrogen charging container (2), if the specification information related to the charging is not in a database such as a server (in the present invention, the term 'database' includes a database managed by a server and transmitting and receiving information online and a database managed by a control unit (70) and transmitting and receiving information offline as well; that is, in the present invention, the database information of the control unit (70) that is already installed is utilized in various ways together with the database managed by the server (platform) online / offline). That is, in the case of a newly manufactured hydrogen charging container (2), there are cases where the corresponding specification information is missing from the database. If a hydrogen charging container (2) for which such specification information is not in the database is identified by the vision observation means (441), the necessary specification information cannot be obtained through the barcode or QR code of the container. However, even in this case, the minimum information such as the charging pressure and number of times for the container can be confirmed / obtained through the text or external information written on the outer surface of the hydrogen charging container (2). In the specification registration module (446), based on the text or external information written on the hydrogen charging container (2) recognized by the vision observation means (441), the charging-related specification information for the hydrogen charging container (2) can be registered in the device so that it can be utilized for safe charging operations, or new specification information for the container can be additionally registered in the database.

[0054] The above specification modification module (447) is configured to modify the specification information for the hydrogen charging container (2) recorded in the database when the specification information recorded in the serial number, barcode, or QR code of the hydrogen charging container (2) recognized through the vision observation means (441) and the text or external information related to the specifications described in the hydrogen charging container (2) recognized by the vision observation means (441) are different from each other. That is, there may be cases where the specification information recorded in the barcode, QR code, etc. attached to the hydrogen charging container (2) is stored and operated differently from the charging-related information of the actual container, and the specification modification module (447) compares the charging-related specification information (charging pressure, number of times, etc.) of the container recorded in the serial number, barcode, or QR code of the hydrogen charging container (2) recognized by the vision observation means (441) with the text or external information related to the charging specifications recorded on the outer surface of the hydrogen charging container (2) recognized by the vision observation means (441), and if the compared information is different, the information is transmitted so that the incorrectly recorded (entered) information can be corrected, and also so that the charging operation can be performed when the correct information is confirmed.

[0055] The monitoring unit (42) is configured to perform a function of monitoring temperature changes, volume changes (changes in the external shape of the containers), etc., of a plurality of hydrogen charging containers in real time using one monitoring unit (42) during the hydrogen charging process to ensure safe charging. To this end, more specifically, the monitoring unit (42) may include an infrared observation means (421) for observing infrared rays emitted from a user's hydrogen charging container (2) accommodated in the accommodation unit (41), an infrared judgment means (422) for observing the state of the user's hydrogen charging container (2) based on the infrared observation result observed from the infrared observation means (421) and judging whether there is an abnormality, and a second charging control means (423) for controlling the charging process in the charging unit (40) based on the judgment result from the infrared judgment means (422) in conjunction with the control unit (70).

[0056] The above infrared observation means (421) is configured to observe infrared rays emitted from the user's hydrogen charging container (2) accommodated in the accommodation unit (41), and various infrared observation devices such as an infrared camera can be utilized. In the present invention, the monitoring unit (42) is characterized in that it determines whether there is an abnormality in the hydrogen gas charging process based on the state of the user's hydrogen charging container (2) during the hydrogen gas charging process. In the present specification, infrared means an electromagnetic wave having a longer wavelength than visible light, and the infrared is not limited to any wavelength that can be arbitrarily selected by a person skilled in the art for practical use in order to determine shape information of an object or temperature information. Based on this fact, the infrared observation means (421) in the present invention is characterized in that it observes infrared rays emitted from the user's hydrogen charging container (2), thereby monitoring the temperature and volume (volume) of the user's hydrogen charging container (2) in real time during the charging process, and analyzes the state value or change trend to determine whether there is an abnormality in the charging process.

[0057] The above infrared observation means (421) may include an infrared module (not shown) that transmits infrared rays emitted from the user's hydrogen charging container (2) accommodated in the receiving portion (41), an infrared detection module (not shown) that detects the infrared rays transmitted from the infrared module (not shown) and generates an electrical signal based thereon, etc., and the infrared module (not shown) means a configuration that transmits infrared rays emitted from the user's hydrogen charging container (2) accommodated in the receiving portion (41) to form an infrared image (if it corresponds to a configuration that can project the infrared image of the user's hydrogen charging container (2) onto the infrared detection module (not shown) using a lens that transmits infrared rays, a person skilled in the art can arbitrarily select and implement appropriate matters), and the infrared detection module (not shown) means a configuration that detects infrared rays and generates an electrical signal based thereon, and for this purpose, the infrared detection module (not shown) includes a detection module (not shown) that can physically or chemically respond to the projected infrared rays and the It may include a signal generation module (not shown) capable of processing an electrical signal generated by a sensation in a sensation module (not shown).

