JP6060397B2 - Vehicle charging system - Google Patents
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Description
本発明は、複数台の電気自動車等の車両を同時に充電する車両用充電システムに関するものである。 The present invention relates to a vehicle charging system for simultaneously charging a plurality of vehicles such as electric vehicles.
電気自動車等の普及に伴い、複数台の車両を同時に充電可能な車両用充電システムへの需要が高まっている。 With the spread of electric vehicles and the like, there is an increasing demand for a vehicle charging system that can charge a plurality of vehicles simultaneously.
従来の複数台同時に充電可能な車両用充電システムは、主に、集合住宅や事業所などへの導入を前提とするものであり、複数台の電気自動車を同時に充電する場合、電気使用量が急激に上昇して契約電力を超過する危険を回避するために、車両用充電システム全体における最大使用電力を予め設定し、その許容範囲内で充電が行われるよう充電制御を行う技術が開示されている(特許文献1)。 Conventional charging systems for vehicles that can be charged at the same time are mainly premised on introduction to apartment houses and business establishments. When charging multiple electric vehicles at the same time, the amount of electricity used is drastically reduced. In order to avoid the danger of exceeding the contract power by rising to the maximum, the maximum power consumption in the entire vehicle charging system is set in advance and charging control is performed so that charging is performed within the allowable range. (Patent Document 1).
従来の充電制御技術として、複数の車両の充電電流の加算値が閾値(<契約電流)を超えた時にCPLT信号を介して充電制御を開始する方法(方法1)や、CPLT信号に基づき充電装置に接続中の車両数を推測し、充電電力の総量を予測して充電制御を行う方法(方法2)が知られている。 As a conventional charging control technique, a method (method 1) for starting charging control via a CPLT signal when the sum of charging currents of a plurality of vehicles exceeds a threshold value (<contract current), or a charging device based on the CPLT signal There is known a method (method 2) in which the number of vehicles connected to the vehicle is estimated and the total amount of charging power is predicted to perform charging control.
しかし、上記方法1では、充電制御を開始するタイミングと、その制御結果が実際の充電電流値に反映されるまでにタイムラグが生じ、この間に、新たな車両が接続されてしまい、充電電力の許容範囲を超過する可能性を否定できない問題があった。また、上記方法2では、CPLT信号の電位変化が車両の接続を示唆している場合であっても、例えば、車両が充電待機状態にあり、実際の充電は行われていない場合等、実際の充電電力値と予測値とにズレが生じやすく、適切な制御が困難であるという問題があった。 However, in the above method 1, a time lag occurs between the timing of starting charging control and the result of the control being reflected in the actual charging current value. During this time, a new vehicle is connected, and the charging power is allowed. There was a problem that could not deny the possibility of exceeding the range. Further, in the above method 2, even when the potential change of the CPLT signal suggests connection of the vehicle, for example, when the vehicle is in a charging standby state and actual charging is not performed, There was a problem that the charge power value and the predicted value are likely to be misaligned, making it difficult to perform appropriate control.
更に、CPLT信号と実際の充電とを結びつける制御システムは複雑になるという問題もある。 Furthermore, there is a problem that a control system that links the CPLT signal and actual charging becomes complicated.
本発明の目的は前記の問題を解決し、複数台の車両を同時に充電する際、必要な充電電力量を適切に把握し、充電電力の許容範囲を超過することなく、かつ、効率よく充電を行うことができる車両用充電システムを、簡易な構成で実現する技術を提供することである。 The object of the present invention is to solve the above-mentioned problem, and when charging a plurality of vehicles at the same time, properly grasp the required amount of charging power and efficiently charge without exceeding the allowable range of charging power. A vehicle charging system that can be performed is provided with a simple configuration.
