JP7161766B2 - fast charging station - Google Patents

Description

TECHNICAL FIELD The present invention relates to a quick charging station that enables quick charging of electric mobility such as an electric vehicle (EV).

From the point of view of environmental problems, the spread of electric mobility, especially electric vehicles, is being promoted. In order to promote the popularization of electric vehicles, it is necessary to popularize quick charging facilities that enable quick additional charging of electric vehicles.

On the other hand, in order to charge an electric vehicle to 80% or more from the grid power supply, it generally takes more than ten hours for normal charging at 100V using low-voltage power receiving equipment, and more than several hours for normal charging at 200V. becomes. Rapid charging by high-voltage power receiving equipment of 50 kW or more can be charged in about 15 to 30 minutes, but installation of high-voltage power receiving equipment is costly.

On the other hand, in order to enable quick charging even in mountainous areas where there is no power receiving equipment without installing or reinforcing high voltage power receiving equipment, it was proposed to connect a diesel engine-driven generator to a quick charger. (Patent Document 1).

In addition, a power supply capable of supplying electric power to an electric vehicle from a grid power source, a renewable energy generation unit connected to a power storage unit, a hydrogen generation unit using a fuel cell fueled by hydrogen gas or an internal combustion engine. A system has been proposed (Patent Document 2).

Utility Model Registration No. 3195806 Japanese Patent No. 6005503

However, Patent Document 1 does not describe how light oil for driving a diesel engine generator is stored in the generator. If gas stations cannot supply diesel engine generators with light oil, quick chargers will not work either.

Further, according to the power supply system of Patent Document 2, even if the power supply from the grid power source is interrupted in the event of a disaster, it is possible to use the power from the renewable energy power generation unit or the hydrogen power generation unit provided with the power storage unit. ing. However, even if a power storage unit is provided, the power storage unit stores power generated by renewable energy. At the same time, it is difficult to stably perform rapid charging. In addition, since tank trucks and pipelines are used as means for externally supplying hydrogen to the hydrogen power generation unit, areas where hydrogen gas can be supplied to the hydrogen power generation unit are limited. Therefore, it is feared that sufficient hydrogen to be used in the hydrogen power generation unit cannot be secured in some regions, even if it is not in the event of a disaster.

On the other hand, the present invention enables high-capacity quick charging using power generated by a generator using fuel gas even in areas where the road network is not developed or where the road network has been severed due to a disaster or the like. It is an object of the present invention to enable, for example, a plurality of electric vehicles to be reliably rapidly charged.

In equipping a quick charging station for quick charging of electric mobility with an internal combustion power generator, the inventor of the present invention provides flexibility in the type of fuel gas that can be used in the internal combustion power generator, and uses it in the internal combustion power generator. The present invention has been completed by conceiving that the above-mentioned problem can be achieved by storing the fuel gas to be used as a mobile cylinder and storing the electric power supplied from the internal combustion generator in the electric storage device.

That is, the present invention is a rapid charging station that rapidly charges electric mobility,
a fuel gas storage unit storing a plurality of types of fuel gas;
an internal combustion power generator capable of switching and supplying multiple types of fuel gas;
a regulator provided between the internal combustion generator and the fuel gas storage;
an electricity storage device that stores electric power supplied from an internal combustion generator; and
having a rapid charger connected to an accumulator,
A fuel gas reservoir provides a rapid charging station with a mobile cylinder of fuel gas.

The quick charging station of the present invention has an internal combustion power generator that can switch and supply a plurality of types of fuel gas, and has flexibility in the fuel gas that drives the internal combustion power generator. Even if it cannot be supplied to the generator, it becomes possible to drive the internal combustion generator with another fuel gas.

In addition, since the fuel gas for driving the internal combustion power generator is stored in a mobile cylinder, a desired amount of fuel gas can be easily stockpiled at the quick charging station, and the fuel gas can be used in areas where road networks are not developed or disasters. It becomes easy to replenish the fuel gas to the quick charging station even in areas where the road network is severed.

FIG. 1A is a schematic configuration diagram of a quick charging station of an embodiment. FIG. 1B is a schematic configuration diagram of a modification of the quick charging station of the embodiment. FIG. 1C is a schematic configuration diagram of a modification of the quick charging station of the embodiment. FIG. 2 is a configuration diagram of a bundle-type mobile cylinder that supplies fuel gas to an internal combustion power generator in the quick charging station of the embodiment.

The present invention will be described in detail with reference to the drawings. In each figure, the same reference numerals denote the same or equivalent components.

