JP7087536B2 - Charging device - Google Patents

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JP7087536B2
JP7087536B2 JP2018058177A JP2018058177A JP7087536B2 JP 7087536 B2 JP7087536 B2 JP 7087536B2 JP 2018058177 A JP2018058177 A JP 2018058177A JP 2018058177 A JP2018058177 A JP 2018058177A JP 7087536 B2 JP7087536 B2 JP 7087536B2
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converter
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賢二 岡▲崎▼
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GS Yuasa International Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02T90/14—Plug-in electric vehicles

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本明細書で開示する技術は、車両に搭載されている車両駆動用の蓄電装置を充電する充電装置に関する。 The technique disclosed herein relates to a charging device for charging a vehicle-driving power storage device mounted on a vehicle.

電気自動車やプラグインハイブリッド自動車などの車両に搭載されている車両駆動用の電気モータに電力を供給する蓄電装置（以下、車両駆動用の蓄電装置という）は長距離走行を可能にするために大容量化が求められている。このため、車両駆動用の蓄電装置を充電する充電装置も大容量化した蓄電装置を急速充電するために高い出力電力が求められている。 A power storage device that supplies power to a vehicle-driving electric motor mounted on a vehicle such as an electric vehicle or a plug-in hybrid vehicle (hereinafter referred to as a vehicle-driving power storage device) is large in order to enable long-distance driving. Capacity increase is required. Therefore, the charging device for charging the power storage device for driving the vehicle is also required to have high output power in order to quickly charge the power storage device having a large capacity.

充電装置の出力電力を高くする方法としては、充電装置に電力を供給する商用電源（外部電源）の契約形態を変更してより大きな電力を受電（高圧受電）する方法が考えられる。しかしながら、そのようにすると契約料金が上昇する上、大きな電力を受電するための設備（インフラ）が必要であり、コストの面で難しい。 As a method of increasing the output power of the charging device, it is conceivable to change the contract form of the commercial power supply (external power supply) that supplies power to the charging device to receive a larger amount of power (high voltage power reception). However, doing so raises the contract fee and requires equipment (infrastructure) to receive a large amount of electric power, which is difficult in terms of cost.

このため、従来、内部に蓄電装置（以下、内部電源という）を備え、充電器と内部電源とを直列に接続することによってコストの上昇を抑制しつつ急速充電する充電装置が知られている（例えば、特許文献１参照）。
具体的には、特許文献１に記載の急速充電装置は、第１直流電源器、第２直流電源器、及び、設備用蓄電装置を備えている（同文献の実施の形態３）。当該急速充電装置は電気自動車に搭載されている動力用蓄電装置を充電しないときに第１直流電源器によって設備用蓄電装置を充電し、動力用蓄電装置を充電するときは第２直流電源器と設備用蓄電池とを直列に接続することによって急速充電する。 For this reason, conventionally, a charging device having an internal power storage device (hereinafter referred to as an internal power source) and connecting a charger and an internal power source in series to quickly charge the battery while suppressing an increase in cost is known (hereinafter referred to as an internal power source). For example, see Patent Document 1).
Specifically, the quick charging device described in Patent Document 1 includes a first DC power supply device, a second DC power supply device, and a power storage device for equipment (Embodiment 3 of the same document). The quick charging device charges the equipment storage device by the first DC power supply when the power storage device mounted on the electric vehicle is not charged, and the second DC power supply when charging the power storage device. Quick charging is performed by connecting a storage battery for equipment in series.

特開２０１２－３９８６４号公報Japanese Unexamined Patent Publication No. 2012-39864

将来的には多くの車両が高い充電電力（商用電源から供給される電力より高い充電電力）を要求すると予想されるが、今後しばらくの間は高い充電電力を要求する車両と高い充電電力を要求しない車両とが混在することが考えられる。しかしながら、従来はこれらの車両が混在することについて十分に検討されていなかった。 In the future, many vehicles are expected to require high charge power (charge power higher than the power supplied from commercial power sources), but for the time being, vehicles that require high charge power and high charge power will be required. It is conceivable that there will be a mixture of vehicles that do not. However, in the past, the mixture of these vehicles has not been sufficiently studied.

本明細書では、外部電源から供給される電力より高い充電電力を要求する車両と外部電源から供給される電力以下の充電電力を要求する車両とが混在しても一の充電装置によってそれらの車両の蓄電装置を急速充電できる技術を開示する。 In the present specification, even if a vehicle that requires a charge power higher than the power supplied from an external power source and a vehicle that requires a charge power equal to or less than the power supplied from the external power source are mixed, those vehicles are used by one charging device. Discloses a technology that can quickly charge a power storage device.

車両に搭載されている車両駆動用の蓄電装置を充電する充電装置は、外部電源から供給される交流電力を直流電力に変換する変換器と、直流電力を供給する内部電源と、前記蓄電装置の充電電力に関する情報を取得する取得部と、制御部と、を備え、前記変換器と前記内部電源とが接続形態を切り替え可能に接続されており、前記制御部は、前記取得部によって取得された前記情報に応じて前記変換器と前記内部電源との接続形態を切り替えることにより、当該充電装置の出力電力を前記外部電源から供給される電力以下の出力電力又は前記外部電源から供給される電力より高い出力電力に切り替える。 The charging device for charging the power storage device for driving the vehicle mounted on the vehicle includes a converter that converts AC power supplied from an external power source into DC power, an internal power source that supplies DC power, and the power storage device. An acquisition unit for acquiring information on charging power and a control unit are provided, and the converter and the internal power supply are connected so as to be able to switch the connection form, and the control unit is acquired by the acquisition unit. By switching the connection form between the converter and the internal power supply according to the information, the output power of the charging device is equal to or less than the power supplied from the external power supply or the power supplied from the external power supply. Switch to higher output power.

外部電源から供給される電力より高い充電電力を要求する車両と外部電源から供給される電力以下の充電電力を要求する車両とが混在しても、一つの充電装置によってそれらの車両の蓄電装置を急速充電できる。 Even if a vehicle that requires a higher charging power than the power supplied from an external power source and a vehicle that requires a charging power that is less than or equal to the power supplied from an external power source are mixed, one charging device can be used to store the power storage device of those vehicles. Can be charged quickly.

実施形態に係る充電装置の電気的構成を示すブロック図（第１の接続形態）Block diagram showing the electrical configuration of the charging device according to the embodiment (first connection mode) 第１の充電器の電気的構成を示すブロック図Block diagram showing the electrical configuration of the first charger 蓄電装置の電気的構成を示すブロック図Block diagram showing the electrical configuration of the power storage device （Ａ）は第１の変換器及び第２の変換器の電流と電圧との関係を示すグラフ、（Ｂ）は蓄電装置の容量と電圧との関係を示すグラフ(A) is a graph showing the relationship between the current and voltage of the first converter and the second converter, and (B) is a graph showing the relationship between the capacity and voltage of the power storage device. 第１の接続形態の模式図Schematic diagram of the first connection form 充電装置の電気的構成を示すブロック図（第２の接続形態）Block diagram showing the electrical configuration of the charging device (second connection mode) 第２の接続形態の模式図Schematic diagram of the second connection form 充電装置の電気的構成を示すブロック図（第３の接続形態）Block diagram showing the electrical configuration of the charging device (third connection mode) 第３の接続形態の模式図Schematic diagram of the third connection form

（本実施形態の概要）
車両に搭載されている車両駆動用の蓄電装置を充電する充電装置は、外部電源から供給される交流電力を直流電力に変換する変換器と、直流電力を供給する内部電源と、前記蓄電装置の充電電力に関する情報を取得する取得部と、制御部と、を備え、前記変換器と前記内部電源とが接続形態を切り替え可能に接続されており、前記制御部は、前記取得部によって取得された前記情報に応じて前記変換器と前記内部電源との接続形態を切り替えることにより、当該充電装置の出力電力を前記外部電源から供給される電力以下の出力電力又は前記外部電源から供給される電力より高い出力電力に切り替える。 (Outline of this embodiment)
The charging device for charging the vehicle-driving power storage device mounted on the vehicle includes a converter that converts AC power supplied from an external power source into DC power, an internal power source that supplies DC power, and the power storage device. An acquisition unit for acquiring information on charging power and a control unit are provided, and the converter and the internal power supply are connected so as to be able to switch the connection form, and the control unit is acquired by the acquisition unit. By switching the connection form between the converter and the internal power supply according to the information, the output power of the charging device is equal to or less than the power supplied from the external power supply or the power supplied from the external power supply. Switch to higher output power.

上記の充電装置によると、外部電源から供給される電力より高い充電電力を要求する車両と外部電源から供給される電力以下の充電電力を要求する車両とが混在しても一の充電装置によってそれらの車両の蓄電装置を急速充電できる。このため、車両が要求する充電電力毎に充電装置を用意する場合に比べて充電装置のコストや設置スペースを低減できる。
商用電源などの外部電源から大きな電力を受電することはコストの面で将来的にも難しいと考えられるが、車両が要求する充電電力は車種、時代、あるいは世の中の流れの変化によって高くなっていくことが予想される。すなわち、充電装置への入力電力は変化せず、充電装置の出力電力だけが変化していくことが考えられる。上記の充電装置によると、蓄電装置の数を変更することによって出力電力を変更することが可能であるので、充電装置への入力電力はそのままで出力電力の変化に対応できる。
家庭では事業所などに比べて受電電力が小さい契約形態が一般である。上記の充電装置によると、入力された電力以上の電力を出力できるので、家庭においても従来に比べて容量の大きい蓄電装置を急速充電できる。このため家庭で車両を充電する場合の利便性が向上する。 According to the above charging device, even if a vehicle that requires a charging power higher than the power supplied from an external power source and a vehicle that requires a charging power lower than the power supplied from the external power source are mixed, they are used by one charging device. The power storage device of the vehicle can be charged quickly. Therefore, the cost and installation space of the charging device can be reduced as compared with the case where the charging device is prepared for each charging power required by the vehicle.
It is considered difficult in the future to receive a large amount of power from an external power source such as a commercial power source in terms of cost, but the charging power required by the vehicle will increase depending on the vehicle type, age, or changes in the world. It is expected that. That is, it is conceivable that the input power to the charging device does not change, but only the output power of the charging device changes. According to the above charging device, the output power can be changed by changing the number of power storage devices, so that the input power to the charging device can be changed as it is.
At home, it is common to have a contract with a smaller amount of power received than at a business establishment. According to the above-mentioned charging device, since it is possible to output more power than the input power, it is possible to quickly charge a power storage device having a larger capacity than before even at home. Therefore, the convenience when charging the vehicle at home is improved.