上記課題を解決するためになされた本発明の充電システムは、複数の電路に車両用充電装置を備えた車両用充電システムであって、
各電路の電流を測定する電流計測手段と、
各車両用充電装置に接続された車両の充電を制御する充電制御部と
各充電制御部を通信手段で接続した制御ユニットとを備え、
該制御ユニット内には、
電流計測手段で計測された充電電流に基づいて、車両用充電装置に接続された車両の充電開始判定をする充電判定手段と、
充電判定手段による充電開始判定を受けて、車両が接続された車両用充電装置について定めた電流仮定値を加算し、総電流仮定値を求める電流加算手段と、
電流加算手段で加算された総電流仮定値が予め定めた設定閾値を超えた際、接続された各車両への充電を停止することなく、接続された各車両の充電制限を行う電流制限手段
を備えることを特徴とするものである。
The charging system of the present invention made to solve the above problems is a vehicle charging system provided with a vehicle charging device on a plurality of electric paths,
Current measuring means for measuring the current of each circuit;
A charging control unit that controls charging of the vehicle connected to each vehicle charging device, and a control unit that connects each charging control unit by communication means,
In the control unit,
Based on the charging current measured by the current measuring means, charging determination means for determining charging start of the vehicle connected to the vehicle charging device;
In response to the charge start determination by the charge determination means, add the current assumption value determined for the vehicle charging device to which the vehicle is connected, current addition means for obtaining a total current assumption value;
Current limiting means for limiting charging of each connected vehicle without stopping charging to each connected vehicle when the total current assumed value added by the current adding means exceeds a preset threshold value. It is characterized by comprising.
請求項2記載の発明は、請求項1記載の充電システムにおいて、接続判定手段は、充電電流が所定値以上の場合、車両の充電が開始されたものとみなして接続判定を行うことを特徴とするものである。 According to a second aspect of the present invention, in the charging system according to the first aspect, when the charging current is equal to or greater than a predetermined value, the connection determining unit determines that the vehicle has started charging and determines the connection. To do.
請求項3記載の発明は、請求項1記載の充電システムにおいて、電流制限手段は、接続された全車両に対して均等に充電制限を行うことを特徴とするものである。 According to a third aspect of the present invention, in the charging system according to the first aspect, the current limiting means limits the charging equally to all connected vehicles.
請求項4記載の発明は、請求項1記載の充電システムにおいて、該制御ユニット内には、更に、充電制限を解除する制限解除手段を備えることを特徴とするものである。 According to a fourth aspect of the present invention, in the charging system according to the first aspect, the control unit further includes a restriction releasing means for releasing the charging restriction.
本発明の車両用充電システムは、各充電装置で計測された充電電流に基づいて、充電装置と車両の接続判定を行うため、CPLT信号と実際の充電とを結びつける制御と異なり、簡易なシステム構成により、新たな接続車両が接続された後、速やかに充電制御を行うことができる。すなわち、本発明によれば、複数台の電気自動車を同時に充電する際、必要な充電電力量を適切に把握し、充電電力の許容範囲を超過することなく、かつ、効率よく充電を行うことができる。 Since the vehicle charging system according to the present invention determines the connection between the charging device and the vehicle based on the charging current measured by each charging device, unlike the control that links the CPLT signal and the actual charging, a simple system configuration Thus, charge control can be performed promptly after a new connected vehicle is connected. That is, according to the present invention, when charging a plurality of electric vehicles at the same time, it is possible to appropriately grasp the necessary amount of charging power and efficiently charge without exceeding the allowable range of charging power. it can.
以下に本発明の好ましい実施形態を示す。 Preferred embodiments of the present invention are shown below.
本発明は、例えば一般住宅や住宅用マンション等に複数設置される車両用充電装置に最適な車両用充電システムであって、複数台の車両を同時に充電する車両用充電システムに関するものである。図1には、当該車両用充電システムの全体説明図を示している。 The present invention relates to a vehicle charging system that is optimal for a plurality of vehicle charging devices installed in, for example, ordinary houses and residential apartments, and relates to a vehicle charging system that charges a plurality of vehicles simultaneously. FIG. 1 is an overall explanatory view of the vehicle charging system.
図1において、2は分電盤、3a〜3cは車両用充電装置、4a〜4cは電気自動車等の車両を示している。分電盤2は主幹母線7を分岐した電路21を介して複数の車両用充電装置3a〜3cへの電力供給を行っている。分電盤2の内部には、充電制限の要否を判定し、車両用充電装置3の充電制御部18に充電制限命令を出力する制御ユニット10が配置され、車両用充電装置3a〜3cの内部に設けた充電制御部18と通信線32で接続されている。なお通信線32は無線であってもよく、制御ユニット10は分電盤2と別個に設けられていてもよい。 In FIG. 1, 2 is a distribution board, 3a-3c is a vehicle charging device, and 4a-4c is a vehicle such as an electric vehicle. The distribution board 2 supplies electric power to the plurality of vehicle charging devices 3 a to 3 c through an electric path 21 branched from the main bus 7. Inside the distribution board 2, a control unit 10 that determines whether or not charge restriction is necessary and outputs a charge restriction command to the charge control unit 18 of the vehicle charging device 3 is arranged, and the vehicle charging devices 3 a to 3 c The charging control unit 18 provided inside is connected to the communication line 32. The communication line 32 may be wireless, and the control unit 10 may be provided separately from the distribution board 2.
