JP2020005495A - Quick charger and quick charging system - Google Patents

Abstract

To provide a quick charger and a quick charging system that even when rated output capacity of a single quick charger is lower than maximum output capacity acceptable to a capacitor, are capable of performing quick charging with the acceptable maximum output capacity.SOLUTION: A quick charger 3 for quickly charging a capacitor 15 mounted on a plug-in type vehicle 9 comprises: a DC power supply unit 17; a power supply control unit 19; a power supply plug 13; a communication unit 23; a supply output capacity determination unit 25; a power supply changeover circuit 27; an external power reception unit 31; and an additional power adder circuit 33. The power supply control unit comprises a power supply abnormality determination unit 20 for determining whether or not the DC power supply unit can normally output DC power. The additional power adder circuit has a function that when the power supply abnormality determination unit determines abnormality of the DC power supply unit, supplies additional DC power to the capacitor when it is determined by the supply output capacity determination unit that additional DC power enables security of required output capacity.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rapid charging device and a rapid charging system for rapidly charging a battery mounted on a plug-in type vehicle.

  In recent years, compared to a conventional vehicle running by an internal combustion engine that generates power using gasoline as a fuel, a vehicle running using an electric motor that emits less greenhouse gas such as carbon dioxide (for example, an electric vehicle, Plug-in hybrid vehicles, electric motorcycles, etc., hereafter referred to as "electric vehicles, etc.") are becoming widespread. Since electric vehicles and the like use the energy stored in a battery such as a secondary battery mounted thereon as an energy source, it is necessary to charge the mounted battery using a charging device. In addition, there are ships such as ships that use electric motors, and airplanes such as drones that fly in the sky (hereinafter, the term “vehicle” includes not only vehicles traveling on land but also ships, airplanes, and the like). .

  Charging of the storage battery has a disadvantage that it takes more time than charging gasoline. In order to enable quick charging that solves this drawback, electric vehicles and the like corresponding to a larger output capacity and a rapid charging device having a high output capacity corresponding to the electric vehicle have been developed and put into practical use. For example, in the current CHAdeMO standard promoted by the CHAdeMO (registered trademark) Council, DC power up to 62.5 kW is standardized, and a rapid charging device having a rated output of 20 kW to 50 kW has been put to practical use. . When the quick charging device is installed, an appropriate device is selected and installed according to the capacity of the electrical equipment at the installation location.

  If the output capacity (eg, 30 kW) of the quick charging device is less than the maximum allowable output capacity (eg, 50 kW) of an electric vehicle or the like, the scheduled quick charging cannot be performed, and the charging time may be long. . Further, recently, development and commercialization of an electric vehicle or the like capable of quick charging with a high output capacity exceeding the above-mentioned standard, such as 100 kW, is also progressing. In order to cope with an electric vehicle or the like capable of quick charging with a high output capacity as described above, it is necessary to change the quick charging device side so that high output is also possible, but in order to install the quick charging device, However, it is not easy because the contract power must be reviewed and the capacity of the electrical equipment at the installation location must be considered.

  2. Description of the Related Art Conventionally, there is a system that cooperates with another charging device and performs charging by supplementing the insufficient DC power when the DC power that the charging device can output is insufficient (Japanese Patent Application Laid-Open No. 2013-192310). [Patent Document 1]).

JP 2013-192310 A

  However, the system of Patent Literature 1 is intended for a type of charging an electric vehicle or the like using a secondary battery built in each charging device, and compensates for a shortage of output capacity of the built-in secondary battery. Not just. Therefore, the output capacity that can be output by each charging device does not exceed the output capacity that can be output by one built-in secondary battery.

  SUMMARY OF THE INVENTION It is an object of the present invention to perform quick charging with an acceptable maximum output capacity of an electric vehicle or the like even when the rated output capacity of a single quick charging device is less than the maximum output capacity of a battery such as an electric vehicle. It is an object of the present invention to provide a quick charging device and a quick charging system that are capable of performing the following.

  Another object of the present invention is to provide a quick charging device and a quick charging system having redundancy that can perform charging even when a DC power supply unit constituting the quick charging device does not operate due to a failure or the like. .