前記変換器は出力電圧及び出力電流が可変であり、前記制御部は前記情報に応じて前記変換器の出力電圧及び出力電流を制御してもよい。 The output voltage and output current of the converter are variable, and the control unit may control the output voltage and output current of the converter according to the information.

充電電力が同じであっても車両によって充電電圧や充電電流が異なることがある。上記の充電装置によると、蓄電装置の充電電力に関する情報に応じて変換器の出力電圧及び出力電流を制御するので、車両ごとに適切な電圧値及び電流値の充電電力を供給できる。 Even if the charging power is the same, the charging voltage and charging current may differ depending on the vehicle. According to the above charging device, since the output voltage and the output current of the converter are controlled according to the information regarding the charging power of the power storage device, it is possible to supply the charging power of an appropriate voltage value and current value for each vehicle.

当該充電装置は前記変換器として第１の変換器と第２の変換器とを備えており、前記変換器と前記内部電源との接続形態には、前記第２の変換器と前記内部電源とが並列に接続され、それらに対して前記第１の変換器が充電電流の流れ方向の上流側に直列に接続される第１の接続形態と、前記第１の変換器と前記第２の変換器とが並列に接続され、それらに対して前記内部電源が充電電流の流れ方向の下流側に直列に接続される第２の接続形態とがあり、前記制御部は、前記車両が要求する充電電力が前記外部電源から供給される電力以下の場合は前記第１の接続形態に切り替え、前記外部電源から供給される電力より高い場合は前記第２の接続形態に切り替えてもよい。 The charging device includes a first converter and a second converter as the converter, and the connection form between the converter and the internal power supply includes the second converter and the internal power supply. First connection form in which the first converters are connected in parallel to them in series on the upstream side in the flow direction of the charging current, and the first converter and the second conversion. There is a second connection mode in which the devices are connected in parallel and the internal power supply is connected in series to the downstream side in the flow direction of the charging current, and the control unit is charged as required by the vehicle. If the power is equal to or less than the power supplied from the external power source, the connection may be switched to the first connection form, and if the power is higher than the power supplied from the external power source, the connection mode may be switched to the second connection form.

上記の充電装置によると、車両が要求する充電電力が外部電源から供給される電力以下の場合は第１の接続形態に切り替えることによって車両が要求する充電電力を供給できる。一方、車両が要求する充電電力が外部電源から供給される電力より高い場合は第２の接続形態に切り替えることによって車両が要求する充電電力を供給できる。 According to the above charging device, when the charging power required by the vehicle is equal to or less than the power supplied from the external power source, the charging power required by the vehicle can be supplied by switching to the first connection mode. On the other hand, when the charging power required by the vehicle is higher than the power supplied from the external power source, the charging power required by the vehicle can be supplied by switching to the second connection mode.

前記内部電源は蓄電装置であってもよい。 The internal power source may be a power storage device.

上記の充電装置によると、内部電源が蓄電装置であるので、第１の接続形態に切り替えられているときに第２の変換器によって内部電源が充電される。このため、第２の接続形態に切り替えたときに内部電源の電圧が低いことによって車両の蓄電装置を急速充電できない可能性を低減できる。 According to the above charging device, since the internal power supply is a power storage device, the internal power supply is charged by the second converter when the connection mode is switched to the first connection mode. Therefore, it is possible to reduce the possibility that the power storage device of the vehicle cannot be quickly charged due to the low voltage of the internal power source when switching to the second connection mode.

前記制御部は、前記第１の接続形態では、前記第２の変換器の出力電圧及び出力電流を一定に制御し、当該充電装置の出力電圧及び出力電流が前記情報に応じた出力電圧及び出力電流となるよう、前記第２の変換器から前記内部電源に流れる電流の変化に応じて前記第１の変換器を制御してもよい。 In the first connection mode, the control unit constantly controls the output voltage and output current of the second converter, and the output voltage and output current of the charging device correspond to the information. The first converter may be controlled according to a change in the current flowing from the second converter to the internal power source so as to be a current.

内部電源の充電が進行すると第２の変換器から内部電源に流れる電流が徐々に減少する。すなわち、第２の変換器の出力電圧及び出力電流を一定にしても、第２の変換器から内部電源に流れる電流は充電の進行に伴って変化する。上記の充電装置によると、第２の変換器から内部電源に流れる電流が変化しても第１の変換器を制御することにより車両に一定の出力電圧及び出力電流を供給できる。 As the charging of the internal power supply progresses, the current flowing from the second converter to the internal power supply gradually decreases. That is, even if the output voltage and output current of the second converter are kept constant, the current flowing from the second converter to the internal power supply changes with the progress of charging. According to the above charging device, even if the current flowing from the second converter to the internal power supply changes, a constant output voltage and output current can be supplied to the vehicle by controlling the first converter.

前記制御部は、前記第２の接続形態では、当該充電装置の出力電圧及び出力電流が前記情報に応じた出力電圧及び出力電流となるよう、前記内部電源の電圧の変化に応じて前記第１の変換器及び前記第２の変換器を制御してもよい。 In the second connection mode, the control unit responds to a change in the voltage of the internal power supply so that the output voltage and the output current of the charging device become the output voltage and the output current according to the information. The converter and the second converter may be controlled.

第２の接続形態では内部電源が車両の蓄電装置の充電に用いられるので、内部電源の電圧が放電に伴って徐々に降下する。上記の充電装置によると、内部電源の電圧が変化しても車両に一定の出力電圧及び出力電流を供給できる。 In the second connection mode, since the internal power supply is used for charging the power storage device of the vehicle, the voltage of the internal power supply gradually drops with the discharge. According to the above charging device, a constant output voltage and output current can be supplied to the vehicle even if the voltage of the internal power supply changes.

前記変換器と前記内部電源との接続形態には、更に、前記第１の変換器と前記第２の変換器とが並列に接続され、前記内部電源が切り離される第３の接続形態があり、前記制御部は、前記車両が要求する充電電力が前記外部電源から供給される電力以下である場合に、前記車両が要求する充電電圧が前記内部電源の電圧より高い場合は前記第１の接続形態に切り替え、前記内部電源の電圧より低い場合は前記第３の接続形態に切り替えてもよい。 The connection form between the converter and the internal power supply further includes a third connection form in which the first converter and the second converter are connected in parallel and the internal power supply is disconnected. The control unit has the first connection mode when the charging power required by the vehicle is equal to or less than the power supplied from the external power source and the charging voltage required by the vehicle is higher than the voltage of the internal power source. If the voltage is lower than the voltage of the internal power supply, the voltage may be switched to the third connection mode.

上記の充電装置によると、車両が要求する充電電力が外部電源から供給される電力以下であり、且つ、車両が要求する充電電圧が内部電源の電圧より低い場合は第３の接続形態に切り替えることによって内部電源を切り離すので、内部電源から車両の蓄電装置に放電されることを防止できる。このため、その後に第２の接続形態に切り替えたときに内部電源の電圧が低いことによって車両の蓄電装置を急速充電できない可能性を低減できる。 According to the above charging device, if the charging power required by the vehicle is less than or equal to the power supplied from the external power source and the charging voltage required by the vehicle is lower than the voltage of the internal power source, the connection mode is switched to the third connection mode. Since the internal power supply is disconnected, it is possible to prevent the internal power supply from being discharged to the power storage device of the vehicle. Therefore, it is possible to reduce the possibility that the power storage device of the vehicle cannot be quickly charged due to the low voltage of the internal power supply when the connection mode is subsequently switched to the second connection mode.

本明細書によって開示される技術は、装置、方法、これらの装置または方法の機能を実現するためのコンピュータプログラム、そのコンピュータプログラムを記録した記録媒体等の種々の態様で実現できる。 The techniques disclosed herein can be realized in various aspects such as devices, methods, computer programs for realizing the functions of these devices or methods, recording media on which the computer programs are recorded, and the like.

＜実施形態１＞
実施形態１を図１ないし図９によって説明する。 <Embodiment 1>
The first embodiment will be described with reference to FIGS. 1 to 9.

（１）充電装置の構成
図１を参照して、実施形態に係る充電装置１の構成について説明する。充電装置１は例えば充電スタンドや事業所などに備えられ、電気自動車やプラグインハイブリッド自動車などの車両３に搭載されている図示しない車両駆動用の蓄電装置（以下、車両側バッテリという）を急速充電する。 (1) Configuration of Charging Device The configuration of the charging device 1 according to the embodiment will be described with reference to FIG. The charging device 1 is provided in, for example, a charging stand or a business establishment, and rapidly charges a storage device for driving a vehicle (hereinafter referred to as a vehicle-side battery) mounted on a vehicle 3 such as an electric vehicle or a plug-in hybrid vehicle (hereinafter referred to as a vehicle-side battery). do.

充電装置１は車両３のＥＣＵから車両側バッテリの充電電力に関する情報（以下、充電情報という）を受信（取得の一例）し、商用電源２（外部電源の一例）から供給される交流電力を充電情報に応じた直流の出力電圧及び出力電流に変換して車両３に出力する。充電情報は、具体的には例えば車両３が要求する充電電圧値及び充電電流値である。充電情報には車両３が要求する充電電力を表す情報が含まれてもよい。 The charging device 1 receives information (hereinafter referred to as charging information) regarding the charging power of the vehicle-side battery from the ECU of the vehicle 3 (an example of acquisition), and charges the AC power supplied from the commercial power source 2 (an example of an external power source). It is converted into DC output voltage and output current according to the information and output to the vehicle 3. Specifically, the charging information is, for example, a charging voltage value and a charging current value required by the vehicle 3. The charging information may include information representing the charging power required by the vehicle 3.