各車両用充電装置3a〜3cは、図2に示すように、充電ケーブルを車両に接続して車両を充電する。各車両用充電装置3には充電ケーブルに接続された電路21の開閉を行うリレー17の他、充電ケーブルに内蔵した信号線を介して車両4に送信する充電制御信号(CPLT信号)を生成するCPLT回路を内蔵し、リレー17の開閉制御等を行う充電制御部18や、電路21を流れる充電電流MCを計測する電流計測手段としてCT19を備えている。なお電流計測手段は分電盤2の内部に設けられていてもよい。また本発明において、車両用充電装置3と車両4との接続は、電磁誘導等を用いた非接触充電によって行われるものであってもよい。この場合、充電制御信号は車両用充電装置3と車両4との間で無線通信を用いて行われる。 As shown in FIG. 2, each of the vehicle charging devices 3 a to 3 c connects the charging cable to the vehicle and charges the vehicle. Each vehicle charging device 3 generates a charging control signal (CPLT signal) to be transmitted to the vehicle 4 through a signal line built in the charging cable, in addition to the relay 17 that opens and closes the electric circuit 21 connected to the charging cable. A CPLT circuit is built in, and a charge control unit 18 that performs open / close control of the relay 17 and the like, and a CT 19 as a current measurement unit that measures the charge current MC flowing through the electric circuit 21 are provided. Note that the current measuring means may be provided inside the distribution board 2. In the present invention, the connection between the vehicle charging device 3 and the vehicle 4 may be performed by non-contact charging using electromagnetic induction or the like. In this case, the charge control signal is transmitted between the vehicle charging device 3 and the vehicle 4 using wireless communication.
充電制御部18は、図3に示すように、判定部22とCPLT回路23と通信手段24を備えていて、車両用充電装置3に接続された車両4の充電を制御する。 As shown in FIG. 3, the charging control unit 18 includes a determination unit 22, a CPLT circuit 23, and a communication unit 24, and controls charging of the vehicle 4 connected to the vehicle charging device 3.
通信手段24は、CT19によって計測された充電電流MCを、車両用充電装置3a〜3cの個体識別番号と共に、制御ユニット10に送信する。また制御ユニット10からの充電制限命令を受信する。 The communication means 24 transmits the charging current MC measured by the CT 19 to the control unit 10 together with the individual identification numbers of the vehicle charging devices 3a to 3c. In addition, a charge restriction command is received from the control unit 10.
CPLT回路23は、車両に充電ケーブルが接続され充電する準備が整うと予め定められたデューティ比のCPLT信号を発振する。CPLT信号とは、車両用充電装置3の定格電流TCの大きさに応じて設定されるデューティ比を有するパイロット信号であり、車両4と車両用充電装置3との間で接続状態や車両用充電装置3の許容電流値KCを車両4に通知するものである。デューティ比が大きいほど車両用充電装置3は大きな電流を供給可能であることを意味する。 The CPLT circuit 23 oscillates a CPLT signal having a predetermined duty ratio when a charging cable is connected to the vehicle and preparation for charging is completed. The CPLT signal is a pilot signal having a duty ratio that is set according to the magnitude of the rated current TC of the vehicle charging device 3, and the connection state and vehicle charging between the vehicle 4 and the vehicle charging device 3. The allowable current value KC of the device 3 is notified to the vehicle 4. The larger the duty ratio, the greater the vehicle charging device 3 can supply.
許容電流値KCは、初期値を車両用充電装置3a〜3cの定格電流TCの80%としているが、後述の電流制限手段30からの充電制限命令を受けて変更される。なお車両4は通知された許容電流値KC以下で充電要求を行うように設計されて、充電電流は充電開始から一定時間で許容電流値KC以下の所定値MHCに達し、充電時間中はほぼ所定値MHCが維持される。 The allowable current value KC has an initial value of 80% of the rated current TC of the vehicle charging devices 3a to 3c, but is changed in response to a charge limiting command from the current limiting means 30 described later. The vehicle 4 is designed to make a charge request at the notified allowable current value KC or less, and the charging current reaches a predetermined value MHC below the allowable current value KC within a certain time from the start of charging, and is almost predetermined during the charging time. The value MHC is maintained.
