JP2007152983A - Power control device for vehicle - Google Patents

Power control device for vehicle Download PDF

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JP2007152983A
JP2007152983A JP2005346638A JP2005346638A JP2007152983A JP 2007152983 A JP2007152983 A JP 2007152983A JP 2005346638 A JP2005346638 A JP 2005346638A JP 2005346638 A JP2005346638 A JP 2005346638A JP 2007152983 A JP2007152983 A JP 2007152983A
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vehicle
battery
electric load
state
parking
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Munetaka Mizushina
宗隆 水科
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To ensure an operation of electric load as much as possible while suppressing a lessening function of an on-vehicle battery. <P>SOLUTION: A power control device is provided with the on-vehicle battery for performing power supply to an electric load. While the engine of the vehicle is stopped at the parking time, a state sensor monitors (step 102) a battery state on remaining capacity of the on-vehicle battery. When the on-vehicle battery is not in a deterioration state of low capacity at the parking time, the operation is carried out (step 106) as usual when the operation of the electric load is required. On the other hand, when the on-vehicle battery is in a deterioration state of low capacity at the parking time, the control corresponding to the operation requirement of the electric load is carried out. Specifically, the control device informs a user for the vehicle of the low capacity deterioration of the on-vehicle battery, and performs (step 108) the limitation request of the load operation when the operation request of the electric load is performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、車両用電源制御装置に係り、特に、車両に搭載された電気負荷への電源供給を行う車載バッテリを備える車両用電源制御装置に関する。   The present invention relates to a vehicle power supply control device, and more particularly, to a vehicle power supply control device including an in-vehicle battery that supplies power to an electric load mounted on the vehicle.

従来から、エンジンが停止される車両駐車時に車載バッテリのバッテリ状態をモニタし、そのモニタ結果に応じたタイミングで電気負荷への電源供給のカットを実行する車両用電源制御装置が知られている（例えば、特許文献１参照）。かかる装置においては、車両駐車時に作動する電気負荷への電源供給が、車載バッテリの機能低下に伴ってカットされることとなるため、従って、車載バッテリのバッテリ上がりを防止することができ、駐車後のエンジン始動性を確保することが可能となる。
特開２００３−６３３３０号公報 2. Description of the Related Art Conventionally, there is known a vehicle power supply control device that monitors a battery state of an in-vehicle battery when a vehicle is parked when an engine is stopped, and executes a cut of power supply to an electric load at a timing according to the monitoring result ( For example, see Patent Document 1). In such a device, the power supply to the electric load that operates when the vehicle is parked is cut as the function of the in-vehicle battery is reduced. It becomes possible to ensure the engine startability.
JP 2003-63330 A

しかし、上記従来の装置では、車両駐車後のエンジン始動性を確保するために車両駐車時における車載バッテリの機能低下を抑えることはできても、車両駐車中に新たに生ずる電気負荷の作動要求に対応することは困難である。すなわち、車両駐車時に電気負荷の作動要求が生じた場合に、車載バッテリから新たにその電気負荷へ電源供給を行って電気負荷を作動させることはできず、また、車載バッテリの電圧変動を抑制しつつその電気負荷の作動を確保しようとすれば必要以上に他の電気負荷への電源供給をカットすることが必要となってしまう。   However, in the above-described conventional device, even if it is possible to suppress the deterioration of the function of the in-vehicle battery at the time of parking the vehicle in order to ensure the engine startability after parking the vehicle, It is difficult to respond. That is, when an operation request for an electric load is generated when the vehicle is parked, it is not possible to operate the electric load by newly supplying power to the electric load from the in-vehicle battery, and to suppress voltage fluctuations in the in-vehicle battery. However, if the operation of the electric load is to be ensured, it is necessary to cut off the power supply to other electric loads more than necessary.

また、車載バッテリが低容量状態や劣化状態に至ると、以後、その不安定なバッテリ状態を精度よく検出することは困難である。この点、エンジン始動時に車載バッテリが上記の如き不安定なバッテリ状態にあると、エンジンが始動されたとしても、その時点でのバッテリ状態が適切に検出されないことで、以後、車載バッテリの状態回復を行う処理が遅延し、電気負荷の作動が適切に確保されない事態も生じ得る。   In addition, when the in-vehicle battery reaches a low capacity state or a deteriorated state, it is difficult to accurately detect the unstable battery state thereafter. In this regard, if the in-vehicle battery is in an unstable battery state as described above when the engine is started, even if the engine is started, the battery state at that time is not properly detected. There is a possibility that the process of performing the operation is delayed and the operation of the electric load is not properly ensured.

本発明は、上述の点に鑑みてなされたものであり、車載バッテリの機能低下を抑制しつつ、電気負荷の作動を可能な限り確保することが可能な車両用電源制御装置を提供することを目的とする。   The present invention has been made in view of the above-described points, and provides a vehicle power supply control device that can ensure the operation of an electrical load as much as possible while suppressing a decrease in the function of an in-vehicle battery. Objective.