  A quick charging device according to the present invention includes a DC power supply unit, a power supply control unit that controls DC power output from the DC power supply unit in accordance with a control command, and a power supply control unit that is connected to a plug-in connector of a plug-in type vehicle. One or more power supply plugs for supplying DC power controlled by the plug-in type vehicle to the power storage device, a communication unit that communicates with at least the plug-in type vehicle to obtain power storage information of the power storage device, A supply output capacity determination unit for determining a maximum output capacity that can be accepted by the battery based on the obtained storage information; and a DC controlled by a power supply control unit to a power plug according to the maximum output capacity determined by the supply output capacity determination unit. A power supply switching circuit that supplies power, an external power receiving unit that receives DC power from another quick charging device, and a supply output capacity determination unit that satisfies the maximum output capacity only with DC power. When additional power is received from another quick charging device, additional DC power is secured by adding the additional DC power to the DC power output from the power supply switching circuit to secure the output capacity to be supplied. And a circuit. According to the quick charging device of the present invention, because of this configuration, if the DC power of the single quick charging device alone does not reach the maximum output capacity, additional DC power is received from another quick charging device. However, it is possible to secure the output capacity necessary for supply. Therefore, it is possible to perform quick charging with an acceptable maximum output capacity of an electric vehicle or the like only by changing the quick charging device without changing the capacity or the like of the electric equipment.

  It goes without saying that the quick charging device may be provided with an external power supply unit that outputs DC power to another quick charging device. With this configuration, the external power receiving unit of one quick charging device and the external power feeding unit of another quick charging device are electrically connected to construct a quick charging system including a plurality of quick charging devices. This makes it possible for any of the quick charging devices in the system to perform quick charging with additional DC power added.

  Means for electrically connecting an external power supply unit that outputs DC power to another quick charging device and an external power receiving unit that receives DC power to each other are optional. For example, an external power supply unit that outputs DC power to another quick charging device and an external power receiving unit that receives DC power may be electrically connected to each other by using a dedicated link cable. In this case, a manual switch for controlling energization may be provided between the external power supply unit and the external power receiving unit. This makes it possible to easily stop power supply between the quick charging devices when high output is not required. Further, the power supply plug may be configured to also serve as the external power supply unit. In this case, if a connector for inserting and fixing a power plug into the external power receiving portion of the quick charging device is provided, by inserting the power plug of another quick charging device into the connector of one quick charging device. , A quick charging system can be easily constructed. Further, when each of the quick charging devices is a multiple plug type quick charging device having a plurality of power plugs, one of the power plugs of one quick charging device is used as an external power supply unit, and the other quick charging device is used. One of the power plugs of the device may be used as an external power receiving unit, and the two power plugs may be connected to each other to form a rapid charging system.

  When additional DC power is output, the power plug is more loaded than usual, so it is desirable that the power plug has a capacity to withstand high output. costly. Therefore, in the case of a multiple plug type, at least one of the plurality of power plugs may have a capacity capable of supplying power obtained by adding DC power and additional DC power. In this case, it is not necessary to make all the power plugs of high capacity, and the cost can be reduced.

  When an abnormality occurs in the DC power supply unit, the quick charging device cannot perform normal charging. Therefore, the power supply control unit of the quick charging device of the present invention includes a power supply abnormality determination unit that determines whether the DC power supply unit can normally output DC power. When the abnormality of the power supply unit is determined, when the supply output capacity determination unit determines that the required output capacity can be secured by the additional DC power, a function of supplying the additional DC power to the battery may be further provided. . With this configuration, when an abnormality occurs in the DC power supply unit, it is possible to perform redundancy by using the DC power supply unit of another quick charging device to perform charging.

  The additional power addition circuit uses another quick-charging device while charging the plug-in type vehicle and charging only DC power without receiving additional DC power. It may be configured to receive additional DC power from another quick charging device when the completion of the charging is detected, and to add the additional DC power to the DC power to secure the output capacity. . With this configuration, even when another quick charger is charging at the start of charging and additional DC power cannot be used, additional DC power is used as soon as charging of the other quick charger is completed. And charging can be performed efficiently.