判定部22内には、電流制限手段30の充電制限命令を受けて許容電流値KCの変更を行い、許容電流値KCに対応したデューティ比のCPLT信号を設定する電流設定手段26と、CPLT信号の電位によりリレーを開閉制御する充電制御手段25を有している。 In the determination unit 22, a current setting unit 26 that changes the allowable current value KC in response to a charge limiting command from the current limiting unit 30 and sets a CPLT signal having a duty ratio corresponding to the allowable current value KC, and a CPLT signal Charging control means 25 for controlling the opening and closing of the relay by the potential of
車両用充電装置3a〜3cに車両が接続されると、車両の充電回路(図示せず)の内部抵抗によりCPLT信号の電位が変化し、この電位変化に基づいて、判定部22が、リレー17の閉路判定を行い、リレー17に閉路信号を送信して、車載電池への充電が開始される(モード2制御)。 When the vehicle is connected to the vehicle charging devices 3a to 3c, the potential of the CPLT signal changes due to the internal resistance of the charging circuit (not shown) of the vehicle. Is closed, a closing signal is transmitted to the relay 17, and charging of the in-vehicle battery is started (mode 2 control).
図5に示すように、制御ユニット10の内部には、識別データベース27と、充電判定手段28と、電流加算手段29と、電流制限手段30と、制限解除手段31を備え、図7に示す充電制限処理が、一定時間間隔(例えば5秒)で実行されるとともに、図9に示す充電制限解除処理が、充電制限処理とは異なる一定時間間隔(例えば15秒)で実行されている。制限処理を所定回数(例えば3回)実行したら1回解除処理を実行するものとしてもよい。 As shown in FIG. 5, the control unit 10 includes an identification database 27, a charge determination unit 28, a current addition unit 29, a current limit unit 30, and a limit release unit 31. The restriction process is executed at a constant time interval (for example, 5 seconds), and the charge restriction release process shown in FIG. 9 is executed at a constant time interval (for example, 15 seconds) different from the charge restriction process. If the restriction process is executed a predetermined number of times (for example, 3 times), the release process may be executed once.
識別データベース27には、図6に示すように車両用充電装置3a〜3cの個体識別番号別に定めた電流仮定値ACが保持されている。電流仮定値ACは車両ごとに異なる所定値MHCを、接続した車両用充電装置ごとに仮定した値である。本実施形態では各車両用充電装置の許容電流値KCの初期値としているが、それ以下であれば別の値でもよい。また車両用充電装置が全て同じであれば電流仮定値ACは一律所定値(例えば15A)と定めてもよく、この場合、識別データベースは不要である。 As shown in FIG. 6, the identification database 27 holds assumed current values AC determined for each individual identification number of the vehicle charging devices 3 a to 3 c. The assumed current value AC is a value that assumes a predetermined value MHC that differs for each vehicle for each connected vehicle charging device. In the present embodiment, the initial value of the permissible current value KC of each vehicle charging device is used. If all the vehicle charging devices are the same, the current assumed value AC may be set to a uniform predetermined value (for example, 15 A), and in this case, an identification database is not necessary.
充電判定手段28は、CT19で計測された充電電流MCが一定値MCL(例えば1A)を超えた場合、車両が充電装置に接続され充電が開始されたことを判定する。すなわちモード2制御とは無関係に車両接続判定と充電開始判定を行なうことが可能なため、充電ケーブルを車両に接続と実際の充電との時間的なずれが生じる場合や、制御ユニット10と充電制御部18の間で通信エラーが発生した場合による影響を受けない。 When the charging current MC measured by CT19 exceeds a certain value MCL (for example, 1A), the charging determination unit 28 determines that the vehicle is connected to the charging device and charging is started. That is, the vehicle connection determination and the charge start determination can be performed regardless of the mode 2 control, so that there is a time lag between the connection of the charging cable to the vehicle and the actual charging, or the control unit 10 and the charging control. It is not affected by the occurrence of a communication error between the units 18.