本実施形態では商用電源２の契約形態は３相、２００Ｖ、５０Ｈｚ、５０ｋＷ未満であるとする。車両側バッテリを充電する規格として現在広く普及している規格は充電電力が５０ｋＷ未満であるが、将来的には車両３が５０ｋＷ以上の充電電力を要求することが予想される。このため充電装置１は蓄電装置１２（内部電源の一例）を備えており、商用電源２の契約形態が５０ｋＷ未満であっても蓄電装置１２を用いることによって５０ｋＷ以上の電力を出力できる。上述した契約形態は一例である。契約形態は上述した形態に限定されるものではない。 In the present embodiment, it is assumed that the contract form of the commercial power supply 2 is three-phase, 200V, 50Hz, and less than 50kW. The standard currently widely used for charging the vehicle-side battery has a charging power of less than 50 kW, but it is expected that the vehicle 3 will require a charging power of 50 kW or more in the future. Therefore, the charging device 1 is provided with a power storage device 12 (an example of an internal power source), and even if the contract form of the commercial power source 2 is less than 50 kW, the power storage device 12 can output electric power of 50 kW or more. The above-mentioned contract form is an example. The contract form is not limited to the above-mentioned form.

ただし、今後しばらくの間は５０ｋＷ未満の充電電力を要求する車両３と５０ｋＷ以上の充電電力を要求する車両３とが混在することが考えられる。このため、充電装置１は充電電力が５０ｋＷ未満の車両３と５０ｋＷ以上の車両３との両方を充電可能に構成されている。 However, for the time being, it is conceivable that a vehicle 3 that requires a charging power of less than 50 kW and a vehicle 3 that requires a charging power of 50 kW or more will coexist. Therefore, the charging device 1 is configured to be able to charge both the vehicle 3 having a charging power of less than 50 kW and the vehicle 3 having a charging power of 50 kW or more.

図１に示すように、充電装置１は第１の充電器１０、第２の充電器１１、蓄電装置１２、充電コネクタ１３、第１の切替スイッチ１４、第２の切替スイッチ１５、スイッチ１６、及び、ダイオード１７を備えており、これらが電力線２０ａ～２０ｆによって接続されている。 As shown in FIG. 1, the charging device 1 includes a first charger 10, a second charger 11, a power storage device 12, a charging connector 13, a first changeover switch 14, a second changeover switch 15, and a switch 16. A diode 17 is provided, and these are connected by power lines 20a to 20f.

第１の充電器１０の正極は電力線２０ａを介して蓄電装置１２の負極に接続されており、負極は電力線２０ｂを介して充電コネクタ１３に接続されている。詳しくは後述するが、第１の充電器１０は制御部２３（図２参照）を備えている。第１の充電器１０の制御部２３は通信線２１ａ～２１ｃを介して充電コネクタ１３、蓄電装置１２及び第２の充電器１１の制御部２３と通信可能に接続されている。 The positive electrode of the first charger 10 is connected to the negative electrode of the power storage device 12 via the power line 20a, and the negative electrode is connected to the charging connector 13 via the power line 20b. As will be described in detail later, the first charger 10 includes a control unit 23 (see FIG. 2). The control unit 23 of the first charger 10 is communicably connected to the charging connector 13, the power storage device 12, and the control unit 23 of the second charger 11 via communication lines 21a to 21c.

第１の充電器１０の出力電圧、出力電流及び最大出力は以下の通りである。
出力電圧（直流電圧）：４８～３００Ｖ
出力電流（直流電流）：０～１２５Ａ
最大出力：２５ｋＷ
上述した出力電圧、出力電流及び最大出力は一例である。第１の充電器１０の出力電圧、出力電流及び最大出力は適宜に決定できる。 The output voltage, output current and maximum output of the first charger 10 are as follows.
Output voltage (DC voltage): 48-300V
Output current (direct current): 0 to 125A
Maximum output: 25kW
The output voltage, output current, and maximum output described above are examples. The output voltage, output current and maximum output of the first charger 10 can be appropriately determined.

第２の充電器１１は第１の充電器１０と同一構成である。第２の充電器１１の負極には第１の切替スイッチ１４が接続されており、正極には第２の切替スイッチ１５が接続されている。 The second charger 11 has the same configuration as the first charger 10. The first changeover switch 14 is connected to the negative electrode of the second charger 11, and the second changeover switch 15 is connected to the positive electrode.

第１の切替スイッチ１４の接点Ａは第１の充電器１０の負極と充電コネクタ１３とを接続している電力線２０ｂから分岐する電力線２０ｃに接続されている。第１の切替スイッチ１４の接点Ｂ及び第２の切替スイッチ１５の接点Ｃは電力線２０ｄと電力線２０ｅとを介して電力線２０ａに接続されている。第２の切替スイッチ１５の接点Ｄは電力線２０ｆを介して充電コネクタ１３に接続されている。 The contact A of the first changeover switch 14 is connected to the power line 20c branched from the power line 20b connecting the negative electrode of the first charger 10 and the charging connector 13. The contact B of the first changeover switch 14 and the contact C of the second changeover switch 15 are connected to the power line 20a via the power line 20d and the power line 20e. The contact D of the second changeover switch 15 is connected to the charging connector 13 via the power line 20f.

ダイオード１７は電力線２０ｄと電力線２０ｆとを接続している電力線２０ｇに設けられている。ダイオード１７は後述する第１の接続形態において電流が逆流することを防止するために設けられている。
蓄電装置１２は５０ｋＷ以上１００ｋＷ未満の充電電力を要求する車両３が接続された場合に不足する電圧を補うためのものである。蓄電装置１２の負極は電力線２０ａを介して第１の充電器１０の正極に接続されており、正極はスイッチ１６を介して電力線２０ｆに接続されている。 The diode 17 is provided in the power line 20g connecting the power line 20d and the power line 20f. The diode 17 is provided to prevent the current from flowing back in the first connection mode described later.
The power storage device 12 is for supplementing the voltage that is insufficient when the vehicle 3 that requires charging power of 50 kW or more and less than 100 kW is connected. The negative electrode of the power storage device 12 is connected to the positive electrode of the first charger 10 via the power line 20a, and the positive electrode is connected to the power line 20f via the switch 16.

蓄電装置１２の最大電圧、容量及び放電電力は以下の通りである。
最大電圧：２５０Ｖ
容量：２００Ａｈ
放電電力：５０ｋＷ
上述した最大電圧、容量及び放電電力は一例である。蓄電装置１２の最大電圧、容量及び放電電力は適宜に決定できる。 The maximum voltage, capacity, and discharge power of the power storage device 12 are as follows.
Maximum voltage: 250V
Capacity: 200Ah
Discharge power: 50kW
The maximum voltage, capacity and discharge power described above are examples. The maximum voltage, capacity, and discharge power of the power storage device 12 can be appropriately determined.

充電コネクタ１３は車両３に設けられている図示しない充電インレットに接続されるものである。充電コネクタ１３が充電インレットに接続されることによって充電装置１が車両側バッテリに電気的に接続されるとともに、第１の充電器１０の制御部２３が車両３のＥＣＵと通信可能に接続される。 The charging connector 13 is connected to a charging inlet (not shown) provided in the vehicle 3. By connecting the charging connector 13 to the charging inlet, the charging device 1 is electrically connected to the vehicle-side battery, and the control unit 23 of the first charger 10 is communicably connected to the ECU of the vehicle 3. ..

（１－１）第１の充電器及び第２の充電器の電気的構成
図２を参照して、第１の充電器１０及び第２の充電器１１の電気的構成について説明する。第１の充電器１０と第２の充電器１１とは同一構成であるのでここでは第１の充電器１０を例に説明する。第１の充電器１０は商用電源２から供給される交流電力を直流電力に変換する変換器２２、及び、変換器２２を制御する制御部２３を備えている。 (1-1) Electrical Configuration of First Charger and Second Charger With reference to FIG. 2, the electrical configuration of the first charger 10 and the second charger 11 will be described. Since the first charger 10 and the second charger 11 have the same configuration, the first charger 10 will be described here as an example. The first charger 10 includes a converter 22 that converts AC power supplied from the commercial power source 2 into DC power, and a control unit 23 that controls the converter 22.

変換器２２は出力電圧及び出力電流が可変であり、商用電源２から供給される交流電力を制御部２３から指示された電圧値及び電流値の直流電力に変換する。変換器２２は交流電力を指示された電圧値及び電流値の直流電力に変換可能な構成であれば任意の構成であってよい。第１の充電器１０の変換器２２は第１の変換器の一例であり、第２の充電器１１の変換器２２は第２の変換器の一例である。 The converter 22 has a variable output voltage and output current, and converts AC power supplied from the commercial power source 2 into DC power having a voltage value and a current value instructed by the control unit 23. The converter 22 may have any configuration as long as it can convert AC power into DC power having the indicated voltage value and current value. The converter 22 of the first charger 10 is an example of the first converter, and the converter 22 of the second charger 11 is an example of the second converter.

制御部２３はＣＰＵ、ＲＯＭ、ＲＡＭ、通信部などを備えている。前述した充電コネクタ１３と通信部とは充電情報を取得する取得部の一例である。制御部２３はＣＰＵに替えて、あるいはＣＰＵに加えてＡＳＩＣ（Ａｐｐｌｉｃａｔｉｏｎ Ｓｐｅｃｉｆｉｃ Ｉｎｔｅｇｒａｔｅｄ Ｃｉｒｃｕｉｔ）やＦＰＧＡ（Ｆｉｅｌｄ Ｐｒｏｇｒａｍｍａｂｌｅ Ｇａｔｅ Ａｒｒａｙ）などを備えていてもよい。 The control unit 23 includes a CPU, ROM, RAM, a communication unit, and the like. The charging connector 13 and the communication unit described above are examples of an acquisition unit that acquires charging information. The control unit 23 may include an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or the like in place of the CPU or in addition to the CPU.