  The additional power addition circuit connects the plug-in type vehicle to another power plug or one or more power plugs of another quick charging device while charging by adding additional DC power. , The addition of the additional DC power may be stopped, and the charging may be continued only with the DC power. With this configuration, even when charging is performed by adding additional DC power to DC power, charging of the plug-in type vehicle is performed in parallel when another plug-in type vehicle comes to charge. You can do so.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a quick charging system in which a quick charging device according to a first embodiment is combined. It is a block diagram of a quick charging device of a 1st embodiment. It is a flowchart which shows the charge control by the quick charge system which combined the quick charge device of 1st Embodiment. 9 is a flowchart of charging control of the rapid charging system executed until charging is completed when power is supplied only by DC power from the DC power supply unit. It is a flowchart of the charge control of the quick charge system performed until it completes charging, when shifting to "cooperation operation mode". It is the schematic which shows the quick charging system which combined the quick charging device of 2nd Embodiment. It is the schematic which shows the quick charging system which combined the quick charging device of 3rd Embodiment. It is a block diagram of a quick charging device of a third embodiment. It is the schematic which shows the quick charging system which combined the quick charging device of 3rd Embodiment. It is the schematic which shows the quick charging system which combined the quick charging device of 4th Embodiment. It is a block diagram of a quick charging device of a fourth embodiment.

  Hereinafter, the rapid charging device and the rapid charging system of the present invention will be described in detail with reference to the drawings.

<First embodiment>
[Configuration of quick charging system]
FIG. 1 is a conceptual diagram showing a quick charging system 1. As shown in FIG. 1, the quick charging system 1 includes two quick charging devices 3, 3 '. The two quick charging devices 3, 3 ′ are connected to each other via a connection cable 5 via a connection cable 5. Power plugs 13, 13 'connected to the plug-in connector 11 of the plug-in type vehicle 9 extend from the quick charging devices 3, 3', respectively. The electric power output from the quick charging devices 3 and 3 ′ via the power plugs 13 and 13 ′ charges the battery 15 of the plug-in type vehicle 9. The rated output of each of the quick charging devices 3, 3 'of the present embodiment is 30 kW. The power plug 13 can output 50 kW, and the power plug 13 ′ can output 30 kW. In this embodiment, only the power plug 13 has a high capacity in order to reduce the cost. Of course.

  The plug-in type vehicle 9 is a vehicle that runs using an electric motor such as an electric vehicle (EV), a plug-in hybrid vehicle, or an electric motorcycle, and charges the mounted battery 15 by receiving power from an external power supply. Type vehicle. The battery 15 may be a large-capacity capacitor such as a lithium-ion capacitor in addition to a secondary battery such as a lead-acid battery, a lithium-ion battery, or a nickel-metal hydride battery.

  In the fast charging system 1 of the present embodiment, the normal operation is performed in the “normal operation mode” in which the quick charging devices 3 and 3 ′ operate as independent quick charging devices at normal times. When a plug-in type vehicle 9 (e.g., 50 kW) whose output capacity exceeds the rated output (30 kW) of the quick charging device 3 is connected to the power plug 13, additional DC power is received from the quick charging device 3 ', It is configured to switch to “cooperative operation mode” in which additional DC power is added to normal DC power to secure output capacity. Furthermore, the quick charging system 1 of the present embodiment receives DC power from the other one of the quick charging devices 3 and 3 ′ when an abnormality occurs in one of the DC power supply units of the quick charging devices 3 and 3 ′. It also has a "redundant operation mode" to secure output capacity.

  Since the quick charging devices 3 and 3 'have the same configuration except for the power plug, the configuration of one quick charging device 3 will be described below, and the description of the other quick charging device 3' will be omitted. I do. When referring to the components of the quick charging device 3 ′, a symbol “′” is added to the symbol assigned to the components of the quick charging device 3.