電流加算手段29は、充電判定手段28により充電開始判定がされると、接続車両数Nに1を加算する。同時に電流仮定値ACを加算し、充電電流MCが所定値MHCに達する前に総仮定電流値TACを算出する。 The current adding means 29 adds 1 to the number N of connected vehicles when the charging determination means 28 determines the charging start. At the same time, the assumed current value AC is added, and the total assumed current value TAC is calculated before the charging current MC reaches the predetermined value MHC.
電流制限手段30は、総仮定電流値TACが予め定めた設定閾値TBC(例えば分電盤の主幹定格電流の80%)を越えた時に、充電制御部18に対して充電制限命令を出力する。 The current limiting unit 30 outputs a charge limiting command to the charging control unit 18 when the total assumed current value TAC exceeds a preset threshold value TBC (for example, 80% of the main rated current of the distribution board).
以下、図7により、充電制限処理の動作を説明する。本実施例では説明を単純化するため、分電盤の主幹定格電流40A、設定閾値は32Aに設定されているものとする。また車両用充電装置3a〜3cの電流仮定値ACは全て15Aとし、車両用充電装置3以外の負荷はないものとする。 Hereinafter, the operation of the charging restriction process will be described with reference to FIG. In the present embodiment, in order to simplify the description, it is assumed that the main rated current 40A of the distribution board and the set threshold value are set to 32A. The assumed current values AC of the vehicle charging devices 3 a to 3 c are all 15 A, and there is no load other than the vehicle charging device 3.
充電が開始されると、各車両用充電装置3a〜3cの内部でCT19によって充電電流MCが計測される。充電電流MCは、車両用充電装置3a〜3cの個体識別番号と共に制御ユニット10に送信され、充電判定手段28に入力される(ST1,ST2)。 When charging is started, the charging current MC is measured by the CT 19 inside each of the vehicle charging devices 3a to 3c. The charging current MC is transmitted to the control unit 10 together with the individual identification numbers of the vehicle charging devices 3a to 3c, and is input to the charging determination means 28 (ST1, ST2).
充電判定手段28は、入力された充電電流MCが一定値MCL(例えば1A)以上の場合、車両の充電開始判定を行なう(ST3)。 When the input charging current MC is equal to or greater than a certain value MCL (for example, 1 A), the charging determination unit 28 determines whether to start charging the vehicle (ST3).
電流加算手段29は、充電判定手段28で車両の充電開始判定がなされると、車両用充電システム全体の総接続台数Nに1を加算し、制御ユニット16のメモリに記録する(ST4)。同時に識別データベース27が保持している電流仮定値ACを加算し、総仮定電流値TACを算出する(ST5)。 When the charging determination unit 28 determines that the vehicle charging is started, the current adding unit 29 adds 1 to the total number of connected vehicles N of the entire vehicle charging system and records it in the memory of the control unit 16 (ST4). At the same time, the assumed current value AC held in the identification database 27 is added to calculate the total assumed current value TAC (ST5).
電流制限手段30は、総仮定電流値TACが設定閾値TBCを超えたか否かの判定を行ない(ST6)、設定閾値TBCを超えた場合には接続された各車両への充電を停止することなく、充電制限命令を出力する(ST7)。充電制限命令は充電判定手段28で車両の充電開始判定がなされている車両用充電装置3の全てに対して出力される。 The current limiting means 30 determines whether or not the total assumed current value TAC has exceeded the set threshold value TBC (ST6), and when it exceeds the set threshold value TBC , the charging of each connected vehicle is not stopped. Then, a charge restriction command is output (ST7). The charge restriction command is output to all of the vehicle charging devices 3 for which the charging determination unit 28 determines that charging of the vehicle is started.
充電制限は、接続している全車両に対して均等に行う。ここで、均等とは、許容電流値KCを一定の割合に減少させる制御を意味する。 Charge restrictions are equally applied to all connected vehicles. Here, “equal” means control for reducing the allowable current value KC at a constant rate.
充電制限は、新たな許容電流値KCを設定する。変更した新たな許容電流値KCは、設定閾値TBCを接続台数Nで除した値とする。 The charge limit sets a new allowable current value KC. The changed new allowable current value KC is a value obtained by dividing the set threshold value TBC by the number N of connected devices.
電流制限手段30は、変更した許容電流値KCを各車両用充電装置3a〜3cの充電制御部18に入力してデューティ比を変調させる。車両は許容電流値KCに応じた新たな充電要求を行う。 The current limiting means 30 inputs the changed allowable current value KC to the charging control unit 18 of each of the vehicle charging devices 3a to 3c to modulate the duty ratio. The vehicle makes a new charge request according to the allowable current value KC.