(overall structure)
FIG. 1 is a schematic configuration diagram of a quick charging station 1A according to one embodiment of the present invention. This quick charging station 1A is equipped with a quick charger 2 for quick charging an electric vehicle, and functions as an EV station. A plurality of quick chargers 2 are provided, and each quick charger 2 is connected to a storage battery 3 .

The quick charging station 1A has an internal combustion power generator 4 as a power source, and the internal combustion power generator 4 can generate power even if a plurality of types of fuel gases are switched and supplied. On the other hand, the quick charging station 1A may be provided with a fuel cell 5 if necessary. It is preferable to provide a connection with a system power supply so that electric power can be stored.

(internal combustion generator)
A quick charging station 1A of the present invention is equipped with an internal combustion power generator 4 . The internal combustion generator 4 imposes a greater environmental load than a fuel cell, but can be installed at a low cost. Further, the fuel gas used in the internal combustion power generator 4 does not need to be as high in purity as the fuel gas used in the fuel cell 5 . Therefore, it is preferable to use the internal combustion power generator 4 as the power source of the quick charging station in order to popularize the quick charging station and thereby support the popularization of electric mobility such as electric vehicles.

Examples of the internal combustion power generator 4 include a rotary engine, a reciprocating engine, a gas turbine, and the like. Among them, the rotary engine is preferable from the point of being easily compatible with various fuel gases, and the reciprocating engine is preferable from the point of obtaining a high power generation amount.

The amount of power generated by the internal combustion generator 4 may be, for example, an output of 3 to 100 kW, more preferably 3 to 200 kW.
A plurality of types of fuel gas can be switched and supplied to the internal combustion power generator 4 .

(fuel gas)
Examples of the fuel gas supplied to the internal combustion power generator 4 include hydrogen gas such as off-site hydrogen gas, city gas, propane gas, biogas, etc. The hydrogen gas is provided as a high-pressure hydrogen cylinder. may be provided as a hydrogen storage alloy.

These fuel gases are stored in the fuel gas storage unit 7 by mobile cylinders. Here, the mobile cylinder refers to a movable high-pressure gas cylinder, and each high-pressure gas cylinder may be movable. may A desired amount of fuel gas can be easily stored in the quick charging station 1A by providing the fuel gas as a mobile cylinder. A plurality of mobile cylinders may be stockpiled for each fuel gas. Hydrogen storage alloys that do not violate the High Pressure Gas Safety Law are preferable for the portable hydrogen cylinder. As such a hydrogen storage alloy, for example, a hydrogen storage alloy available from The Japan Steel Works, Ltd. can be used.

In addition, the mobile cylinder itself can be easily transported. Therefore, when the fuel gas in the mobile cylinder becomes empty, by replacing the empty mobile cylinder with a full one, pipeline operation can be performed without special vehicles such as tank trucks. The fuel gas storage unit 7 can be easily replenished with fuel gas even if is not installed. In particular, if the bundle is used as a mobile cylinder, the fuel gas can be stored and transported more easily.

At the quick charging station 1A, it is preferable to switch between two or more of the fuel gases described above. In the event of a disaster, there is concern that replenishment may or may not be possible depending on the type of fuel gas. station can be activated.

On the other hand, in the internal combustion power generator 4, the optimum flow rate differs depending on the type of fuel gas. Therefore, in order to allow multiple types of fuel gas to be used in a common internal combustion generator 4, as shown in FIG. A regulator 9 is preferably provided to regulate the flow of fuel gas to the power generator 4 .

Further, as shown in FIG. 2, when a cylinder bundle is provided as the movable cylinder 8 for each fuel gas, a switching valve 10 is provided between the cylinder bundle and the regulator 9, and the pressure of the fuel gas in the cylinder bundle 8 is changed. is preferably monitored by the pressure gauge 11 at all times. As a result, when the pressure measured by the pressure gauge 11 of the cylinder bundle 8 supplying the fuel gas to the internal combustion power generator 4 falls below a predetermined pressure, the internal combustion power generator 4 is discharged from the other standby cylinder bundle 8. The switching valve 10 can be switched so that the fuel gas is supplied to . It is preferable that the pressure gauge 11 can be constantly monitored by wireless operation, and the switching operation of the switching valve 10 is preferably controlled automatically based on the pressure measured by the pressure gauge 11 .

On the other hand, when the flow rate is automatically adjusted according to the type of fuel gas, one regulator 9 may be provided for a plurality of types of fuel gas, as shown in FIG. 1B.