[Configuration of quick charging device]
FIG. 2 is a block diagram of the quick charging device 3. The quick charging device 3 includes a DC power supply unit 17, a power supply control unit 19, a command generation unit 21, a communication unit 23, a supply output capacity determination unit 25, and a power supply switching circuit 27. In the present embodiment, further, an external power supply unit 29 that outputs the output from the power supply switching circuit 27 to another quick charging device and the DC power received by the external power receiving unit 31 are added to the output from the DC power supply unit 17. And an additional power adding circuit 33 for performing the operation.

  The DC power supply unit 17 includes a converter, a transformer, and a rectifier (not shown). The DC power supply unit 17 is controlled by the power supply control unit 19, converts AC power received from a commercial power supply into DC power, and supplies power through the additional power addition circuit 33. The power is supplied to the switching circuit 27. The power supply control section 19 includes a power supply abnormality determination section 20 for determining an abnormality of the DC power supply section 17.

  The power supply plug 13 is connected to the power supply switching circuit 27, is connected to the plug-in connector 11 of the plug-in type vehicle 9, and outputs the DC power output from the DC power supply unit 17 controlled by the power supply control unit 19. The additional DC power to be added as necessary is supplied to the battery 15 of the plug-in vehicle 9. The power plug 13 is also connected to the communication unit 23.

  The communication unit 23 communicates with the plug-in type vehicle 9 through a communication line provided in the power plug 13 to obtain power storage information of the power storage device 15. The power storage information includes, in addition to the voltage and temperature of the power storage device, information relating to the maximum output capacity that can be received by the power storage device. The supply output capacity determination unit 25 determines the plug connected to the power plug 13 based on the power storage information. It determines the maximum output capacity that power storage unit 15 of in-type vehicle 9 can accept and outputs the maximum output capacity to command generation unit 21. The communication unit 23 is also connected to the connection switch 5 and the communication unit 23 'of the other quick charging device 3' through a communication line provided in the link cable 7.

  Command generation unit 21 outputs a selection command, a selection end command, and a control command based on the power storage information obtained from communication unit 23. In the “normal operation mode”, the additional power addition circuit 33 is in a non-operating state, the power supply switching circuit 27 supplies DC power to the power plug 13 according to the selection command, and supplies DC power to the power plug 13 according to the selection end command. Stop supplying power. In the “cooperative operation mode”, the power supply switching circuit 27 ′ of the quick charging device 3 ′ supplies DC power to the external power supply unit 29 ′ according to the selection command, and the quick charging device 3 performs quick charging from the external power receiving unit 31. Upon receiving the additional DC power from the device 3 ′, the additional power adding circuit 33 enters an operating state and adds the additional DC power to the DC power from the DC power supply unit 17. Then, the power supply switching circuit 27 supplies DC power to the power plug 13 in response to the selection command, and stops supplying DC power to the power plug 13 in response to the selection end command. In the “redundant operation mode”, for example, when an abnormality occurs in the DC power supply unit 17 of the quick charging device 3, the quick charging device 3 receives an additional signal from the quick charging device 3 ′ as in the “cooperative operation mode”. Upon receiving the DC power, the power supply switching circuit 27 supplies only the additional DC power to the power plug 13 according to the selection command, and stops the supply of the DC power to the power plug 13 according to the selection end command.

[Charge control of quick charge system]
FIG. 3 is a flowchart illustrating charging control by the rapid charging system 1 according to the first embodiment.

  When the plug-in type vehicle 9 is connected to the power plug 13 of the quick charging device 3 (step ST1), first, the power supply abnormality determination unit 20 determines whether an abnormality has occurred in the DC power supply unit 17 (step ST1). Step ST2). If there is no abnormality in DC power supply unit 17, supply output capacity determination unit 25 acquires the maximum output capacity that power storage unit 15 can accept from the power storage information (step ST3). The supply output capacity determination unit 25 compares the DC power that can be output by the DC power supply unit 17 with the acquired maximum output capacity (step ST4). When it is determined that the DC power is the same as the maximum output capacity or the DC power is larger than the maximum output capacity, the rapid charging system 1 enters the “normal operation mode”, and the selection command is output from the command generation unit 21. Then, the power supply switching circuit 27 supplies DC power to the power plug 13 (step ST5).