なお、ST2で、入力された充電電流MCが一定値MLC未満の場合、車両の接続されたものとみなさず充電制限処理を終了する。また、ST7で、総電流仮定値TACが設定閾値未満の場合には充電制限を行わず充電制限処理を終了する。 If the input charging current MC is less than the constant value MLC in ST2, the charging restriction process is terminated without considering that the vehicle is connected. In ST7, if the total assumed current value TAC is less than the set threshold value, the charging limitation process is terminated without performing the charging limitation.
図8は車両4a〜4cが順次充電される様子を示すタイムチャートである。 FIG. 8 is a time chart showing how the vehicles 4a to 4c are sequentially charged.
時刻t1で車両4aの充電が開始され、時刻t2で充電電流MCは所定値MHCである15Aに達する。なお時刻t2では車両4bも充電を開始している。このとき総電流仮定値TACは30Aで設定閾値未満であるため、充電制限命令は出力されない。時刻t3では車両4cが充電を開始し、時刻t4で充電電流MCが一定値MLCに達する。時刻t4で算出される総電流仮定値TACは45Aで設定閾値をこえるため、充電を停止することなく、充電制限命令が出力される。 At time t1, charging of the vehicle 4a is started, and at time t2, the charging current MC reaches a predetermined value MHC of 15A. At time t2, the vehicle 4b also starts charging. At this time, the total current assumption value TAC is 30 A, which is less than the set threshold value, so that the charge restriction command is not output. At time t3, the vehicle 4c starts charging, and at time t4, the charging current MC reaches a constant value MLC. Since the assumed total current value TAC calculated at time t4 exceeds the set threshold value at 45A , the charge restriction command is output without stopping charging.
これにより車両用充電装置3aの許容電流値KCが引き下げられる。車両用充電装置3b、3cの許容電流値KCも引き下げられ、車両4b、4cの充電電流MCは所定値MHCの15Aに達することなく充電制限がされる。新たに設定される許容電流値KCは設定閾値TBCを接続台数で除した10.7Aとなる。 As a result, the allowable current value KC of the vehicle charging device 3a is lowered. The allowable current value KC of the vehicle charging devices 3b and 3c is also reduced, and the charging current MC of the vehicles 4b and 4c is limited in charge without reaching the predetermined value MHC of 15A. The newly set allowable current value KC is 10.7 A obtained by dividing the setting threshold value TBC by the number of connected devices.
このように、充電制限を行う対象の車両の特定を計測した充電電流MCで判断するため、CPLT信号と実際の充電とを結びつける制御と異なり、簡易なシステム構成により、新たな接続車両が接続された後、速やかに充電制御を行うことができる。また設定閾値TBCを接続台数で除した値を新たな許容電流値とするため、効率的に充電できる。 In this way, since the determination of the vehicle to be charged is determined by the measured charging current MC, a new connected vehicle is connected with a simple system configuration, unlike the control that links the CPLT signal and the actual charging. After that, charging control can be performed promptly. In addition, since a value obtained by dividing the set threshold TBC by the number of connected devices is set as a new allowable current value, charging can be performed efficiently.
制限解除手段31では、車両4aの充電が満了し車両用充電装置3a〜3cで計測した充電電流MCの総和である総充電電流TMCが設定閾値を下回った場合には、CPLT信号のデューティ比を初期値に戻す制御が行われる。以下、図9により、充電制限解除処理の流れを説明する。 In the restriction release means 31, when the charging of the vehicle 4a has expired and the total charging current TMC, which is the sum of the charging currents MC measured by the vehicle charging devices 3a to 3c, falls below the set threshold, the duty ratio of the CPLT signal is changed. Control to return to the initial value is performed. Hereinafter, the flow of the charge restriction release process will be described with reference to FIG.
車両が接続されている各車両用充電装置3a〜3cの内部でCT19によって計測された充電電流MCが、通信手段24を介して充電判定手段28に入力される(ST101)。 The charging current MC measured by the CT 19 inside each of the vehicle charging devices 3a to 3c to which the vehicle is connected is input to the charging determination unit 28 via the communication unit 24 (ST101).
各車両用充電装置3a〜3cの充電電流MCが加算され、総計測電流TMCが算出される(ST102)。 The charging current MC of each of the vehicle charging devices 3a to 3c is added, and the total measured current TMC is calculated (ST102).