上記の目的は、電気負荷への電源供給を行う車載バッテリを備える車両用電源制御装置であって、エンジンが停止される車両駐車時に前記車載バッテリのバッテリ状態をモニタする駐車時モニタ手段と、前記駐車時モニタ手段によりモニタされた前記車両駐車時における前記車載バッテリのバッテリ状態に基づいて、電気負荷の作動要求に備えた対応制御を実行する対応制御実行手段と、を備える車両用電源制御装置により達成される。   The above object is a vehicle power supply control device including a vehicle-mounted battery that supplies power to an electric load, and the parking-time monitoring means that monitors the battery state of the vehicle-mounted battery when the vehicle is parked when the engine is stopped, A vehicle power supply control device comprising: response control execution means for executing response control in response to an operation request for an electric load based on a battery state of the in-vehicle battery monitored by the parking monitor means when the vehicle is parked. Achieved.

この態様の発明においては、エンジンが停止される車両駐車時にモニタされた車載バッテリのバッテリ状態に基づいて、電気負荷の作動要求に備えた対応制御が実行される。かかる構成によれば、車両駐車時に電気負荷が作動要求された場合にも、対応制御の実行によって、その電気負荷の作動を確保しつつ車載バッテリの電圧変動などの機能低下の抑制を図ることができると共に、エンジン始動時に車載バッテリのバッテリ状態を検出できなくても、対応制御の実行によって、電気負荷の作動を確保しつつ車載バッテリの状態回復の促進を図ることができる。   In the invention of this aspect, the response control in preparation for the operation request of the electric load is executed based on the battery state of the in-vehicle battery monitored during parking of the vehicle where the engine is stopped. According to such a configuration, even when an electric load is requested to operate when the vehicle is parked, it is possible to suppress functional deterioration such as voltage fluctuation of the in-vehicle battery while ensuring the operation of the electric load by executing the corresponding control. In addition, even if the battery state of the in-vehicle battery cannot be detected at the time of starting the engine, execution of the corresponding control can promote the recovery of the in-vehicle battery state while ensuring the operation of the electric load.

この場合、上記した車両用電源制御装置において、エンジン始動時に前記車載バッテリのバッテリ状態をモニタする始動時モニタ手段を備え、前記対応制御実行手段は、前記始動時モニタ手段によるエンジン始動時における前記車載バッテリのバッテリ状態のモニタが不能である場合に、前記駐車時モニタ手段によりモニタされた前記車両駐車時における前記車載バッテリのバッテリ状態に基づいて、エンジン始動後の電気負荷の作動要求に備えた対応制御を実行することとすれば、エンジン始動時に車載バッテリのバッテリ状態を検出できなくても、対応制御の実行によって、電気負荷の作動を確保しつつ車載バッテリの状態回復の促進を図ることができる。   In this case, the above-described vehicle power supply control device includes start-time monitoring means for monitoring a battery state of the in-vehicle battery when the engine is started, and the corresponding control execution means is the vehicle-mounted state when the engine is started by the start-time monitoring means. When the battery status of the battery is impossible to monitor, the response to the operation request of the electric load after starting the engine based on the battery status of the in-vehicle battery at the time of the vehicle parking monitored by the parking time monitoring means If the control is executed, even if the battery state of the in-vehicle battery cannot be detected when starting the engine, the execution of the corresponding control can promote the recovery of the in-vehicle battery state while ensuring the operation of the electric load. .

また、上記した車両用電源制御装置において、電気負荷は、前記車両駐車時に前記車載バッテリから電源供給される複数の駐車時電気負荷を有し、前記対応制御実行手段は、前記駐車時モニタ手段によりモニタされた前記車両駐車時における前記車載バッテリのバッテリ状態に基づいて、一部の駐車時電気負荷以外の駐車時電気負荷への通常どおりの電源供給を維持しつつ該一部の駐車時電気負荷の作動要求に備えた対応制御を実行することとすれば、車両駐車時において、一部の駐車時電気負荷以外の駐車時電気負荷の通常どおりの作動を確保しつつ、その一部の駐車時電気負荷の作動要求に備えた対応制御の実行によって車載バッテリの電圧変動などの機能低下の抑制を図ることができる。   Moreover, in the above-described vehicle power supply control device, the electric load includes a plurality of parking electric loads that are supplied with power from the in-vehicle battery when the vehicle is parked, and the corresponding control execution means is provided by the parking time monitoring means. Based on the monitored battery state of the on-board battery at the time of parking of the vehicle, while maintaining normal power supply to the parking electric load other than the parking electric load, the partial parking electric load If the response control in preparation for the operation request of the vehicle is executed, when the vehicle is parked, the normal operation of the electric load during parking other than the electric load during parking is ensured as normal, and the partial parking is performed. By executing the corresponding control in preparation for the operation request of the electric load, it is possible to suppress the functional deterioration such as the voltage fluctuation of the vehicle-mounted battery.

尚、上記した車両用電源制御装置において、前記対応制御は、エンジン始動後にオルタネータの調整電圧を上げるもの若しくはエンジンのアイドルアップを行うもの、電気負荷の作動を通常よりも制限するもの、又は車両使用者へ前記車載バッテリのバッテリ状態を通知するものであることとすればよい。   In the above-described vehicle power supply control device, the corresponding control may be one that increases the adjustment voltage of the alternator after the engine is started or performs engine idle-up, one that restricts the operation of the electric load more than usual, or vehicle use What is necessary is just to notify the battery state of the said vehicle-mounted battery to a person.

本発明によれば、車載バッテリの機能低下を抑制しつつ、電気負荷の作動を可能な限り確保することができる。   ADVANTAGE OF THE INVENTION According to this invention, the action | operation of an electrical load is securable as much as possible, suppressing the functional fall of a vehicle-mounted battery.