  If it is determined that the DC power is smaller than the maximum output capacity, the command generator 21 turns on the connection switch 5 and sends the command from the communication unit 23 to the command generator 21 ′ of the quick charging device 3 ′. To make an inquiry (step ST6). When it is confirmed that the charging is not performed by the quick charging device 3 ′ and that no abnormality occurs in the DC power supply unit 17 ′, the quick charging system 1 shifts to the “cooperative operation mode”. In the “cooperative operation mode”, the command generation unit 21 of the quick charging device 3 outputs a command to the power control unit 19 and the additional power addition circuit 33, and the command generation unit 21 ′ of the quick charging device 3 ′ A command is output to the power control unit 19 'and the power supply switching circuit 27' (power receiving command / step ST7). The additional power adding circuit 33 prepares to add the additional DC power from the external power receiving unit 31 to the DC power from the DC power supply unit 17 and output the added power (step ST8). When the selection command is output, power supply switching circuit 27 supplies DC power to power plug 13 (step ST5).

  In step ST6, if charging is in progress in the quick charging device 3 'or an abnormality has occurred in the DC power supply unit 17', preparation is made to output only DC power from the DC power supply unit 17, and a selection command is issued. Thereby, the power supply switching circuit 27 supplies DC power to the power plug 13 (step ST5).

  In step ST2, when the power supply abnormality determination unit 20 determines that an abnormality has occurred in the DC power supply unit 17, since the quick charging device 3 cannot be charged alone, the command generation unit 21 sets the connection switch 5, the communication unit 23 makes an inquiry to the command generation unit 21 'of the quick charging device 3' (step ST9). When it is confirmed that the charging is not performed by the quick charging device 3 ′ and that no abnormality occurs in the DC power supply unit 17 ′, the quick charging system 1 shifts to the “redundant operation mode”. In the “redundant operation mode”, the command generation unit 21 of the quick charging device 3 outputs a command to the additional power addition circuit 33, and the command generation unit 21 ′ of the quick charging device 3 ′ includes a power control unit 19 ′. Then, a command is output to the power supply switching circuit 27 '(power receiving command, step ST10). The additional power addition circuit 33 prepares to output additional DC power from the external power receiving unit 31 (step ST11). When the selection command is output, power supply switching circuit 27 supplies DC power to power plug 13 (step ST5).

  In step ST9, if charging is in progress in the quick charging device 3 ', or if an abnormality has occurred in the DC power supply unit 17', charging cannot be performed in the quick charging system 1, and an error occurs. It is notified that the operation cannot be performed (step ST12).

[Additional charge control (1)]
FIG. 4 shows the quick charging system 1 which is executed until the charging is completed when it is determined that the charging is in progress in the quick charging device 3 ′ and the power is supplied only by the DC power from the DC power supply unit 17. 3 is a flowchart of charging control of FIG.

  Until the charging is completed, the quick charging device 3 monitors whether the charging of the other quick charging device 3 'is completed (steps ST13 and ST14). Upon detecting that the charging of the other quick charging device 3 'is completed, the quick charging system 1 shifts to the "cooperation operation mode", and the command generators 21 and 21' output a power receiving command (step ST15). Then, the additional DC power is added to the DC power to continue charging (steps ST16 and ST17).

[Additional charge control (2)]
FIG. 5 is a flowchart of the charging control of the rapid charging system 1, which is executed until the charging is completed when the mode is shifted to the “cooperative operation mode”.

  The rapid charging device 3 monitors whether or not another plug-in type vehicle is connected to the power plug 13 'until charging is completed (steps ST18 and ST19). Upon detecting that another plug-in type vehicle is connected to the power plug 13 ′, the command generators 21 and 21 ′ issue a stop command for stopping additional DC power from the quick charger 3 ′ to the quick charger 3. (Step ST20), and the rapid charging device 3 continues charging only with the DC power from the DC power supply unit 17 (step ST21).