[0058] The above infrared judgment means (422) refers to a configuration that observes the state of the user's hydrogen charging container (2) based on the infrared observation result observed from the infrared observation means (421) and determines whether there is an abnormality, and for this purpose, the infrared judgment means (422) more specifically, as shown in FIG. 5, includes a position coordinate generation module (4221) that generates the position coordinates of the charging space (43), a reference coordinate generation module (4222) that identifies the user's hydrogen charging container (2) accommodated in the accommodation unit (41) as soon as the hydrogen gas charging process starts, and substitutes the shape of the identified user's hydrogen charging container (2) into the position coordinates to generate reference coordinates for the user's hydrogen charging container (2), a real-time synchronization module (4223) that synchronizes the signal for the infrared obtained from the infrared observation means (421) with the reference coordinates in real time to generate a real-time reference coordinate measurement value, and a real-time monitoring of the temperature change of the user's hydrogen charging container (2) based on the real-time reference coordinate measurement value. It may include a temperature monitoring module (4224), a volume monitoring module (4225) that monitors in real time the change in volume of the user's hydrogen charging container (2) based on the real-time reference coordinate measurement value, and an abnormality determination module (4226) that compares the temperature and volume monitored by the temperature monitoring module (4224) and the volume monitoring module (4225) with preset charging settings to determine whether there is an abnormality in the charging process.

[0059] The above-described position coordinate generation module (4221) refers to a configuration that generates position coordinates of the charging space (43). The position coordinates refer to coordinate information that can specify the shape of the charging space (43) and the position of a fixed structure such as the receiving portion (41) formed in the charging space (43), and the position coordinates may be position coordinates for a two-dimensional plane including a cross-section passing through the user's hydrogen charging container (2) among the charging space (43), or position coordinates for a three-dimensional space of the charging space (43). Meanwhile, after generating position coordinates for the charging space (43), the previously generated position coordinates can be continuously utilized without generating new position coordinates separately for the same charging space (43).

[0060] The above reference coordinate generation module (4222) refers to a configuration that identifies the user's hydrogen charging container (2) accommodated in the accommodation unit (41), and substitutes the shape of the identified user's hydrogen charging container (2) into the position coordinates to generate reference coordinates for the user's hydrogen charging container (2). Simultaneously with the start of the charging process, the reference coordinate generation module (4222) can specify the shape of the user's hydrogen charging container (2) through observation by the infrared observation means (421), convert this into coordinate information, and map it to the position coordinates. As will be described later, the charging space (43) is cooled and maintained at a constant temperature range compared to the external air temperature by the second charging control means (423). Accordingly, when the user mounts the user's hydrogen charging container (2) mounted on his / her application in the receiving portion (41) for the charging process, the user's hydrogen charging container (2) has a temperature range higher than a certain range compared to the temperature within the charging space (43), so that the presence of the user's hydrogen charging container (2) within the charging space (43) can be identified by the infrared observation means (421). This can be achieved through a known algorithm or information processing method. The user's hydrogen charging container (2) within the charging space (43) thus identified is identified by a specific closed surface determined by its shape, and the position corresponding to this specific closed surface and its interior can be coordinated. Accordingly, the reference coordinates refer to coordinates for the shape of the user's hydrogen charging container (2) mounted on the receiving portion (41) and the position corresponding to the interior thereof. The reference coordinates may be position coordinates for a two-dimensional plane including a cross-section passing through the user's hydrogen charging container (2) within the charging space (43), or position coordinates for a three-dimensional space of the charging space (43).

[0061] The above real-time synchronization module (4223) refers to a configuration that synchronizes the signal for infrared rays obtained from the infrared observation means (421) with the reference coordinates in real time to generate a real-time reference coordinate measurement value. The electrical signal for infrared rays continuously generated from the infrared observation means (421) is synchronized in real time with the reference coordinates generated in the reference coordinate generation module (4222) by the real-time synchronization module (4223). Accordingly, as the charging process continues, changes in the temperature or shape of the user's hydrogen charging container (2) are continuously measured and continuously synchronized with the reference coordinates, and such real-time measurement values ​​are referred to as real-time reference coordinate measurement values. The real-time reference coordinate measurement values ​​may include information about temperature and shape.

[0062] The above temperature monitoring module (4224) refers to a configuration that monitors the temperature change of the user's hydrogen charging container (2) in real time based on the real-time reference coordinate measurement value in conjunction with the above abnormality judgment module (4226).