以下、図面を用いて、本発明の具体的な実施の形態について説明する。図１は、本発明の一実施例である車両に搭載される車両用電源制御装置１０を備えるシステムの構成図を示す。本実施例のシステムは、少なくとも車両エンジンを動力とした通常の車両やハイブリッド車両などに搭載される電源システムである。図１に示す如く、本実施例において、車両用電源制御装置１０は、充放電可能な二次バッテリ（以下、車載バッテリと称す）１２を備えている。車載バッテリ１２は、約１２〜１４ボルト程度の出力電圧を有する例えば鉛バッテリ等である。   Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration diagram of a system including a vehicle power supply control device 10 mounted on a vehicle according to an embodiment of the present invention. The system of the present embodiment is a power supply system mounted on a normal vehicle or a hybrid vehicle that uses at least a vehicle engine as power. As shown in FIG. 1, in this embodiment, the vehicle power supply control device 10 includes a chargeable / dischargeable secondary battery (hereinafter referred to as an in-vehicle battery) 12. The in-vehicle battery 12 is, for example, a lead battery having an output voltage of about 12 to 14 volts.

車載バッテリ１２には、車両のエンジン回転や回生ブレーキにより発電するオルタネータ１４が接続されている。車載バッテリ１２は、オルタネータ１４から発電された電力エネルギが供給されることにより電力を蓄えて充電される。車載バッテリ１２には、また、複数の電気負荷１６が接続されている。電気負荷１６には、エンジン回転時にのみ作動するものとして、例えば空調装置や電動パワーステアリング装置などがあり、また、エンジン停止時にも作動し得るものとして、例えばナビゲーション装置やオーディオ機器，音声や表示により搭乗時のお出迎えを行うボーディング装置やイルミネーション装置，遠隔地にいる車両使用者へ各種情報を提供するリモートサービス装置，車両を監視するセキュリティ装置などがある。車載バッテリ１２は、電気負荷１６の作動時に蓄えている電力エネルギをその電気負荷１６へ供給することにより放電される。電気負荷１６は、車載バッテリ１２やオルタネータ１４から電力供給されることにより作動可能となる。   An in-vehicle battery 12 is connected to an alternator 14 that generates electric power by rotating the engine of the vehicle and regenerative braking. The in-vehicle battery 12 is charged by storing electric power when the electric power energy generated from the alternator 14 is supplied. A plurality of electric loads 16 are also connected to the in-vehicle battery 12. Examples of the electric load 16 that operate only when the engine is rotating include an air conditioner and an electric power steering device, and those that can operate even when the engine is stopped include, for example, a navigation device, audio equipment, voice, and display. There are boarding devices and illumination devices for picking up passengers, remote service devices for providing various information to vehicle users in remote locations, and security devices for monitoring vehicles. The in-vehicle battery 12 is discharged by supplying the electric energy stored in the electric load 16 to the electric load 16. The electric load 16 becomes operable by being supplied with electric power from the in-vehicle battery 12 or the alternator 14.

車両用電源制御装置１０は、また、車両の電源マネジメントを行う電源マネジメント用電子制御ユニット（以下、電マネＥＣＵと称す）２０を備えている。電マネＥＣＵ２０には、車載バッテリ１２の両端電圧、充放電電流、及びバッテリ温度などのバッテリ状態を検知するための状態センサ２２が接続されている。電マネＥＣＵ２０は、状態センサ２２の出力に基づいて、車載バッテリ１２のバッテリ状態を検知し、残存容量などを判定する。   The vehicle power supply control device 10 also includes a power management electronic control unit (hereinafter referred to as an electric management ECU) 20 that performs power management of the vehicle. The electric management ECU 20 is connected to a state sensor 22 for detecting a battery state such as a voltage across the vehicle-mounted battery 12, a charge / discharge current, and a battery temperature. The electric manager ECU 20 detects the battery state of the in-vehicle battery 12 based on the output of the state sensor 22 and determines the remaining capacity and the like.

電マネＥＣＵ２０には、イグニションスイッチ２４が接続されている。イグニションスイッチ２４は、車両運転者の操作などにより、オフ状態、ＡＣＣオン状態、ＩＧオン状態、及びスタータオン状態の何れかに切り替わる。電マネＥＣＵ２０は、イグニションスイッチ２４の状態を判定すると共に、その判定結果から自車両が駐車状態にあるか否かを判別する。   An ignition switch 24 is connected to the electric management ECU 20. The ignition switch 24 is switched to any one of an off state, an ACC on state, an IG on state, and a starter on state by the operation of the vehicle driver. The electric management ECU 20 determines the state of the ignition switch 24 and determines whether or not the host vehicle is in a parking state from the determination result.