In the present embodiment, the connection switch 5 is turned on and off by the command generation unit 21. However, the connection switch 5 is normally turned off, and a switch that is manually turned on when necessary is used. Of course it is good. The rated output of the quick charging devices 3 and 3 'is not limited to 30 kW, and may be a high output of less than 30 kW or 50 kW or more. For example, in the case of an output of 50 kW, an output capacity of a maximum of 100 kW can be secured in the “cooperative operation mode”. Furthermore, in this embodiment, one power plug (13, 13 ') extends from each of the quick charging devices, but a plurality (two or more) of power plugs may be provided for each.
<Second embodiment>
FIG. 6 is a conceptual diagram illustrating a rapid charging system in which the rapid charging device according to the second embodiment is combined. In FIG. 6, the same members as those in the embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2 plus 100. Is omitted. In addition, to the third quick-charging device and the like, the reference numeral “″” is added to the reference numeral, and the description of the configuration is omitted.

  In the second embodiment, three quick charging devices constituting the quick charging system 101 are the quick charging devices 103, 103 ', and 103 ", and are connected via the connection switches 105, 105', and 105". They are connected to each other by the cooperative cables 107, 107 ', and 107 ". With this configuration, the maximum output capacity that can be received by the power plug 113 of the quick charging device 103 is increased by the rating of the quick charging device 103. When the plug-in type vehicle 109 exceeding the output is connected, additional DC power can be received from one of the quick charging devices 103 ′ and 103 ″. Further, if DC power can be received from both of the quick charging devices 103 ′ and 103 ″, it becomes possible to output a larger DC power. It is possible to increase the redundancy of the “redundant operation mode” when an abnormality occurs.

<Third embodiment>
FIG. 7 is a conceptual diagram showing a quick charging system in which the quick charging device according to the third embodiment is combined, and FIG. 8 is a block diagram of the quick charging device according to the third embodiment (plug-in type). The illustration of the vehicle is omitted). 7 and 8, the same members as those of the embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2 plus 200. And the description is omitted. Since the quick charging device 203 and the quick charging device 203 'have the same configuration except for the power plug, the configuration of one quick charging device 203 will be described, and the description of the other quick charging device 203' will be omitted. I do. When referring to the components of the quick charging device 203 ′, the symbol “′” is added to the reference numerals assigned to the components of the quick charging device 203.

  In the third embodiment, each of the quick charging devices 203 and 203 ′ included in the quick charging system 201 includes a plurality of power plugs (specifically, in this embodiment, for example, two power plugs). ing. The two power plugs 213A and 213B are connected by two types of connection lines, that is, an A connection line and a B connection line. Specifically, it is connected to the power supply switching circuit 27 by an A connection line, and is also connected to the communication unit 223 by a B connection line.

  Further, the quick charging device 203 includes a connector 235 to which a power plug of another quick charging device (quick charging device 203 ′) can be connected. The connector 235 is connected to the external power receiving unit 231 and the communication unit 223 via a C connection line. When a power plug of another quick charging device (rapid charging device 203 ′) is connected, the power plug is connected to the connection cable. It is configured to serve as a replacement for 207. That is, in the case of the “normal operation mode”, the rapid charging device 203 and the rapid charging device 203 ′ operate as independent rapid charging devices. However, when the “cooperative operation mode” and the “redundant operation mode” are performed, By connecting the power plug 213'B of the quick charging device 203 'to the connector 235, the quick charging device 203 and the quick charging device 203' are connected to each other, and the quick charging system 201 is constructed. Since the quick charging devices 203 and 203 'do not necessarily have to have a plurality of power plugs, the quick charging system 201 may be constructed using a quick charging device having one power plug each. .

  In the third embodiment, in step ST4, when the supply output capacity determination unit 225 determines that the DC power is the same as the maximum output capacity or that the DC power is larger than the maximum output capacity, the quick charging is performed. The system 201 enters the “normal operation mode”, and the power supply switching circuit 227 supplies DC power to one of the two power plugs 213A and 213B according to the selection command of the command generation unit 221 (step ST5).