As the fuel gas, hydrogen gas may be generated by electrolyzing water with renewable energy 13 generated using wind power, sunlight, or the like, and supplied to the internal combustion power generator 4 . Also, in areas where a city gas pipe network has been established, a connection valve to the city gas pipe may be provided in addition to the mobile cylinder.

(Fuel cell)
Obtaining electric power from the fuel cell 5 can reduce the environmental load compared to obtaining electric power from the internal combustion generator 4 . A plurality of types of fuel gases can be switched and supplied to the fuel cell 5 as well. However, the fuel cell 5 has a higher introduction cost and a shorter life than the internal combustion power generator 4, and the hydrogen gas used as fuel gas in the fuel cell is less than the hydrogen gas used in the internal combustion power generator 4. High purity is required. Therefore, in the present invention, the fuel cell 5 is provided as required.

As the hydrogen gas to be supplied to the fuel cell 5, on-site hydrogen gas obtained by passing the above-mentioned city gas, propane gas, or biogas through the reformer 12 can be used. process. In this case, as the reformer 12, one used in a known on-site hydrogen station can be used. can. As the hydrogen gas to be supplied to the fuel cell 5, hydrogen gas obtained by electrolyzing water using renewable energy may be used, or off-site hydrogen gas may be used.

(system power supply)
The system power supply 6 may be either a high-voltage lead-in or a low-voltage lead-in, and it is not always necessary to use the system power supply 6 where there is no power receiving equipment. However, in a place where there is power receiving equipment as existing equipment, it is preferable to use the power receiving equipment and store electric power in the battery 3 . In particular, in a place where there is a high-voltage power receiving facility, it is preferable to connect the system power supply 6 and the storage battery 3 via an A/D converter in order to shorten the charging time.

(Renewable energy)
In the present invention, renewable energy 13 may be used as the power source and stored in the battery 3 . As the renewable energy 13, wind power generation, solar power generation, and the like can be mentioned.

However, since the amount of power generated by the renewable energy 13 is not constant and requires large-scale equipment, it is preferable to use renewable energy in the present invention when existing equipment can be used.

(capacitor)
As the storage battery 3, a lithium ion storage battery, a lead storage battery, a sodium sulfur storage battery, an all-solid battery, a lithium air battery, a flywheel, or the like can be used. From the viewpoint of enabling rapid charging of electric mobility such as multiple electric vehicles, it is preferable to provide a large-capacity storage battery 3, for example, a storage battery of 10 to 200 kWh, more preferably 150 to 200 kWh. be able to. From the same point of view, it is preferable to provide a plurality of capacitors 3. For example, as shown in FIG. 1A, a capacitor 3 is connected to each of the plurality of quick chargers 2. On the other hand, if the charging capacity of the charger 3 is sufficiently large, one battery 3 may be connected to a plurality of quick chargers 2 as shown in FIG. 1C.

The present invention has been described above based on the embodiments of the present invention. It includes various aspects provided as a mobile cylinder.

1A, 1B, 1C Quick charging station 2 Quick charger 3 Battery 4 Internal combustion generator 5 Fuel cell 6 System power supply 7 Fuel gas storage unit 8 Mobile cylinder, cylinder bundle 9 Regulator 10 Switching valve 11 Pressure gauge (P)
12 reformer 13 renewable energy

Claims (6)

A quick charging station for quick charging of electric mobility,
a fuel gas storage unit in which the fuel gas is stored as a mobile cylinder;
A hydrogen generator that electrolyzes water using renewable energy using wind power or sunlight to generate hydrogen gas,
an internal combustion power generator capable of switching and supplying fuel gas stored in a mobile cylinder and hydrogen gas generated in a hydrogen generator;
a regulator provided between the internal combustion generator and the fuel gas storage;
an electricity storage device that stores electric power supplied from an internal combustion generator; and
A fast charging station with a fast charger connected to an accumulator. 2. The rapid charging station according to claim 1, wherein the fuel gas is selected from hydrogen gas, city gas, propane gas and biogas. 3. A rapid charging station according to claim 1 or 2, wherein the mobile cylinders are bundles. 4. The rapid charging station according to any one of claims 1 to 3, comprising a plurality of rapid chargers and a plurality of capacitors. The rapid charging station according to any one of claims 1 to 4, comprising a fuel cell to which fuel gas stored in a mobile cylinder is switched and supplied. The rapid charging station according to any one of claims 1 to 5, wherein the electric mobility is an electric vehicle.

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