電マネＥＣＵ２０には、また、通信線を介してエンジンの状態をコントロールするエンジンＥＣＵ２６が接続されている。電マネＥＣＵ２０は、車載バッテリ１２のバッテリ状態などに基づいて、エンジンＥＣＵ２６に対して後述の如きエンジンのアイドルアップを要求する信号を供給する。エンジンＥＣＵ２６は、水温や吸気温，車速などの各種の情報および電マネＥＣＵ２０からのアイドルアップ要求の有無に基づいて、エンジンへの燃料噴射量や点火時期などを制御してエンジンを所望の状態に駆動する。   The electric management ECU 20 is also connected to an engine ECU 26 that controls the state of the engine via a communication line. The electric management ECU 20 supplies a signal requesting engine idle-up as described later to the engine ECU 26 based on the battery state of the in-vehicle battery 12 and the like. The engine ECU 26 controls the fuel injection amount, ignition timing, and the like to the engine in a desired state based on various information such as the water temperature, the intake air temperature, the vehicle speed, and the presence / absence of an idle-up request from the electric manager ECU 20. To drive.

次に、本実施例のシステムの詳細な動作について説明する。図２は、本実施例の車両用電源制御装置１０において電マネＥＣＵ２０が実行する制御ルーチンの一例のフローチャートを示す。   Next, the detailed operation of the system of this embodiment will be described. FIG. 2 shows a flowchart of an example of a control routine executed by the electric management ECU 20 in the vehicle power supply control device 10 of the present embodiment.

本実施例のシステムにおいて、電気負荷１６（エンジン停止時にも作動し得るものに限る）は、その作動要求がエンジン停止時になされた場合、車載バッテリ１２から電力供給を受けることによって、その作動が可能となる。電マネＥＣＵ２０は、常にイグニションスイッチ２４の状態を判定する。その結果、イグニションスイッチ２４がエンジンが停止されるオフ状態又はＡＣＣオン状態にあるすなわち車両駐車時と判定する場合（ステップ１００における肯定判定時）は、エンジン停止直後から所定時間（例えば１時間など）ごとに、状態センサ２２の出力に基づいて電気負荷１６へ電力供給を行い得る車載バッテリ１２のバッテリ状態・残存容量を判定する（ステップ１０２）。そして、順次、各タイミングでの車載バッテリ１２の判定結果を内部メモリに記憶していく。   In the system of this embodiment, the electrical load 16 (limited to those that can operate even when the engine is stopped) can be operated by receiving power supply from the in-vehicle battery 12 when the operation request is made when the engine is stopped. It becomes. The electric management ECU 20 always determines the state of the ignition switch 24. As a result, when the ignition switch 24 is in an off state where the engine is stopped or in an ACC on state, that is, when it is determined that the vehicle is parked (when affirmative determination is made in step 100), a predetermined time (for example, 1 hour) immediately after the engine is stopped. Every time, the battery state / remaining capacity of the in-vehicle battery 12 that can supply power to the electric load 16 is determined based on the output of the state sensor 22 (step 102). And the determination result of the vehicle-mounted battery 12 at each timing is sequentially stored in the internal memory.

また、電マネＥＣＵ２０は、予め、エンジン停止時に作動し得る電気負荷１６ごとに、車載バッテリ１２からの電力供給だけでその作動が少なくともある程度の期間だけ確保される車載バッテリ１２のバッテリ状態や残存容量のしきい値を格納している。尚、このしきい値は、少なくともエンジン始動を一回行うのに必要なものに、当該電気負荷１６の作動を所定の期間だけ実施するのに必要なものを加えた値である。電マネＥＣＵ２０は、エンジン停止後、現に判定された結果得られた車両駐車時における車載バッテリ１２のバッテリ状態等を、格納する電気負荷１６ごとに対応するすべてのしきい値と比較する（ステップ１０４）。   Further, the electric management ECU 20 preliminarily stores the battery state and the remaining capacity of the in-vehicle battery 12 in which the operation is ensured for at least a certain period only by supplying power from the in-vehicle battery 12 for each electric load 16 that can operate when the engine is stopped. The threshold value is stored. This threshold value is a value obtained by adding at least one necessary for performing the operation of the electric load 16 for a predetermined period to the one necessary for starting the engine once. The electric management ECU 20 compares the battery state of the in-vehicle battery 12 when the vehicle is parked, which is obtained as a result of the current determination after the engine is stopped, with all threshold values corresponding to the stored electric loads 16 (step 104). ).

その結果、電マネＥＣＵ２０は、車両駐車時における車載バッテリ１２のバッテリ状態等が何れの電気負荷１６に対応するしきい値よりも高容量側にある場合は、以後の車両駐車時において、何れの電気負荷１６が作動要求されても、その電気負荷１６に対して何ら負荷作動の禁止要求や制限要求などの処理を行わない（ステップ１０６）。この場合には、電気負荷１６は、車両駐車時において作動要求されると、以後通常どおり、車載バッテリ１２から電力供給を受けて作動することとなる。   As a result, when the battery state of the in-vehicle battery 12 at the time of parking the vehicle is higher than the threshold value corresponding to any electrical load 16, the electric management ECU 20 Even if the electric load 16 is requested to operate, no processing such as a load operation prohibition request or a restriction request is performed on the electric load 16 (step 106). In this case, when the operation is requested when the vehicle is parked, the electric load 16 is operated by receiving power supply from the in-vehicle battery 12 as usual thereafter.