[0063] The above volume monitoring module (4225) refers to a configuration that monitors in real time the volume change of the user's hydrogen charging container (2) based on the real-time reference coordinate measurement value in conjunction with the above abnormality judgment module (4226). The volume change of the user's hydrogen charging container (2) can be monitored through a process of measuring and calculating the change in the shape of the observed container (2), and this can be achieved by a known algorithm or information processing method.

[0064] The above abnormality determination module (4226) refers to a configuration that compares the temperature and volume monitored by the temperature monitoring module (4224) and the volume monitoring module (4225) with preset charging settings to determine whether there is an abnormality in the charging process. First, in the case of the temperature of the user's hydrogen charging container (2), if the temperature of the user's hydrogen charging container (2) monitored by the temperature monitoring module (4224) deviates from the reference range, this can be determined as an abnormality. Meanwhile, in the case of the change in the volume of the user's hydrogen charging container (2), if the change in the volume of the user's hydrogen charging container (2) monitored by the volume monitoring module (4225) deviates from the reference range and expands, this can be determined as an abnormality. In the case of the change in volume, the change in the volume of the container (2) identified at a specific point in time during the charging process can be determined based on a value obtained by differentiating the change in volume by the time up to the specific point in time compared to the container (2) in the initial state corresponding to the reference coordinates. If the volume expands beyond the reference range or the expansion rate becomes rapid based on the volume change amount, this can be determined as an abnormal situation. The value corresponding to the reference range of the temperature or volume corresponds to the charging setting value, which can be set by selecting an appropriate value by the administrator. Meanwhile, the abnormality determination module (4226) can transmit a signal corresponding to 'normal' when it determines that the charging process is normally performed, and a signal corresponding to 'abnormal' when it determines that an abnormality occurs due to the above-described process, to the second charging control means (423).

[0065] The second charging control means (423) refers to a configuration that controls the charging process within the charging unit (40) based on the judgment result from the infrared judgment means (422), and for this purpose, more specifically, as illustrated in FIG. 6, the second charging control means (423) is characterized by including an external temperature measurement module (4231) that observes the external atmospheric temperature, a charging unit temperature control module (4232) that controls the temperature within the charging space (43) based on the external atmospheric temperature observed by the external temperature measurement module (4231), and a control unit linkage module (4233) that transmits the judgment result from the infrared judgment means (422) to the control unit (70) and controls the charging process within the charging unit (40) by a command from the control unit (70).

[0066] The above external temperature measurement module (4231) refers to a configuration that observes the ambient temperature outside the hydrogen gas charging device (1) and transmits it to the charging unit temperature control module (4232) and the control unit linkage module (4233).

[0067] The above charging unit temperature control module (4232) refers to a configuration that controls the temperature within the charging space (43) based on the external air temperature observed by the external temperature measurement module (4231). As described above, the temperature within the charging space (43) can be detected by the infrared observation means (421) or by an additional temperature sensor, and the temperature within the charging space (43) is controlled by comparing the temperature of the charging space (43) measured in this way with the external air temperature. This is to more easily identify the charging space (43) or a structure formed in the charging space (43) and the hydrogen charging container (2) of the user to be charged through infrared observation at the beginning stage of the charging process, as described above. The charging unit temperature control module (4232) can control the temperature within the charging space (43) to be cooled and maintained to preferably 10°C or lower than the external air temperature, and more preferably 20°C or lower.

[0068] The above control unit linkage module (4233) means a configuration that transmits the judgment result of the infrared judgment means (422) to the control unit (70) and controls the charging process in the charging unit (40) by the command of the control unit (70). As described above, the abnormality judgment module (4226) monitors the temperature or volume of the user's hydrogen charging container (2) during charging in real time and determines whether it is 'normal' or 'abnormal' based on the result. When a signal for such judgment is received from the abnormality judgment module (4226), it is transmitted to the control unit (70). When the control unit (70) commands control of the charging process based on this, the control unit linkage module (4233) can perform control such as stopping the charging process, terminating the charging process, and adjusting the flow rate of hydrogen gas introduced into the charging unit (40) according to the command of the control unit (70).

[0069]

[0070] In the above, the applicant has described various embodiments of the present invention, but such embodiments are only examples of implementing the technical idea of ​​the present invention, and any change or modification that implements the technical idea of ​​the present invention should be interpreted as falling within the scope of the present invention.

Claims

1. Hydrogen gas guide line providing a path for hydrogen gas to move; A pressurized section for compressing hydrogen gas; A storage unit that receives and stores hydrogen gas; A charging unit that accommodates a user's hydrogen charging container and supplies hydrogen gas to the user's hydrogen charging container; A cooling unit connected to the hydrogen gas guide line or charging unit and performing cooling of the hydrogen gas or the charging unit; and It includes a control unit that controls the hydrogen gas charging process in the pressurization unit, storage unit, cooling unit and charging unit; A mobile hydrogen gas charging device characterized in that the charging unit includes a charging space formed therein, one or more receiving portions formed in the charging space and accommodating the user's hydrogen charging container, a vision recognition portion that recognizes and analyzes the state of the hydrogen charging container accommodated in the receiving portion and provides charging-related control information, and a monitoring portion that monitors the charging state of the hydrogen charging container accommodated in the receiving portion.