続いて、その加算値と設定閾値TBCとを比較し(ST103)、総計測電流TMCが設定閾値未満であれば、充電制限が解除される(ST104)。充電制限の解除は、許容電流値KCの初期値を各車両用充電装置の電流設定手段26に入力して行われる。 Subsequently, the added value is compared with the set threshold value TBC (ST103), and if the total measured current TMC is less than the set threshold value, the charging restriction is released (ST104). Release of the charging restriction is performed by inputting the initial value of the allowable current value KC to the current setting means 26 of each vehicle charging device.
なお、ST3で、総計測電流TMCが設定閾値TBC以上であれば充電制限を解除せず、充電制限解除処理を終了する(ST105)。 If the total measured current TMC is equal to or greater than the set threshold value TBC in ST3, the charge restriction is not released and the charge restriction release process is terminated (ST105).
なお、上記実施形態では充電制限は、接続している全車両に対して均等に行うものとしているが、特定の車両のみを充電制限の対象としてもよく、充電電流を不均等にしてもよい。例えば対象とする車両は接続時間や充電制限を行うまでの充電量等に基づいて特定し、充電電流は接続時間の短い車両の充電電流を接続時間の長い車両より大きくしてもよい。 In the above embodiment, the charging restriction is performed equally for all connected vehicles. However, only a specific vehicle may be subject to the charging restriction, or the charging current may be made uneven. For example, the target vehicle may be specified based on the connection time, the amount of charge until charging is limited, and the charge current of the vehicle having a short connection time may be larger than that of the vehicle having a long connection time.
1 幹線盤
2 分電盤
3a〜3c 車両用充電装置
4a〜4c 車両
6 一般負荷
7 主幹母線
8a〜8d 分岐線
9 第1の電力計
10 制御ユニット
11 信号線
12 主幹ブレーカ
14a〜14d 電力供給線
15a〜15d 充電制御ブレーカ
16 判定部
17 リレー
18 充電制御部
19 CT
21 電路
22 判定部
23 CPLT回路
24 通信手段
25 充電制御手段
26 電流設定手段
27 識別データベース
28 充電判定手段
29 電流加算手段
30 電流制限手段
31 制限解除手段
32 通信線
DESCRIPTION OF SYMBOLS 1 Trunk board 2 Distribution board 3a-3c Vehicle charging device 4a-4c Vehicle 6 General load 7 Main bus line 8a-8d Branch line 9 First power meter 10 Control unit 11 Signal line 12 Main breaker 14a-14d Power supply line 15a to 15d Charge control breaker 16 Determination unit 17 Relay 18 Charge control unit 19 CT
21 Electric path 22 Determination unit 23 CPLT circuit 24 Communication unit 25 Charging control unit 26 Current setting unit 27 Identification database 28 Charging determination unit 29 Current addition unit 30 Current limiting unit 31 Limit release unit 32 Communication line
Claims (4)
各電路の電流を測定する電流計測手段と、
各車両用充電装置に接続された車両の充電を制御する充電制御部と
各充電制御部を通信手段で接続した制御ユニットとを備え、
該制御ユニット内には、
電流計測手段で計測された充電電流に基づいて、車両用充電装置に接続された車両の充電開始判定をする充電判定手段と、
充電判定手段による充電開始判定を受けて、車両が接続された車両用充電装置について定めた電流仮定値を加算し、総電流仮定値を求める電流加算手段と、
電流加算手段で加算された総電流仮定値が予め定めた設定閾値を超えた際、接続された各車両への充電を停止することなく、接続された各車両の充電制限を行う電流制限手段
を備えることを特徴とする車両用充電システム。 A vehicle charging system including a vehicle charging device on a plurality of electric paths,
Current measuring means for measuring the current of each circuit;
A charging control unit that controls charging of the vehicle connected to each vehicle charging device, and a control unit that connects each charging control unit by communication means,
In the control unit,
Based on the charging current measured by the current measuring means, charging determination means for determining charging start of the vehicle connected to the vehicle charging device;
In response to the charge start determination by the charge determination means, add the current assumption value determined for the vehicle charging device to which the vehicle is connected, current addition means for obtaining a total current assumption value;
Current limiting means for limiting charging of each connected vehicle without stopping charging to each connected vehicle when the total current assumed value added by the current adding means exceeds a preset threshold value. A vehicle charging system comprising:
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