一方、電マネＥＣＵ２０は、車両駐車時における車載バッテリ１２のバッテリ状態等が何れかの電気負荷１６に対応するしきい値よりも低容量側になった場合は、リモートサービス装置を起動して、遠隔の車両使用者へ車載バッテリ１２に容量低下や劣化が生じていることを通知する処理を行う（ステップ１０８）。この場合、車両使用者は、車両駐車時における車載バッテリ１２のバッテリ状態等が電気負荷１６の作動を十分に実施することができないものになっていることを知ることができる。   On the other hand, when the battery state of the in-vehicle battery 12 when the vehicle is parked is lower than the threshold value corresponding to any of the electric loads 16, the electric management ECU 20 activates the remote service device, A process of notifying the remote vehicle user that the capacity reduction or deterioration has occurred in the in-vehicle battery 12 is performed (step 108). In this case, the vehicle user can know that the battery state of the in-vehicle battery 12 when the vehicle is parked cannot sufficiently operate the electric load 16.

かかる構成によれば、エンジンが停止される車両駐車時において、少なくとも特定の一部の電気負荷１６の作動を通常どおり行うことができない程に車載バッテリ１２が低容量・劣化状態になったとき、遠隔地にいる車両使用者に、車両において車載バッテリ１２が低容量或いは劣化状態になったこと、ひいては、その車載バッテリ１２の状態に起因してその特定の電気負荷１６の作動を通常どおり行うことができなくなったことを知らせることができ、以後、車載バッテリ１２のバッテリ上がり防止のため車載機器のリモート操作などの行動を抑止させることが可能となり、また、直ちに車載バッテリ１２の状態回復を図る行動を取らせることが可能となる。   According to such a configuration, when the vehicle-mounted battery 12 is in a low capacity / degraded state such that at least a specific part of the electric load 16 cannot be normally operated when the vehicle is parked when the engine is stopped. For a vehicle user at a remote location, the operation of the specific electric load 16 is performed as usual due to the fact that the in-vehicle battery 12 is in a low capacity or deteriorated state in the vehicle, and consequently the state of the in-vehicle battery 12. Can prevent the vehicle battery 12 from running out of the battery, and can prevent the remote operation of the vehicle device from being remotely controlled, and can immediately recover the state of the vehicle battery 12. Can be removed.

また、電マネＥＣＵ２０は、車両駐車時における車載バッテリ１２のバッテリ状態等が何れかのしきい値よりも低容量側にある場合は、以後の車両駐車時において、そのしきい値に対応する電気負荷１６以外の電気負荷１６が作動要求された際には、その電気負荷１６に対して通常どおりの作動要求を行う一方で、そのしきい値に対応する電気負荷１６が作動要求された際には、その電気負荷１６に対して負荷作動の制限要求若しくは禁止要求を行う（ステップ１０８）。この場合、特定の電気負荷１６は、車両駐車時において作動要求されると、以後、車載バッテリ１２から供給される電力が時間的或いは量的に制限され或いは禁止されることとなり、その作動が通常よりも制限され或いは禁止されることとなる。例えば、オーディオ装置の再生が所定時間経過後に強制的に停止され、ボーディング装置による搭乗時のお出迎え機能が禁止される。   Further, when the battery state of the in-vehicle battery 12 at the time of parking of the vehicle is on a lower capacity side than any threshold value, the electric management ECU 20 determines the electric power corresponding to the threshold value at the time of subsequent parking of the vehicle. When an electric load 16 other than the load 16 is requested to operate, a normal operation request is made to the electric load 16 while an electric load 16 corresponding to the threshold is requested to operate. Makes a load operation restriction request or prohibition request to the electrical load 16 (step 108). In this case, if the specific electric load 16 is requested to operate when the vehicle is parked, thereafter, the power supplied from the in-vehicle battery 12 is limited or prohibited in terms of time or quantity, and the operation is normally performed. It will be more limited or prohibited. For example, the reproduction of the audio device is forcibly stopped after a predetermined time has elapsed, and the greeting function at the time of boarding by the boarding device is prohibited.

かかる処理によれば、エンジンが停止される車両駐車時に電気負荷１６が作動し始める状況において、特定の電気負荷１６の作動を通常どおり行うことができない程に車載バッテリ１２が低容量・劣化状態にあるとき、その特定の電気負荷１６以外の電気負荷１６への電源供給を通常どおり行ってその作動を確保することができる一方、その特定の電気負荷１６の作動の制限或いは禁止によって消費電気量を減少させ若しくは削減することができるので、その特定の電気負荷１６の作動制限によって電気負荷１６の作動をある程度の時間或いはある程度の範囲内で確保することができる。   According to such a process, in a situation where the electric load 16 starts to operate when the vehicle is parked when the engine is stopped, the in-vehicle battery 12 is in a low capacity / degraded state so that the specific electric load 16 cannot be operated as usual. In some cases, the power supply to the electric loads 16 other than the specific electric load 16 can be performed as usual to ensure the operation, while the electric power consumption can be reduced by restricting or prohibiting the operation of the specific electric load 16. Since the electric load 16 can be reduced or reduced, the operation of the electric load 16 can be ensured within a certain period of time or within a certain range by the operation limitation of the specific electric load 16.