本実施形態では第１の充電器１０の制御部２３が主、第２の充電器１１の制御部２３が従の関係にあり、第１の充電器１０の制御部２３が充電装置１全体を制御する。第２の充電器１１の制御部２３が主、第１の充電器１０の制御部２３が従であってもよい。 In the present embodiment, the control unit 23 of the first charger 10 is the main, the control unit 23 of the second charger 11 is the subordinate relationship, and the control unit 23 of the first charger 10 controls the entire charging device 1. Control. The control unit 23 of the second charger 11 may be the main, and the control unit 23 of the first charger 10 may be the subordinate.

（１－２）蓄電装置の電気的構成
図３に示すように、蓄電装置１２は組電池３０及び電池管理装置３１（ＢＭＳ：Ｂａｔｔｅｒｙ Ｍａｎａｇｅｍｅｎｔ Ｓｙｓｔｅｍ）を備えている。組電池３０は複数の電池セル３２が直列接続されたものである。各電池セル３２は繰り返し充電可能な二次電池であり、具体的には例えばリチウムイオン電池である。複数の電池セル３２は並列接続されてもよいし、直列と並列とを組み合わせて接続されてもよい。 (1-2) Electrical Configuration of Power Storage Device As shown in FIG. 3, the power storage device 12 includes an assembled battery 30 and a battery management device 31 (BMS: Battery Management System). The assembled battery 30 is a battery cell 32 connected in series. Each battery cell 32 is a rechargeable secondary battery, specifically, for example, a lithium ion battery. The plurality of battery cells 32 may be connected in parallel, or may be connected in series and in parallel.

ＢＭＳ３１は電流センサ３３、電圧センサ３４及び管理部３５を備えている。電流センサ３３は組電池３０と直列に接続されており、組電池３０に流れる電流の電流値Ｉ［Ａ］を計測して管理部３５に出力する。電圧センサ３４は各電池セル３２に並列に接続されており、各電池セル３２の端子電圧である電圧値Ｖ［Ｖ］を計測して管理部３５に出力する。 The BMS 31 includes a current sensor 33, a voltage sensor 34, and a management unit 35. The current sensor 33 is connected in series with the assembled battery 30, measures the current value I [A] of the current flowing through the assembled battery 30, and outputs the current value I [A] to the management unit 35. The voltage sensor 34 is connected in parallel to each battery cell 32, measures the voltage value V [V] which is the terminal voltage of each battery cell 32, and outputs the voltage value V [V] to the management unit 35.

管理部３５は組電池３０から供給される電力によって動作するものであり、ＣＰＵ、ＲＯＭ、ＲＡＭ、通信部などを備えている。ＣＰＵは通信部を介して第１の充電器１０の制御部２３に組電池３０の電流値Ｉや電圧値Ｖを出力する。管理部３５はＣＰＵに替えて、あるいはＣＰＵに加えてＡＳＩＣ（Ａｐｐｌｉｃａｔｉｏｎ Ｓｐｅｃｉｆｉｃ Ｉｎｔｅｇｒａｔｅｄ Ｃｉｒｃｕｉｔ）やＦＰＧＡ（Ｆｉｅｌｄ Ｐｒｏｇｒａｍｍａｂｌｅ Ｇａｔｅ Ａｒｒａｙ）などを備えていてもよい。 The management unit 35 operates by the electric power supplied from the assembled battery 30, and includes a CPU, a ROM, a RAM, a communication unit, and the like. The CPU outputs the current value I and the voltage value V of the assembled battery 30 to the control unit 23 of the first charger 10 via the communication unit. The management unit 35 may include an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or the like in place of the CPU or in addition to the CPU.

（２）充電器の電流と電圧との関係、及び、蓄電装置の容量と電圧との関係
図４（Ａ）を参照して、第１の充電器１０及び第２の充電器１１の電流と電圧との関係について説明する。ここでは第１の充電器１０を例に説明する。図４（Ａ）において実線４０は出力電圧が２５ｋＷとなる出力電圧及び出力電流を示している。第１の充電器１０の出力電圧及び出力電流の組み合わせが取り得る範囲は実線４０の内側となる。 (2) Relationship between current and voltage of the charger and relationship between capacity and voltage of the power storage device With reference to FIG. 4A, the current of the first charger 10 and the second charger 11 The relationship with voltage will be described. Here, the first charger 10 will be described as an example. In FIG. 4A, the solid line 40 shows the output voltage and the output current at which the output voltage is 25 kW. The range that the combination of the output voltage and the output current of the first charger 10 can take is inside the solid line 40.

図４（Ｂ）を参照して、蓄電装置１２の容量と電圧との関係について説明する。蓄電装置１２の電圧は充電に伴って上昇し、放電に伴って下降する。詳しくは後述するが、第１の充電器１０の制御部２３は、充電装置１の出力電力が、車両３が要求する充電電力となるように制御する。より具体的には、第１の充電器１０の制御部２３は、蓄電装置１２に流れる電流の変化や蓄電装置１２の電圧の変化に応じて図４（Ａ）の実線４０の内側となる範囲で第１の充電器１０及び第２の充電器１１の出力電圧及び出力電流を制御する。 The relationship between the capacity and the voltage of the power storage device 12 will be described with reference to FIG. 4 (B). The voltage of the power storage device 12 rises with charging and falls with discharging. As will be described in detail later, the control unit 23 of the first charger 10 controls so that the output power of the charging device 1 becomes the charging power required by the vehicle 3. More specifically, the control unit 23 of the first charger 10 has a range inside the solid line 40 of FIG. 4 (A) according to a change in the current flowing through the power storage device 12 and a change in the voltage of the power storage device 12. Controls the output voltage and output current of the first charger 10 and the second charger 11.

（３）複数の充電器と蓄電装置との接続形態
第１の充電器１０、第２の充電器１１及び蓄電装置１２の接続形態には、図１に示す第１の接続形態（高圧、小電流に対応する接続形態）、図６に示す第２の接続形態（高圧、大電流に対応する接続形態）、及び、図８に示す第３の接続形態（低圧、大電流に対応する接続形態）の３つがある。これらの接続形態の切り替えは第１の充電器１０の制御部２３が第１の切替スイッチ１４、第２の切替スイッチ１５及びスイッチ１６を切り替えることによって行われる。 (3) Connection form between a plurality of chargers and a power storage device The connection form of the first charger 10, the second charger 11 and the power storage device 12 includes the first connection form (high voltage, small) shown in FIG. Connection form corresponding to current), second connection form shown in FIG. 6 (connection form corresponding to high voltage and large current), and third connection form shown in FIG. 8 (connection form corresponding to low voltage and large current). ). The switching of these connection forms is performed by the control unit 23 of the first charger 10 switching the first changeover switch 14, the second changeover switch 15, and the switch 16.

（３－１）第１の接続形態
図１に示すように、第１の接続形態では第１の切替スイッチ１４が接点Ｂに接続され、第２の切替スイッチ１５が接点Ｄに接続され、スイッチ１６がオンにされる。すなわち、図５に模式的に示すように、第１の接続形態では第２の充電器１１と蓄電装置１２とが並列に接続され、それらに対して充電電流の流れ方向（図中において矢印４１で示す方向）の上流側に第１の充電器１０が直列に接続される。第１の充電器１０は第２の充電器１１と蓄電装置１２とに対して充電電流の流れ方向の下流側に直列に接続されてもよい。 (3-1) First Connection Form As shown in FIG. 1, in the first connection form, the first changeover switch 14 is connected to the contact B, the second changeover switch 15 is connected to the contact D, and the switch is switched. 16 is turned on. That is, as schematically shown in FIG. 5, in the first connection mode, the second charger 11 and the power storage device 12 are connected in parallel, and the flow direction of the charging current with respect to them (arrow 41 in the figure). The first charger 10 is connected in series on the upstream side in the direction indicated by. The first charger 10 may be connected in series to the second charger 11 and the power storage device 12 on the downstream side in the flow direction of the charging current.

図１に示すように、充電装置１は以下のような充電電圧、充電電流及び充電電力を要求する車両３が接続された場合に第１の接続形態に切り替えられる。
充電電圧：５００Ｖ未満
充電電流：１２５Ａ未満
充電電力：５０ｋＷ未満
５００Ｖ未満の具体的な充電電圧値や１２５Ａ未満の具体的な充電電流値は車種によって異なる。具体的な充電電圧値や充電電流値は前述した充電情報として車両３から充電装置１に送信される。車両が要求する具体的な充電電力は充電電圧値と充電電流値との積として特定できる。 As shown in FIG. 1, the charging device 1 is switched to the first connection form when a vehicle 3 that requires the following charging voltage, charging current, and charging power is connected.
Charging voltage: less than 500V Charging current: less than 125A Charging power: less than 50kW The specific charging voltage value less than 500V and the specific charging current value less than 125A differ depending on the vehicle model. The specific charging voltage value and charging current value are transmitted from the vehicle 3 to the charging device 1 as the charging information described above. The specific charging power required by the vehicle can be specified as the product of the charging voltage value and the charging current value.

この場合、充電装置１の最大出力電圧、最大出力電流及び最大出力電力は以下のように制御される。
最大出力電圧：５００Ｖ未満
最大出力電流：１２５Ａ未満
最大出力電力：５０ｋＷ未満 In this case, the maximum output voltage, maximum output current, and maximum output power of the charging device 1 are controlled as follows.
Maximum output voltage: less than 500V Maximum output current: less than 125A Maximum output power: less than 50kW

図１に示す例では車両３が要求する充電電圧が５００Ｖ未満である。第１の充電器１０及び第２の充電器１１の最大出力電圧は３００Ｖであるので、仮にこれらを並列に接続したとすると電圧が３００Ｖのままとなり、車両３が要求する充電電圧を供給できない。これに対し、これらを直列に接続すると最大出力電圧が６００Ｖになるので、車両３が要求する充電電圧を供給できる。 In the example shown in FIG. 1, the charging voltage required by the vehicle 3 is less than 500V. Since the maximum output voltage of the first charger 10 and the second charger 11 is 300V, if they are connected in parallel, the voltage remains at 300V, and the charging voltage required by the vehicle 3 cannot be supplied. On the other hand, when these are connected in series, the maximum output voltage becomes 600 V, so that the charging voltage required by the vehicle 3 can be supplied.