  If it is determined that the DC power is smaller than the maximum output capacity, in the third embodiment, first, in step ST6, it is determined whether the power plug of the quick charging device 203 'is connected to the connector 235. Confirm. When the power plug (power plug 213′B in FIG. 5) is connected, the command generation unit 221 sends the command generation unit 221 from the communication unit 223 to the command generation unit 221 ′ of the quick charging device 203 ′, as in the first embodiment. When the quick charging system 203 'is inquired and it is confirmed that the charging is not performed by the quick charging device 203' and that no abnormality occurs in the DC power supply unit 217 ', the quick charging system 201 enters the "cooperative operation mode". Transition. In the “cooperative operation mode”, the command generation unit 221 ′ of the quick charging device 203 ′ outputs a command to the power supply control unit 219 ′ and the power supply switching circuit 227 ′ and is connected to the connector 235 of the quick charging device 203. DC power is output to the power plug 213'B.

  In step ST2, when the power supply abnormality determination unit 220 determines that an abnormality has occurred in the DC power supply unit 217, in the third embodiment, first, in step ST9, another connector 235 is connected. Confirm that the power plug of the quick charging device (quick charging device 203 ') is connected. When the power plug (power plug 213′B in FIG. 7) is connected, the command generation unit 221 sends the command generation unit 221 from the communication unit 223 to the command generation unit 221 ′ of the quick charging device 203 ′ as in the first embodiment. When the quick charging system 203 'is inquired and it is confirmed that the charging is not performed by the quick charging device 203' or the DC power supply unit 217 'has no abnormality, the quick charging system 201 enters the "redundant operation mode". Transition. In the “redundant operation mode”, the command generation unit 221 ′ of the quick charging device 203 ′ outputs a command to the power control unit 219 ′ and the power supply switching circuit 227 ′ and is connected to the connector 235 of the quick charging device 203. DC power is output to the power plug 213'B.

  In the example of FIG. 7, the quick charging system 201 is configured by two quick charging devices 203 and 203 ′. However, as shown in FIG. 9, three or more Needless to say, the quick charging system 201 may be configured by arranging a plurality of quick charging devices. In FIG. 9, the symbols of the third quick charging device and the like are denoted by “″”, and the description of the configuration is omitted. As shown in FIG. 9, the power plug 213B of the quick charging device 203 is connected to the connector 235 "of the quick charging device 203", and the power plug 213B "of the quick charging device 203" is connected to the connector 235 'of the quick charging device 203'. By connecting the power plug 213'B of the quick charging device 203 'to the connector 235 of the quick charging device 203, for example, the quick charging device 203 converts the DC power of the quick charging device 203 "into the quick charging device 203'. , Each of the quick charging devices can output a larger DC power, and the number of the quick charging devices increases, as in the second embodiment. In addition, it is possible to increase the redundancy of the “redundant operation mode” when an abnormality occurs in any one of the DC power supply units.

<Fourth embodiment>
FIG. 10 is a conceptual diagram showing a rapid charging system in which the rapid charging device of the fourth embodiment is combined, and FIG. 11 is a block diagram of the rapid charging device of the fourth embodiment (plug-in type). The illustration of the vehicle is omitted). In FIGS. 10 and 11, the same members as those of the embodiment shown in FIGS. 7 and 8 are denoted by the same reference numerals as those in FIGS. And the description is omitted. Since the quick charging device 303 and the quick charging device 303 'have the same configuration except for the power plug, the configuration of one quick charging device 303 will be described, and the description of the other quick charging device 303' will be omitted. I do. When referring to the components of the quick charging device 303 ′, a symbol “′” is added to the component of the quick charging device 303.

  In the fourth embodiment, the power plug 313B of the quick charging device 303 is connected to the communication unit 323 via a C connection line and to the additional power addition circuit 333 via a D connection line. Further, the quick charging system 301 includes a connection connector 337 for configuring the quick charging system 301 by connecting one power plug of each of the two quick charging devices. With this configuration, in the case of the “normal operation mode”, the quick charging device 303 and the quick charging device 303 ′ operate as independent quick charging devices, but when the “cooperative operation mode” and the “redundant operation mode” are performed. By connecting the power plug 313B of the quick charging device 303 and the power plug 313'B of the quick charging device 303 'to the connector 337, the quick charging device 303 and the quick charging device 303' are connected to each other. The command generation unit 321 makes an inquiry from the communication unit 323 to the command generation unit 321 ′ of the quick charging device 303 ′ through the power plug 313 B, and supplies additional DC power from the quick charging device 303 ′ through the power plug 313 B. Power can be received, and the rapid charging system 301 is constructed.