このため、本実施例の車両用電源制御装置１０によれば、車両駐車時における電気負荷１６の作動による車載バッテリ１２の電圧変動を抑えることができ、その結果として、車載バッテリ１２の電圧変動に起因した電気負荷１６のシステム作動障害の発生を抑制することが可能となっている。また、エンジンが停止される車両駐車時において、電圧変動抑制によって車載バッテリ１２の機能低下を抑制しつつすなわち次のエンジン始動性を確保しつつ、電気負荷１６の作動を可能な限り確保することが可能となっている。   For this reason, according to the vehicle power supply control device 10 of the present embodiment, the voltage fluctuation of the in-vehicle battery 12 due to the operation of the electric load 16 when the vehicle is parked can be suppressed. As a result, the voltage fluctuation of the in-vehicle battery 12 can be reduced. It is possible to suppress the occurrence of the system operation failure of the electrical load 16 caused. Further, when the vehicle is parked when the engine is stopped, it is possible to ensure the operation of the electric load 16 as much as possible while suppressing the function deterioration of the in-vehicle battery 12 by suppressing the voltage fluctuation, that is, ensuring the next engine startability. It is possible.

また、本実施例のシステムにおいて、電気負荷１６は、その作動要求がエンジン駆動時になされた場合、車載バッテリ１２又は車載バッテリ１２に接続するオルタネータ１４から電力供給を受けることによって、その作動が可能となる。電マネＥＣＵ２０は、イグニションスイッチ２４の状態を判定した結果として、イグニションスイッチ２４がエンジンが駆動されるＩＧオン状態にある場合すなわち車両非駐車時は常時、状態センサ２２の出力に基づいて電気負荷１６へ電力供給を行い得る車載バッテリ１２のバッテリ状態・残存容量を判定する（ステップ１１０）。   In the system of this embodiment, when the operation request is made when the engine is driven, the electric load 16 can be operated by receiving power supply from the in-vehicle battery 12 or the alternator 14 connected to the in-vehicle battery 12. Become. As a result of determining the state of the ignition switch 24, the electric management ECU 20 determines that the electric load 16 is always based on the output of the state sensor 22 when the ignition switch 24 is in the IG on state where the engine is driven, that is, when the vehicle is not parked. The battery state / remaining capacity of the in-vehicle battery 12 that can be supplied with power is determined (step 110).

その結果、車両の現走行状態（オルタネータ１４の発電状態を含む）や電気負荷１６の現作動状態に対して車載バッテリ１２が低容量状態若しくは劣化状態にないと判定するとき（ステップ１１２における肯定判定かつステップ１１４における否定判定時）は、以後、オルタネータ１４やエンジンＥＣＵ２６に対して調整電圧アップ要求やアイドルアップ要求を行わず、また、何れの電気負荷１６が作動要求されても、その電気負荷１６に対して何ら負荷作動の禁止要求や制限要求などの処理を行わない（ステップ１１６）。この場合には、電気負荷１６は、エンジンが駆動する車両非駐車時において作動要求されると、以後通常どおり、車載バッテリ１２又はオルタネータ１４から電力供給を受けて作動することとなる。   As a result, when it is determined that the in-vehicle battery 12 is not in a low capacity state or a deteriorated state with respect to the current running state of the vehicle (including the power generation state of the alternator 14) and the current operating state of the electric load 16 (affirmative determination in step 112) In the case of negative determination in step 114), no adjustment voltage increase request or idle increase request is made to the alternator 14 or the engine ECU 26, and any electric load 16 is requested to operate. However, no processing such as a load operation prohibition request or a restriction request is performed (step 116). In this case, when the operation is requested when the vehicle driven by the engine is not parked, the electric load 16 is operated after receiving power supply from the in-vehicle battery 12 or the alternator 14 as usual.

一方、車両の現走行状態（オルタネータ１４の発電状態を含む）や電気負荷１６の現作動状態に対して車載バッテリ１２が低容量状態若しくは劣化状態にあると判定するとき（ステップ１１２における肯定判定かつステップ１１４における肯定判定時）は、直ちに、電気負荷１６の作動に備えて、オルタネータ１４に対して調整電圧のアップを要求し、エンジンＥＣＵ２６に対してエンジンのアイドルアップを要求し、又は、作動する電気負荷１６に対してその作動の制限（例えば、ＥＰＳによる目標アシストトルクを下げることなど）若しくは禁止を要求する（ステップ１１８）。尚、この際、その旨を車両乗員に知らせるべく、車載表示ディスプレイにその旨の表示を行い或いはスピーカから音声出力することとしてもよい。   On the other hand, when it is determined that the in-vehicle battery 12 is in a low capacity state or a deteriorated state with respect to the current running state of the vehicle (including the power generation state of the alternator 14) and the current operating state of the electric load 16 (positive determination in step 112) In the case of an affirmative determination in step 114, immediately, in preparation for the operation of the electric load 16, the alternator 14 is requested to increase the adjustment voltage, and the engine ECU 26 is requested to increase the engine idle, or it is activated. The electric load 16 is requested to restrict or prohibit its operation (for example, to lower the target assist torque by EPS) (step 118). At this time, in order to notify the vehicle occupant to that effect, a display to that effect may be displayed on the in-vehicle display or voice output from the speaker.