前述したように第１の充電器１０及び第２の充電器１１の最大出力電流は１２５Ａである。第１の充電器１０と第２の充電器１１とを直列に接続しても出力電流は１２５Ａのままであるが、車両３が要求する充電電流が１２５Ａ未満であるので、車両３が要求する充電電圧を供給するためにこれらを直列に接続しても車両３が要求する充電電流を供給できる。 As described above, the maximum output current of the first charger 10 and the second charger 11 is 125 A. Even if the first charger 10 and the second charger 11 are connected in series, the output current remains 125 A, but the charging current required by the vehicle 3 is less than 125 A, so the vehicle 3 requires it. Even if these are connected in series to supply a charging voltage, the charging current required by the vehicle 3 can be supplied.

図１に示す例では蓄電装置１２を用いなくても充電装置１の出力電圧が５００Ｖ以上になる。このため蓄電装置１２は車両側バッテリの充電には用いられず、車両側バッテリの充電中に第２の充電器１１によって充電される。
具体的には、第１の接続形態では第２の充電器１１の出力電圧及び出力電流が例えば２９５．２Ｖ、１２５Ａに固定される。蓄電装置１２の最大電圧は２５０Ｖであるので、第２の充電器１１の出力電圧を２９５．２Ｖに固定すると第２の充電器１１の電圧の方が蓄電装置１２の電圧より高くなる。このため第２の充電器１１によって蓄電装置１２が充電される。第２の充電器１１が蓄電装置１２を充電する充電電流は１２５Ａから車両３が要求する充電電流を減じた電流となる。例えば車両３が要求する充電電流が１００Ａであるとすると、蓄電装置１２には２５Ａ（＝１２５Ａ－１００Ａ）の電流が供給される。 In the example shown in FIG. 1, the output voltage of the charging device 1 becomes 500 V or more without using the power storage device 12. Therefore, the power storage device 12 is not used for charging the vehicle-side battery, but is charged by the second charger 11 while the vehicle-side battery is being charged.
Specifically, in the first connection mode, the output voltage and output current of the second charger 11 are fixed to, for example, 295.2V, 125A. Since the maximum voltage of the power storage device 12 is 250V, if the output voltage of the second charger 11 is fixed at 295.2V, the voltage of the second charger 11 becomes higher than the voltage of the power storage device 12. Therefore, the power storage device 12 is charged by the second charger 11. The charging current for charging the power storage device 12 by the second charger 11 is 125A minus the charging current required by the vehicle 3. For example, assuming that the charging current required by the vehicle 3 is 100 A, a current of 25 A (= 125 A-100 A) is supplied to the power storage device 12.

第２の充電器１１による蓄電装置１２の充電が進行すると、第２の充電器１１から蓄電装置１２に流れる電流が徐々に減少する。このため、第１の充電器１０の制御部２３は蓄電装置１２に流れる電流の減少を考慮して充電装置１の出力電圧及び出力電流を制御する。
具体的には、第１の充電器１０の制御部２３は蓄電装置１２に流れる電流の電流値を蓄電装置１２のＢＭＳ３１から所定の時間間隔で受信し、第１の充電器１０と第２の充電器１１とを合わせた出力電圧及び出力電流が、車両３が要求する充電電圧及び充電電流となるように第１の充電器１０の変換器２２を動的に制御する。 As the charging of the power storage device 12 by the second charger 11 progresses, the current flowing from the second charger 11 to the power storage device 12 gradually decreases. Therefore, the control unit 23 of the first charger 10 controls the output voltage and the output current of the charging device 1 in consideration of the decrease in the current flowing through the power storage device 12.
Specifically, the control unit 23 of the first charger 10 receives the current value of the current flowing through the power storage device 12 from the BMS 31 of the power storage device 12 at predetermined time intervals, and the first charger 10 and the second charger 10 receive the current value at predetermined time intervals. The converter 22 of the first charger 10 is dynamically controlled so that the output voltage and output current combined with the charger 11 become the charging voltage and charging current required by the vehicle 3.

すなわち、第１の充電器１０の制御部２３は、充電装置１の出力電圧及び出力電流が充電情報に応じた出力電圧及び出力電流となるよう、第２の充電器１１から蓄電装置１２に流れる電流の変化に応じて第１の充電器１０の変換器２２を制御する。このため、第２の充電器１１から蓄電装置１２に流れる電流が変化しても車両３に一定の出力電圧及び出力電流を供給できる。 That is, the control unit 23 of the first charger 10 flows from the second charger 11 to the power storage device 12 so that the output voltage and output current of the charging device 1 become the output voltage and output current corresponding to the charging information. The converter 22 of the first charger 10 is controlled according to the change in the current. Therefore, even if the current flowing from the second charger 11 to the power storage device 12 changes, a constant output voltage and output current can be supplied to the vehicle 3.

（３－２）第２の接続形態
図６に示すように、第２の接続形態では第１の切替スイッチ１４が接点Ａに接続され、第２の切替スイッチ１５が接点Ｃに接続され、スイッチ１６がオンにされる。すなわち、図７に模式的に示すように、第２の接続形態では第１の充電器１０と第２の充電器１１とが並列に接続され、それらの充電器に対して充電電流の流れ方向（図中において矢印４２で示す方向）の下流側に蓄電装置１２が直列に接続される。蓄電装置１２はそれらの充電器に対して充電電流の流れ方向の上流側に直列に接続されてもよい。 (3-2) Second Connection Form As shown in FIG. 6, in the second connection form, the first changeover switch 14 is connected to the contact A, the second changeover switch 15 is connected to the contact C, and the switch is switched. 16 is turned on. That is, as schematically shown in FIG. 7, in the second connection mode, the first charger 10 and the second charger 11 are connected in parallel, and the flow direction of the charging current with respect to those chargers. The power storage device 12 is connected in series on the downstream side (direction indicated by the arrow 42 in the figure). The power storage device 12 may be connected in series to those chargers on the upstream side in the flow direction of the charging current.

図６に示すように、充電装置１は以下のような充電電圧、充電電流及び充電電力を要求する車両３が接続された場合に第２の接続形態に切り替えられる。
充電電圧：５００Ｖ未満
充電電流：２００Ａ未満
充電電力：５０ｋＷ以上１００ｋＷ未満 As shown in FIG. 6, the charging device 1 is switched to the second connection mode when a vehicle 3 that requires the following charging voltage, charging current, and charging power is connected.
Charging voltage: less than 500V Charging current: less than 200A Charging power: 50kW or more and less than 100kW

この場合、充電装置１の最大出力電圧、最大出力電流及び最大出力電力は以下のように制御される。
最大出力電圧：５００Ｖ未満
最大出力電流：２００Ａ未満
最大出力電力：１００ｋＷ未満 In this case, the maximum output voltage, maximum output current, and maximum output power of the charging device 1 are controlled as follows.
Maximum output voltage: less than 500V Maximum output current: less than 200A Maximum output power: less than 100kW

図６に示す例では車両３が要求する充電電流が２００Ａ未満である。第１の充電器１０及び第２の充電器１１の最大出力電流は１２５Ａであるので、仮にこれらを直列に接続したとすると最大出力電流が１２５Ａのままとなり、車両３が要求する充電電流を供給できない。これに対し、これらを並列に接続すると最大出力電流は２５０Ａになるので、車両３が要求する充電電流を供給できる。 In the example shown in FIG. 6, the charging current required by the vehicle 3 is less than 200 A. Since the maximum output current of the first charger 10 and the second charger 11 is 125 A, if they are connected in series, the maximum output current remains 125 A, and the charging current required by the vehicle 3 is supplied. Can not. On the other hand, when these are connected in parallel, the maximum output current is 250 A, so that the charging current required by the vehicle 3 can be supplied.

図６に示す例では車両３が要求する充電電圧が５００Ｖ未満である。第１の充電器１０及び第２の充電器１１の最大出力電圧は３００Ｖであるので、車両３が要求する充電電流を供給するために第１の充電器１０と第２の充電器１１とを並列に接続すると出力電圧は３００Ｖのままとなり、電圧が不足する。このため、この場合はこれらの充電器に蓄電装置１２が直列に接続されることによって不足する電圧が補われる。前述したように蓄電装置１２の最大電圧は２５０Ｖであるので、蓄電装置１２を直列に接続すると最大出力電圧は５５０Ｖになり、車両３が要求する充電電圧を供給できる。 In the example shown in FIG. 6, the charging voltage required by the vehicle 3 is less than 500V. Since the maximum output voltage of the first charger 10 and the second charger 11 is 300 V, the first charger 10 and the second charger 11 are used to supply the charging current required by the vehicle 3. When connected in parallel, the output voltage remains at 300V, and the voltage is insufficient. Therefore, in this case, the insufficient voltage is supplemented by connecting the power storage device 12 in series to these chargers. As described above, since the maximum voltage of the power storage device 12 is 250V, when the power storage devices 12 are connected in series, the maximum output voltage becomes 550V, and the charging voltage required by the vehicle 3 can be supplied.