  Although the embodiments of the present invention have been specifically described above, the present invention is not limited to these embodiments, and it is needless to say that modifications can be made within the technical idea of the present invention. It is.

  According to the present invention, even when the rated output capacity of the single quick-charging device is less than the maximum output capacity that the battery of the plug-in type vehicle can accept, the quick charging is performed with the maximum output capacity that the plug-in type vehicle can accept. A quick charging device and a quick charging system that can be provided can be provided. Further, it is possible to provide a quick charging device and a quick charging system having redundancy capable of performing charging even when a DC power supply unit included in the quick charging device does not operate due to a failure or the like.

DESCRIPTION OF SYMBOLS 1 Quick charging system 3 Quick charging device 5 Connection switch 7 Cooperation cable 9 Plug-in type vehicle 11 Plug-in connector 13 Power plug 15 Battery 17 DC power supply 19 Power supply control unit 20 Power supply abnormality determination unit 21 Command generation unit 23 Communication unit 25 Supply Output capacity determination unit 27 Power supply switching circuit 29 External power supply unit 31 External power reception unit 33 Additional power addition circuit

Claims (7)

A quick charging device for rapidly charging a battery mounted on a plug-in type vehicle,
DC power supply,
A power supply control unit that controls DC power output from the DC power supply unit according to a control command,
One or more power plugs that are connected to a plug-in connector of the plug-in vehicle and supply the DC power controlled by the power control unit to the battery of the plug-in vehicle;
A communication unit that performs communication between at least the plug-in type vehicle and obtains power storage information of the power storage device,
A supply output capacity determination unit that determines a maximum output capacity that can be accepted by the battery based on the power storage information obtained from the communication unit;
A power supply switching circuit that supplies the DC power controlled by the power control unit to the power plug according to the maximum output capacity determined by the supply output capacity determination unit;
An external power receiving unit that receives DC power from another quick charging device,
When the supply output capacity determination unit determines that the DC power alone does not satisfy the maximum output capacity, the supply output capacity determination unit receives additional DC power from the another quick charging device and outputs the DC power from the power supply switching circuit. An additional power addition circuit that secures an output capacity to be supplied by adding the additional DC power to the DC power,
The power supply control unit includes a power supply abnormality determination unit that determines whether the DC power supply unit can normally output the DC power,
The additional power addition circuit, when the power supply abnormality determination unit determines abnormality of the DC power supply unit, when the supply output capacity determination unit determines that the required output capacity can be secured by the additional DC power, A rapid charging device having a function of supplying additional DC power to the battery.   The quick charging device according to claim 1, further comprising an external power supply unit that outputs DC power to another quick charging device.   The quick charging device according to claim 2, wherein the external power supply unit is the power plug. A plurality of the power plugs,
4. The rapid charging according to claim 1, wherein at least one of the plurality of power plugs has a capacity capable of supplying power obtained by adding the DC power and the additional DC power. 5. apparatus.   A quick charging system comprising a plurality of quick charging devices according to claim 2, wherein the external power receiving unit of one quick charging device and the external power feeding unit of another quick charging device are electrically connected. .   The additional power addition circuit, while the another quick charging device is charging the plug-in type vehicle, while receiving only the DC power without receiving the additional DC power, When detecting that the charging of the another quick charging device is completed, the additional DC power is received from the another quick charging device, and the additional DC power is added to the DC power to increase the output capacity. 2. The quick charging device according to claim 1, wherein the quick charging device is configured to secure.   The additional power addition circuit may be configured to add the additional DC power and perform charging while adding the additional DC power to another power plug or one or more power plugs of the another quick charging device. The quick charging device according to claim 1, wherein when the connection is detected, the addition of the additional DC power is stopped and charging is continued with only the DC power.

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