かかる処理によれば、エンジン駆動時に電気負荷（特に作動に大きな電力を要するＥＰＳや空調装置など）１６が作動する状況において、その電気負荷１６の作動を通常どおりに行うことができない程に車載バッテリ１２が低容量・劣化状態にあるときには、調整電圧アップやアイドルアップによってオルタネータ１４の発電電気量を増大させ、或いは、その電気負荷１６の作動の禁止・制限によって消費電気量が減少させ若しくは削減することができる。このため、本実施例の車両用電源制御装置１０によれば、エンジン駆動時における電気負荷１６の作動による車載バッテリ１２の電圧変動を抑えることができ、その結果として、車載バッテリ１２の電圧変動に起因した各種電気負荷１６のシステム作動障害の発生を抑制することが可能となっている。   According to such processing, in the situation where the electric load (especially EPS or air conditioner which requires a large amount of electric power for operation) 16 is operated when the engine is driven, the on-vehicle battery is not able to perform the operation of the electric load 16 as usual. When 12 is in a low capacity / degraded state, the amount of electricity generated by the alternator 14 is increased by increasing the adjustment voltage or idling, or the amount of electricity consumed is reduced or reduced by prohibiting / limiting the operation of the electric load 16. be able to. For this reason, according to the vehicle power supply control device 10 of the present embodiment, the voltage fluctuation of the in-vehicle battery 12 due to the operation of the electric load 16 when the engine is driven can be suppressed, and as a result, the voltage fluctuation of the in-vehicle battery 12 is reduced. It is possible to suppress the occurrence of the system operation failure of the various electric loads 16 caused.

一方また、電マネＥＣＵ２０は、上記の如く、イグニションスイッチ２４がエンジンが駆動されるＩＧオン状態にある場合は常時、状態センサ２２の出力に基づいて電気負荷１６へ電力供給を行い得る車載バッテリ１２のバッテリ状態・残存容量を判定するが、エンジン始動時や特にジャンプスタート時（自車両の車載バッテリ１２を利用しない、ブースタケーブルで接続された他車などのバッテリを利用したエンジン始動時）は、自車両の車載バッテリ１２が不安定な状態にあるので、その時点でのそのバッテリ状態等を適切に判定することができないおそれがある。   On the other hand, when the ignition switch 24 is in the IG on state where the engine is driven as described above, the electric management ECU 20 can always supply electric power to the electric load 16 based on the output of the state sensor 22. The battery state / remaining capacity of the vehicle is determined, but at the time of engine start and particularly at the time of jump start (when the vehicle is not started using the vehicle battery 12 of the own vehicle, the engine is started using a battery such as another vehicle connected by a booster cable) Since the vehicle-mounted battery 12 of the own vehicle is in an unstable state, there is a possibility that the battery state and the like at that time cannot be appropriately determined.

そこで、電マネＥＣＵ２０は、エンジンフードが開いておりかつエンジン回転数が所定回転数以上である状態が所定時間以上継続したことなどによってジャンプスタートが行われていること等が判定された場合（ステップ１１２における否定判定時）は、状態センサ２２の出力に基づいて車載バッテリ１２のバッテリ状態等を精度よく判定することが困難であると判断し、次に、フェールセーフ処理として、車両駐車時に内部メモリに記憶した車両駐車時における車載バッテリ１２のバッテリ状態等（特に、エンジン始動直前のもの）を読み出す（ステップ１２０）。そして、その読み出したバッテリ状態等に基づいて車載バッテリ１２が低容量状態若しくは劣化状態にあると判定するときは、バッテリ状態が状態センサ２２を用いて正常に検出される場合と同様に、直ちに、オルタネータ１４に対して調整電圧のアップを要求し、エンジンＥＣＵに対してエンジンのアイドルアップを要求し、又は、作動する電気負荷１６に対してその作動の制限（例えば、ＥＰＳによる目標アシストトルクを下げることなど）若しくは禁止を要求する（ステップ１１８）。   Therefore, the electric management ECU 20 determines that the jump start is being performed, for example, because the engine hood is open and the engine speed is equal to or higher than the predetermined speed for a predetermined time (step). 112), it is determined that it is difficult to accurately determine the battery state or the like of the in-vehicle battery 12 based on the output of the state sensor 22. Next, as a fail-safe process, an internal memory is used when the vehicle is parked. The battery state of the in-vehicle battery 12 at the time of parking the vehicle stored in (in particular, the state immediately before starting the engine) is read (step 120). Then, when it is determined that the in-vehicle battery 12 is in a low capacity state or a deteriorated state based on the read battery state or the like, immediately, as in the case where the battery state is normally detected using the state sensor 22, Request the alternator 14 to increase the adjustment voltage, request the engine ECU to increase the engine idle, or limit the operation of the electric load 16 that operates (for example, lower the target assist torque by EPS) Or prohibition is requested (step 118).

かかる処理によれば、エンジン始動時に、エンジン始動後の電気負荷１６の作動を通常どおりに行うことができない程に車載バッテリ１２が低容量・劣化状態にあるか否かの状態センサ２２を用いた判定が困難である状況においては、車両駐車時に車載バッテリ１２が低容量・劣化状態にあると判定されていた場合に限り、調整電圧アップやアイドルアップによってオルタネータ１４の発電電気量を増大させ、或いは、その電気負荷１６の作動の禁止・制限によって消費電気量が減少させ若しくは削減することができる。このため、本実施例の車両用電源制御装置１０によれば、エンジン始動時に状態センサ２２を用いて車載バッテリ１２の状態判定を行うことができなくても、以後、エンジン始動後における電気負荷１６の作動による車載バッテリ１２の電圧変動を適切に抑えることが可能であると共に、また、発電電気量の増大によって車載バッテリ１２の状態の速やかな回復を図ることができるので、電気負荷１６の通常作動を早期に確保させることが可能となっている。   According to such processing, the state sensor 22 is used to determine whether or not the in-vehicle battery 12 is in a low capacity / degraded state so that the electric load 16 cannot be operated normally after the engine is started. In a situation where the determination is difficult, only when it is determined that the in-vehicle battery 12 is in a low capacity / degraded state when the vehicle is parked, the amount of electric power generated by the alternator 14 is increased by adjusting voltage or idling up, or The amount of electricity consumed can be reduced or reduced by prohibiting / limiting the operation of the electric load 16. For this reason, according to the vehicle power supply control device 10 of the present embodiment, even if it is not possible to determine the state of the in-vehicle battery 12 using the state sensor 22 at the time of starting the engine, the electric load 16 after the engine is started thereafter. The voltage fluctuation of the in-vehicle battery 12 due to the operation of the electric load 16 can be appropriately suppressed, and the state of the in-vehicle battery 12 can be promptly recovered by increasing the amount of generated electricity. Can be secured early.