第２の接続形態では蓄電装置１２が放電動作となるので、蓄電装置１２の電圧が徐々に低下する。このため、第１の充電器１０の制御部２３は蓄電装置１２の電圧の低下を考慮して充電装置１の出力電圧及び出力電流を制御する。
具体的には、第１の充電器１０の制御部２３は蓄電装置１２のＢＭＳ３１から蓄電装置１２の電圧値を所定の時間間隔で受信する。そして、第１の充電器１０の制御部２３は、第１の充電器１０と第２の充電器１１とが同じ出力電圧及び同じ出力電流の電力を出力するという条件の下で、第１の充電器１０、第２の充電器１１及び蓄電装置１２を合わせた出力電圧及び出力電流が、車両３から要求された充電電圧及び充電電流となるよう第１の充電器１０及び第２の充電器１１の出力電圧及び出力電流を動的に決定する。
そして、第１の充電器１０の制御部２３は決定した出力電圧及び出力電流となるよう第１の充電器１０の変換器２２を動的に制御し、第２の充電器１１の制御部２３も第１の充電器１０の制御部２３に同調して第２の充電器１１の変換器２２を動的に制御する。 In the second connection mode, the power storage device 12 is in a discharge operation, so that the voltage of the power storage device 12 gradually decreases. Therefore, the control unit 23 of the first charger 10 controls the output voltage and the output current of the charging device 1 in consideration of the voltage drop of the power storage device 12.
Specifically, the control unit 23 of the first charger 10 receives the voltage value of the power storage device 12 from the BMS 31 of the power storage device 12 at predetermined time intervals. Then, the control unit 23 of the first charger 10 first outputs the power of the same output voltage and the same output current to the first charger 10 and the second charger 11. The first charger 10 and the second charger so that the combined output voltage and output current of the charger 10, the second charger 11 and the power storage device 12 become the charging voltage and charging current requested by the vehicle 3. The output voltage and output current of 11 are dynamically determined.
Then, the control unit 23 of the first charger 10 dynamically controls the converter 22 of the first charger 10 so as to have the determined output voltage and output current, and the control unit 23 of the second charger 11 Also dynamically controls the converter 22 of the second charger 11 in synchronization with the control unit 23 of the first charger 10.

すなわち、第１の充電器１０の制御部２３は、充電装置１の出力電圧及び出力電流が充電情報に応じた出力電圧及び出力電流となるよう、蓄電装置１２の電圧の変化に応じて第１の充電器１０の変換器２２及び第２の充電器１１の変換器２２を制御する。このため、蓄電装置１２の電圧が変化しても車両３に一定の出力電圧及び出力電流を供給できる。 That is, the control unit 23 of the first charger 10 responds to changes in the voltage of the power storage device 12 so that the output voltage and output current of the charging device 1 become the output voltage and output current according to the charging information. The converter 22 of the charger 10 and the converter 22 of the second charger 11 are controlled. Therefore, even if the voltage of the power storage device 12 changes, a constant output voltage and output current can be supplied to the vehicle 3.

（３－３）第３の接続形態
図８に示すように、第３の接続形態では第１の切替スイッチ１４が接点Ａに接続され、第２の切替スイッチ１５が接点Ｃに接続され、スイッチ１６がオフにされる。すなわち、図９に模式的に示すように、第３の接続形態では第１の充電器１０と第２の充電器１１とが並列に接続され、蓄電装置１２は切り離される。 (3-3) Third Connection Form As shown in FIG. 8, in the third connection form, the first changeover switch 14 is connected to the contact A, the second changeover switch 15 is connected to the contact C, and the switch is switched. 16 is turned off. That is, as schematically shown in FIG. 9, in the third connection mode, the first charger 10 and the second charger 11 are connected in parallel, and the power storage device 12 is disconnected.

図８に示すように、充電装置１は以下のような充電電圧、充電電流及び充電電力を要求する車両３が接続された場合に第３の接続形態に切り替えられる。
充電電圧：２５０Ｖ未満
充電電流：２００Ａ未満
充電電力：５０ｋＷ未満 As shown in FIG. 8, the charging device 1 is switched to the third connection mode when a vehicle 3 that requires the following charging voltage, charging current, and charging power is connected.
Charging voltage: less than 250V Charging current: less than 200A Charging power: less than 50kW

この場合、充電装置１の最大出力電圧、最大出力電流及び最大出力電力は以下のように制御される。
最大出力電圧：２５０Ｖ未満
最大出力電流：２００Ａ未満
最大出力電力：５０ｋＷ未満 In this case, the maximum output voltage, maximum output current, and maximum output power of the charging device 1 are controlled as follows.
Maximum output voltage: less than 250V Maximum output current: less than 200A Maximum output power: less than 50kW

図８に示す例では車両３が要求する充電電流が２００Ａ未満である。第１の充電器１０及び第２の充電器１１の最大出力電流は１２５Ａであるので、仮にこれらを直列に接続したとすると最大出力電流が１２５Ａのままとなり、車両３が要求する充電電圧を供給できない。これに対し、これらを並列に接続すると最大電流は２５０Ａとなるので、車両３が要求する充電電流を供給できる。 In the example shown in FIG. 8, the charging current required by the vehicle 3 is less than 200 A. Since the maximum output current of the first charger 10 and the second charger 11 is 125 A, if they are connected in series, the maximum output current remains 125 A, and the charging voltage required by the vehicle 3 is supplied. Can not. On the other hand, when these are connected in parallel, the maximum current is 250 A, so that the charging current required by the vehicle 3 can be supplied.

図８に示す例では車両３が要求する充電電圧が２５０Ｖ未満である。第１の充電器１０及び第２の充電器１１の最大出力電圧は３００Ｖであるので、車両３が要求する充電電流を供給するためにこれらを並列に接続しても車両３が要求する充電電圧を供給できる。 In the example shown in FIG. 8, the charging voltage required by the vehicle 3 is less than 250V. Since the maximum output voltage of the first charger 10 and the second charger 11 is 300 V, the charging voltage required by the vehicle 3 even if they are connected in parallel to supply the charging current required by the vehicle 3. Can be supplied.

第３の接続形態では車両の充電電圧が２５０Ｖ未満であり、蓄電装置１２の最大電圧が２５０Ｖであるので、蓄電装置１２の充電状態によっては蓄電装置１２の電圧の方が充電電圧より高くなる。このため、スイッチ１６が閉じていると蓄電装置１２から車両側バッテリに電流が流れる可能性がある。すなわち蓄電装置１２が放電される可能性がある。蓄電装置１２が放電されると、その直後に５０ｋＷ以上の充電電力を要求する車両３が接続された場合に、第２の接続形態に切り替えても蓄電装置１２の電圧が足りずに車両３の蓄電装置を急速充電できない可能性がある。このため、第３の接続形態ではスイッチ１６が開かれて蓄電装置１２が切り離される。これにより蓄電装置１２の放電が防止される。 In the third connection mode, the charging voltage of the vehicle is less than 250V, and the maximum voltage of the power storage device 12 is 250V. Therefore, the voltage of the power storage device 12 is higher than the charging voltage depending on the charging state of the power storage device 12. Therefore, when the switch 16 is closed, a current may flow from the power storage device 12 to the vehicle-side battery. That is, the power storage device 12 may be discharged. Immediately after the power storage device 12 is discharged, if a vehicle 3 that requires a charging power of 50 kW or more is connected, the voltage of the power storage device 12 is insufficient even if the second connection mode is switched to, and the vehicle 3 It may not be possible to charge the power storage device quickly. Therefore, in the third connection mode, the switch 16 is opened and the power storage device 12 is disconnected. This prevents the power storage device 12 from being discharged.

（４）接続形態の切り換え
第１の充電器１０の制御部２３は、充電コネクタ１３が車両３に接続されると、車両３のＥＣＵから充電情報（充電電圧値及び充電電流値）を受信する。第１の充電器１０の制御部２３は受信した充電情報から車両３が要求する充電電力を特定し、車両３が要求する充電電力が５０ｋＷ以上の場合は充電装置１を第２の接続形態に切り替える。 (4) Switching of connection form When the charging connector 13 is connected to the vehicle 3, the control unit 23 of the first charger 10 receives charging information (charging voltage value and charging current value) from the ECU of the vehicle 3. .. The control unit 23 of the first charger 10 identifies the charging power required by the vehicle 3 from the received charging information, and when the charging power required by the vehicle 3 is 50 kW or more, the charging device 1 is set to the second connection form. Switch.

車両３が要求する充電電力が５０ｋＷ未満の場合は、第１の充電器１０の制御部２３は車両３が要求する充電電圧が蓄電装置１２の電圧（２５０Ｖ）より高いか低いかを判断し、高い場合は第２の充電器１１によって蓄電装置１２を充電するために第１の接続形態に切り替える。一方、車両３が要求する充電電圧が蓄電装置１２の電圧より低い場合は、第１の充電器１０の制御部２３は蓄電装置１２を切り離すために第３の接続形態に切り替える。車両３が要求する充電電圧と蓄電装置１２の電圧とが同じである場合は第１の接続形態に切り替えてもよいし、第２の接続形態に切り替えてもよい。 When the charging power required by the vehicle 3 is less than 50 kW, the control unit 23 of the first charger 10 determines whether the charging voltage required by the vehicle 3 is higher or lower than the voltage (250 V) of the power storage device 12. If it is high, the second charger 11 switches to the first connection form in order to charge the power storage device 12. On the other hand, when the charging voltage required by the vehicle 3 is lower than the voltage of the power storage device 12, the control unit 23 of the first charger 10 switches to the third connection form in order to disconnect the power storage device 12. When the charging voltage required by the vehicle 3 and the voltage of the power storage device 12 are the same, the connection mode may be switched to the first connection mode or the second connection mode may be switched to.