2. In paragraph 1, The above vision recognition unit includes a vision observation means for observing the state of a hydrogen charging container accommodated in the accommodation unit, A mobile hydrogen gas charging device characterized in that the above-mentioned vision observation means obtains and provides multiple images or continuous image information about the process of receiving a hydrogen charging container in the receiving portion or the state of receiving a hydrogen charging container in the receiving portion in an image or video format.

3. In paragraph 2, The above vision recognition unit further comprises a specification recognition module that provides charging-related specification information for the hydrogen charging container by confirming recognition information such as serial number, barcode, QR code, text or picture specification information of the hydrogen charging container based on information provided by the vision observation means, an appearance recognition module that provides charging-related exterior information for the hydrogen charging container by confirming the exterior of the hydrogen charging container based on information provided by the vision observation means, an appearance status recognition module that provides charging-related exterior status information for the hydrogen charging container by confirming the exterior status of the hydrogen charging container based on information provided by the vision observation means, and a first charging control means that controls a charging process in the charging unit based on information provided by the specification recognition module, the exterior recognition module and the exterior status recognition module.

4. In paragraph 3, The above vision recognition unit further comprises a specification registration module that registers specification information for a hydrogen charging container based on text or external information written on a hydrogen charging container recognized by the vision observation means when there is no specification information related to charging in a database for the hydrogen charging container recognized by the vision observation means, and a specification modification module that modifies specification information for the hydrogen charging container recorded in a database when the specification information written in the serial number, barcode, or QR code of the hydrogen charging container recognized by the vision observation means and the specification-related text or external information written on the hydrogen charging container recognized by the vision observation means are different from each other. A mobile hydrogen gas charging device characterized in that the above vision recognition unit further comprises a specification registration module that registers specification information for a hydrogen charging container based on text or external information written on a hydrogen charging container recognized by the vision observation means when there is no specification information related to charging in a database for the hydrogen charging container recognized by the vision observation means, and a specification modification module that modifies specification information for the hydrogen charging container recorded in a database when there is a difference between the specification information written in the serial number, barcode, or QR code of the hydrogen charging container recognized by the vision observation means and the specification-related text or external information written on the hydrogen charging container recognized by the vision observation means.

5. In paragraph 1, A mobile hydrogen gas charging device characterized in that the monitoring unit includes an infrared observation means for observing infrared rays emitted from a user's hydrogen charging container accommodated in the receiving unit, an infrared judgment means for observing the state of the hydrogen charging container during the hydrogen charging process and judging whether there is an abnormality based on the infrared observation result observed from the infrared observation means, and a second charging control means for controlling the charging process within the charging unit based on the judgment result from the infrared judgment means in conjunction with the control unit.

6. In paragraph 5, The above infrared observation means includes an infrared module that transmits infrared rays emitted from a user's hydrogen charging container accommodated in the accommodation unit, and an infrared detection module that detects infrared rays transmitted from the infrared module and generates an electrical signal based on the infrared rays. The infrared judgment means includes a position coordinate generation module that generates position coordinates of the charging space, a reference coordinate generation module that identifies the user's hydrogen charging container accommodated in the accommodation unit and inputs the shape of the identified user's hydrogen charging container into the position coordinates to generate reference coordinates for the user's hydrogen charging container, a real-time synchronization module that synchronizes the infrared observation result observed from the infrared observation means with the reference coordinates in real time to generate a real-time reference coordinate measurement value, a temperature monitoring module that monitors in real time a temperature change of the user's hydrogen charging container based on the real-time reference coordinate measurement value, a volume monitoring module that monitors in real time a volume change of the user's hydrogen charging container based on the real-time reference coordinate measurement value, and an abnormality judgment module that compares the temperature and volume monitored by the temperature monitoring module and the volume monitoring module respectively with preset charging setting values ​​to determine whether there is an abnormality in the charging process. A mobile hydrogen gas charging device characterized in that the second charging control means includes an external temperature measurement module that observes the external atmospheric temperature, a charging unit temperature control module that controls the temperature within the charging space based on the external atmospheric temperature observed by the external temperature measurement module, and a control unit linkage module that transmits the judgment result from the infrared judgment means to the control unit and controls the charging process within the charging unit by a command from the control unit.

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