（５）実施形態の効果
充電装置１によると、車両３のＥＣＵから充電情報を受信し、受信した充電情報に応じて充電装置１の出力電力を５０ｋＷ未満（外部電源から供給される電力以下の出力電力）又は５０ｋＷ以上（外部電源から供給される電力より高い出力電力）に切り替えるので、５０ｋＷ未満の充電電力を要求する車両３と５０ｋＷ以上の充電電力を要求する車両３とが混在しても一の充電装置１によってそれらの車両３の車両側バッテリを急速充電できる。このため、車両３が要求する充電電力毎に充電装置１を用意する場合に比べて充電装置１のコストや設置スペースを低減できる。
充電装置１によると、蓄電装置１２の数を変更することによって出力電力を変更することが可能であるので、充電装置１への入力電力はそのままで、求められる出力電力の変化に対応できる。
充電装置１によると、入力された電力以上の電力を出力できるので、家庭においても従来に比べて容量の大きい蓄電装置を急速充電できる。このため家庭で車両３を充電する場合の利便性も向上する。 (5) Effect of the Embodiment According to the charging device 1, the charging information is received from the ECU of the vehicle 3, and the output power of the charging device 1 is less than 50 kW (less than or equal to the power supplied from the external power source) according to the received charging information. Since it switches to (output power) or 50 kW or more (output power higher than the power supplied from the external power source), even if a vehicle 3 that requires a charge power of less than 50 kW and a vehicle 3 that requires a charge power of 50 kW or more coexist. The vehicle-side battery of those vehicles 3 can be quickly charged by one charging device 1. Therefore, the cost and installation space of the charging device 1 can be reduced as compared with the case where the charging device 1 is prepared for each charging power required by the vehicle 3.
According to the charging device 1, the output power can be changed by changing the number of the storage devices 12, so that the input power to the charging device 1 can be changed as it is, and the required change in the output power can be dealt with.
According to the charging device 1, since it is possible to output more power than the input power, it is possible to quickly charge a power storage device having a larger capacity than before even at home. Therefore, the convenience when charging the vehicle 3 at home is also improved.

充電装置１によると、充電情報に応じて第１の充電器１０及び第２の充電器１１の出力電圧及び出力電流を制御するので、車両３ごとに適切な電圧値及び電流値の充電電力を供給できる。 According to the charging device 1, since the output voltage and the output current of the first charger 10 and the second charger 11 are controlled according to the charging information, the charging power having an appropriate voltage value and current value is set for each vehicle 3. Can be supplied.

充電装置１によると、車両３が要求する充電電力が５０ｋＷ未満の場合は第１の接続形態に切り替えることによって車両３が要求する充電電力を供給できる。一方、車両３が要求する充電電力が５０ｋＷ以上の場合は第２の接続形態に切り替えることによって車両３が要求する充電電力を供給できる。 According to the charging device 1, when the charging power required by the vehicle 3 is less than 50 kW, the charging power required by the vehicle 3 can be supplied by switching to the first connection mode. On the other hand, when the charging power required by the vehicle 3 is 50 kW or more, the charging power required by the vehicle 3 can be supplied by switching to the second connection mode.

充電装置１によると、内部電源は蓄電装置１２であり、第１の接続形態に切り替えられているときに第２の充電器１１によって蓄電装置１２が充電される。このため、第２の接続形態に切り替えたときに蓄電装置１２の電圧が低いことによって車両側バッテリを急速充電できない可能性を低減できる。 According to the charging device 1, the internal power source is the power storage device 12, and the power storage device 12 is charged by the second charger 11 when the connection mode is switched to the first. Therefore, it is possible to reduce the possibility that the vehicle-side battery cannot be quickly charged due to the low voltage of the power storage device 12 when switching to the second connection mode.

充電装置１によると、第１の接続形態では、第２の充電器１１の出力電圧及び出力電流を一定に制御し、充電装置１の出力電圧及び出力電流が充電情報に応じた出力電圧及び出力電流となるよう、第２の充電器１１から蓄電装置１２に流れる電流の変化に応じて第１の充電器１０を制御するので、第２の充電器１１から蓄電装置１２に流れる電流が変化しても車両３に一定の出力電圧及び出力電流を供給できる。 According to the charging device 1, in the first connection mode, the output voltage and output current of the second charger 11 are controlled to be constant, and the output voltage and output current of the charging device 1 correspond to the charging information. Since the first charger 10 is controlled according to the change in the current flowing from the second charger 11 to the power storage device 12 so as to be a current, the current flowing from the second charger 11 to the power storage device 12 changes. However, a constant output voltage and output current can be supplied to the vehicle 3.

充電装置１によると、第２の接続形態では、充電装置１の出力電圧及び出力電流が充電情報に応じた出力電圧及び出力電流となるよう、蓄電装置１２の電圧の変化に応じて第１の充電器１０及び第２の充電器１１を制御するので、蓄電装置１２の電圧が変化しても車両３に一定の出力電圧及び出力電流を供給できる。 According to the charging device 1, in the second connection mode, the first is made according to the change in the voltage of the power storage device 12 so that the output voltage and the output current of the charging device 1 become the output voltage and the output current according to the charging information. Since the charger 10 and the second charger 11 are controlled, a constant output voltage and output current can be supplied to the vehicle 3 even if the voltage of the power storage device 12 changes.

充電装置１によると、車両３が要求する充電電力が５０ｋＷ未満であり、且つ、車両３が要求する充電電圧が蓄電装置１２の電圧より低い場合は第３の接続形態に切り替えることによって蓄電装置１２を切り離すので、蓄電装置１２から車両側バッテリに放電されることを防止できる。このため、その後に第２の接続形態に切り替えたときに蓄電装置１２の電圧が低いことによって車両側バッテリを急速充電できない可能性を低減できる。 According to the charging device 1, if the charging power required by the vehicle 3 is less than 50 kW and the charging voltage required by the vehicle 3 is lower than the voltage of the power storage device 12, the power storage device 12 is switched to the third connection mode. Therefore, it is possible to prevent the power storage device 12 from being discharged to the vehicle-side battery. Therefore, it is possible to reduce the possibility that the vehicle-side battery cannot be quickly charged due to the low voltage of the power storage device 12 when the connection mode is subsequently switched to the second connection mode.

＜他の実施形態＞
本明細書で開示される技術は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような種々の態様も含まれる。 <Other embodiments>
The techniques disclosed herein are not limited to the embodiments described above and in the drawings, and include, for example, various embodiments such as:

（１）上記実施形態では充電器として第１の充電器１０と第２の充電器１１との２つを備えている場合を例に説明したが、充電器の数はこれに限られない。例えば充電器は１つであってもよいし、３つ以上であってもよい。充電器が１つの場合あるいは３つ以上の場合に充電器と蓄電装置１２とをどのような接続形態に切り替え可能にするかは適宜に決定できる。例えば充電器が１つの場合、充電器と蓄電装置１２とが直列に接続される接続形態、充電器と蓄電装置１２とが並列に接続される接続形態、蓄電装置１２が切り離される接続形態などに切り替えてもよい。 (1) In the above embodiment, the case where two chargers, the first charger 10 and the second charger 11, are provided as an example has been described, but the number of chargers is not limited to this. For example, the number of chargers may be one or three or more. When there is one charger or three or more chargers, it is possible to appropriately determine what kind of connection form the charger and the power storage device 12 can be switched to. For example, when there is one charger, the connection form is such that the charger and the power storage device 12 are connected in series, the charger and the power storage device 12 are connected in parallel, the power storage device 12 is disconnected, and the like. You may switch.

（２）上記実施形態では第１の充電器１０及び第２の充電器１１がそれぞれ制御部２３を備えているが、制御部２３を一つだけ備え、その制御部２３が第１の充電器１０及び第２の充電器１１を制御してもよい。 (2) In the above embodiment, the first charger 10 and the second charger 11 each include a control unit 23, but the control unit 23 is provided with only one control unit 23, and the control unit 23 is the first charger. 10 and the second charger 11 may be controlled.

（３）上記実施形態では蓄電装置１２としてリチウムイオン電池を例に説明したが、蓄電装置１２は鉛蓄電池であってもよい。 (3) Although the lithium ion battery has been described as an example of the power storage device 12 in the above embodiment, the power storage device 12 may be a lead storage battery.

（４）上記実施形態では内部電源として蓄電装置１２を例に説明したが、内部電源はキャパシタであってもよいし、太陽電池でもよい。 (4) In the above embodiment, the power storage device 12 has been described as an example as the internal power source, but the internal power source may be a capacitor or a solar cell.

（５）上記実施形態では充電装置１が蓄電装置１２を一つだけ備えている場合を例に説明したが、複数の蓄電装置１２を備えていてもよい。例えば、充電装置１はリチウムイオン電池と鉛蓄電池とを並列に備えていてもよい。そして、急速充電が必要な車両３の場合はリチウムイオン電池を用いて充電し、急速充電が不要な車両３の場合は鉛蓄電池を用いて充電してもよい。 (5) In the above embodiment, the case where the charging device 1 includes only one power storage device 12 has been described as an example, but a plurality of power storage devices 12 may be provided. For example, the charging device 1 may include a lithium ion battery and a lead storage battery in parallel. Then, the vehicle 3 that requires quick charging may be charged using a lithium ion battery, and the vehicle 3 that does not require quick charging may be charged using a lead storage battery.

（６）上記実施形態では充電装置１が車両３のＥＣＵから充電コネクタ１３を介して有線で充電情報を受信する場合を例に説明したが、無線で受信してもよい。
上記実施形態では充電情報として充電電圧値及び充電電流値を受信する場合を例に説明したが、充電情報は車両３が要求する充電電圧値及び充電電流値を特定可能な情報であればこれに限られない。例えば車種によって充電電圧値及び充電電流値が決まっている場合は、車種を表す情報を充電情報として受信してもよい。
上記実施形態では充電装置１が通信によって充電情報を取得する場合を例に説明したが、充電情報の取得は通信に限定されない。例えば充電装置１に操作部を備え、オペレータが操作部を操作して充電情報を入力することによって充電情報を取得してもよい。 (6) In the above embodiment, the case where the charging device 1 receives the charging information from the ECU of the vehicle 3 by wire via the charging connector 13 has been described as an example, but it may be received wirelessly.
In the above embodiment, the case where the charge voltage value and the charge current value are received as the charge information has been described as an example, but the charge information can be specified as long as the charge voltage value and the charge current value required by the vehicle 3 can be specified. Not limited. For example, when the charging voltage value and the charging current value are determined by the vehicle type, information indicating the vehicle type may be received as charging information.
In the above embodiment, the case where the charging device 1 acquires the charging information by communication has been described as an example, but the acquisition of the charging information is not limited to the communication. For example, the charging device 1 may be provided with an operation unit, and the operator may operate the operation unit to input charging information to acquire charging information.

１…充電装置、２…商用電源（外部電源の一例）、３…車両、１２…蓄電装置（内部電源の一例）、１３…充電コネクタ（取得部の一例）、２２…変換器、２３…制御部 1 ... Charging device, 2 ... Commercial power supply (example of external power supply), 3 ... Vehicle, 12 ... Power storage device (example of internal power supply), 13 ... Charging connector (example of acquisition unit), 22 ... Converter, 23 ... Control Department

Claims (7)

車両に搭載されている車両駆動用の蓄電装置を充電する充電装置であって、
外部電源から供給される交流電力を直流電力に変換する変換器と、
直流電力を供給する内部電源と、
前記蓄電装置の充電電力に関する情報を取得する取得部と、
制御部と、
を備え、
前記変換器と前記内部電源とが接続形態を切り替え可能に接続されており、
前記制御部は、前記取得部によって取得された前記情報に応じて前記変換器と前記内部電源との接続形態を切り替えることにより、当該充電装置の出力電力を前記外部電源から供給される電力以下の出力電力又は前記外部電源から供給される電力より高い出力電力に切り替え、
当該充電装置は前記変換器として第１の変換器と第２の変換器とを備えており、
前記変換器と前記内部電源との接続形態には、
前記第２の変換器と前記内部電源とが並列に接続され、それらに対して前記第１の変換器が充電電流の流れ方向の上流側に直列に接続される第１の接続形態と、
前記第１の変換器と前記第２の変換器とが並列に接続され、それらに対して前記内部電源が充電電流の流れ方向の下流側に直列に接続される第２の接続形態とがあり、
前記制御部は、前記車両が要求する充電電力が前記外部電源から供給される電力以下の場合は前記第１の接続形態に切り替える、充電装置。 It is a charging device that charges the power storage device for driving the vehicle mounted on the vehicle.
A converter that converts AC power supplied from an external power source to DC power,
An internal power supply that supplies DC power,
An acquisition unit that acquires information on the charging power of the power storage device, and
Control unit and
Equipped with
The converter and the internal power supply are connected so that the connection form can be switched.
The control unit switches the connection mode between the converter and the internal power supply according to the information acquired by the acquisition unit, so that the output power of the charging device is equal to or less than the power supplied from the external power source. Switch to output power higher than the output power or power supplied from the external power source ,
The charging device includes a first converter and a second converter as the converter.
The connection form between the converter and the internal power supply is as follows.
A first connection mode in which the second converter and the internal power supply are connected in parallel, and the first converter is connected in series to the upstream side in the flow direction of the charging current.
There is a second connection form in which the first converter and the second converter are connected in parallel, and the internal power supply is connected in series to the downstream side in the flow direction of the charging current. ,
The control unit is a charging device that switches to the first connection mode when the charging power required by the vehicle is equal to or less than the power supplied from the external power source . 車両に搭載されている車両駆動用の蓄電装置を充電する充電装置であって、It is a charging device that charges the power storage device for driving the vehicle mounted on the vehicle.
外部電源から供給される交流電力を直流電力に変換する変換器と、A converter that converts AC power supplied from an external power source to DC power,
直流電力を供給する内部電源と、An internal power supply that supplies DC power,
前記蓄電装置の充電電力に関する情報を取得する取得部と、An acquisition unit that acquires information on the charging power of the power storage device, and
制御部と、Control unit and
を備え、Equipped with
前記変換器と前記内部電源とが接続形態を切り替え可能に接続されており、The converter and the internal power supply are connected so that the connection form can be switched.
前記制御部は、前記取得部によって取得された前記情報に応じて前記変換器と前記内部電源との接続形態を切り替えることにより、当該充電装置の出力電力を前記外部電源から供給される電力以下の出力電力又は前記外部電源から供給される電力より高い出力電力に切り替え、The control unit switches the connection mode between the converter and the internal power supply according to the information acquired by the acquisition unit, so that the output power of the charging device is equal to or less than the power supplied from the external power source. Switch to output power higher than the output power or power supplied from the external power source,
当該充電装置は前記変換器として第１の変換器と第２の変換器とを備えており、The charging device includes a first converter and a second converter as the converter.
前記変換器と前記内部電源との接続形態には、The connection form between the converter and the internal power supply is as follows.
前記第２の変換器と前記内部電源とが並列に接続され、それらに対して前記第１の変換器が充電電流の流れ方向の上流側に直列に接続される第１の接続形態と、A first connection mode in which the second converter and the internal power supply are connected in parallel, and the first converter is connected in series to the upstream side in the flow direction of the charging current.
前記第１の変換器と前記第２の変換器とが並列に接続され、それらに対して前記内部電源が充電電流の流れ方向の下流側に直列に接続される第２の接続形態とがあり、There is a second connection form in which the first converter and the second converter are connected in parallel, and the internal power supply is connected in series to the downstream side in the flow direction of the charging current. ,
前記制御部は、前記車両が要求する充電電力が前記外部電源から供給される電力より高い場合は前記第２の接続形態に切り替える、充電装置。The control unit switches to the second connection mode when the charging power required by the vehicle is higher than the power supplied from the external power source. 請求項１又は請求項２に記載の充電装置であって、
前記変換器は出力電圧及び出力電流が可変であり、
前記制御部は前記情報に応じて前記変換器の出力電圧及び出力電流を制御する、充電装置。 The charging device according to claim 1 or 2 .
The converter has variable output voltage and output current.
The control unit is a charging device that controls the output voltage and output current of the converter according to the information. 請求項１から請求項３のいずれか一項に記載の充電装置であって、
前記内部電源は蓄電装置である、充電装置。 The charging device according to any one of claims 1 to 3 .
The internal power source is a charging device, which is a power storage device. 請求項４に記載の充電装置であって、
前記制御部は、前記第１の接続形態では、前記第２の変換器の出力電圧及び出力電流を一定に制御し、当該充電装置の出力電圧及び出力電流が前記情報に応じた出力電圧及び出力電流となるよう、前記第２の変換器から前記内部電源に流れる電流の変化に応じて前記第１の変換器を制御する、充電装置。 The charging device according to claim 4.
In the first connection mode, the control unit constantly controls the output voltage and output current of the second converter, and the output voltage and output current of the charging device correspond to the information. A charging device that controls the first converter according to a change in the current flowing from the second converter to the internal power source so as to be a current. 請求項４又は請求項５に記載の充電装置であって、
前記制御部は、前記第２の接続形態では、当該充電装置の出力電圧及び出力電流が前記情報に応じた出力電圧及び出力電流となるよう、前記内部電源の電圧の変化に応じて前記第１の変換器及び前記第２の変換器を制御する、充電装置。 The charging device according to claim 4 or 5.
In the second connection mode, the control unit responds to a change in the voltage of the internal power supply so that the output voltage and the output current of the charging device become the output voltage and the output current according to the information. A charging device that controls the converter and the second converter. 請求項４乃至請求項６のいずれか一項に記載の充電装置であって、
前記変換器と前記内部電源との接続形態には、更に、前記第１の変換器と前記第２の変換器とが並列に接続され、前記内部電源が切り離される第３の接続形態があり、
前記制御部は、前記車両が要求する充電電力が前記外部電源から供給される電力以下である場合に、前記車両が要求する充電電圧が前記内部電源の電圧より高い場合は前記第１の接続形態に切り替え、前記内部電源の電圧より低い場合は前記第３の接続形態に切り替える、充電装置。 The charging device according to any one of claims 4 to 6.
The connection form between the converter and the internal power supply further includes a third connection form in which the first converter and the second converter are connected in parallel and the internal power supply is disconnected.
The control unit has the first connection mode when the charging power required by the vehicle is equal to or less than the power supplied from the external power source and the charging voltage required by the vehicle is higher than the voltage of the internal power source. A charging device that switches to the third connection form when the voltage is lower than the voltage of the internal power supply.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012039864A (en) 2010-01-08 2012-02-23 Jfe Engineering Corp Quick charger
JP2012114971A (en) 2010-11-19 2012-06-14 Chugoku Electric Power Co Inc:The Dc power supply, charging equipment for electric vehicle, parallel operating method for dc power supply unit, and charging current control method for electric vehicle
US20120249065A1 (en) 2011-04-01 2012-10-04 Michael Bissonette Multi-use energy management and conversion system including electric vehicle charging
US20140159650A1 (en) 2011-07-15 2014-06-12 HYDRO-QUéBEC Multi-stage quick charging system
JP2015139362A (en) 2014-01-21 2015-07-30 台達電子工業股▲ふん▼有限公司Ｄｅｌｔａ Ｅｌｅｃｔｒｏｎｉｃｓ，Ｉｎｃ． Charger and operation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012039864A (en) 2010-01-08 2012-02-23 Jfe Engineering Corp Quick charger
JP2012114971A (en) 2010-11-19 2012-06-14 Chugoku Electric Power Co Inc:The Dc power supply, charging equipment for electric vehicle, parallel operating method for dc power supply unit, and charging current control method for electric vehicle
US20120249065A1 (en) 2011-04-01 2012-10-04 Michael Bissonette Multi-use energy management and conversion system including electric vehicle charging
US20140159650A1 (en) 2011-07-15 2014-06-12 HYDRO-QUéBEC Multi-stage quick charging system
JP2014521301A (en) 2011-07-15 2014-08-25 ハイドロ−ケベック Multistage fast charging system
JP2015139362A (en) 2014-01-21 2015-07-30 台達電子工業股▲ふん▼有限公司Ｄｅｌｔａ Ｅｌｅｃｔｒｏｎｉｃｓ，Ｉｎｃ． Charger and operation method thereof

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