尚、上記の実施例においては、電マネＥＣＵ２０が、図２に示すルーチン中ステップ１０２の処理を実行することにより特許請求の範囲に記載した「駐車時モニタ手段」が、ステップ１１０の処理を実行することにより特許請求の範囲に記載した「始動時モニタ手段」が、ステップ１０４〜１０８及びステップ１１４〜１２０の処理を実行することにより特許請求の範囲に記載した「対応制御実行手段」が、それぞれ実現されている。   In the embodiment described above, the electric manager ECU 20 executes the process of step 102 in the routine shown in FIG. 2, so that the “parking monitoring means” described in the claims executes the process of step 110. By doing so, the “starting time monitoring means” described in the claims executes the processing of steps 104 to 108 and steps 114 to 120, respectively, and the “corresponding control execution means” described in the claims is It has been realized.

ところで、上記の実施例においては、電気負荷１６の作動に備えたリモート通知や作動制限などの処理を、車両駐車時における車載バッテリ１２のバッテリ状態自体に基づいて行うこととしているが、本発明はこれに限定されるものではなく、エンジン停止後からの車両駐車時における車載バッテリ１２のバッテリ状態（例えばバッテリ電圧）の時間変化（或いはその傾き）に基づいて行うこととしてもよい。例えば、車載バッテリ１２がそのバッテリ状態が所定以上に大きく変化する過渡期にあると判断されるときは、電気負荷１６の作動に備えたリモート通知や作動制限を実行することとすればよい。   By the way, in said Example, although it is supposed that processes, such as a remote notification for the operation | movement of the electric load 16, and an operation | movement restriction | limiting, are performed based on the battery state itself of the vehicle-mounted battery 12 at the time of vehicle parking, However, the present invention is not limited to this, and it may be performed based on a time change (or inclination) of the battery state (for example, battery voltage) of the in-vehicle battery 12 when the vehicle is parked after the engine is stopped. For example, when it is determined that the in-vehicle battery 12 is in a transition period in which the battery state changes greatly more than a predetermined value, remote notification or operation restriction in preparation for the operation of the electric load 16 may be executed.

本発明の一実施例である車両用電源制御装置を備えるシステムの構成図である。1 is a configuration diagram of a system including a vehicle power supply control device according to an embodiment of the present invention. 本実施例の車両用電源制御装置において実行される制御ルーチンの一例のフローチャートである。It is a flowchart of an example of the control routine performed in the vehicle power supply control device of the present embodiment.

符号の説明Explanation of symbols

１０ 車両用電源制御装置
１２ 車載バッテリ
１６ 電気負荷
２０ 電マネＥＣＵ
２２ 状態センサ
２４ イグニションスイッチ
２６ エンジンＥＣＵ DESCRIPTION OF SYMBOLS 10 Vehicle power supply control device 12 Vehicle-mounted battery 16 Electric load 20 Electric management ECU
22 Status sensor 24 Ignition switch 26 Engine ECU

Claims (4)

電気負荷への電源供給を行う車載バッテリを備える車両用電源制御装置であって、
エンジンが停止される車両駐車時に前記車載バッテリのバッテリ状態をモニタする駐車時モニタ手段と、
前記駐車時モニタ手段によりモニタされた前記車両駐車時における前記車載バッテリのバッテリ状態に基づいて、電気負荷の作動要求に備えた対応制御を実行する対応制御実行手段と、
を備えることを特徴とする車両用電源制御装置。 A vehicle power supply control device including a vehicle-mounted battery for supplying power to an electric load,
A parking monitoring means for monitoring a battery state of the in-vehicle battery when the vehicle is parked when the engine is stopped;
Response control execution means for executing response control in response to an operation request for an electric load, based on a battery state of the in-vehicle battery at the time of parking the vehicle monitored by the parking time monitoring means;
A vehicle power supply control device comprising: エンジン始動時に前記車載バッテリのバッテリ状態をモニタする始動時モニタ手段を備え、
前記対応制御実行手段は、前記始動時モニタ手段によるエンジン始動時における前記車載バッテリのバッテリ状態のモニタが不能である場合に、前記駐車時モニタ手段によりモニタされた前記車両駐車時における前記車載バッテリのバッテリ状態に基づいて、エンジン始動後の電気負荷の作動要求に備えた対応制御を実行することを特徴とする請求項１記載の車両用電源制御装置。 A start-time monitoring means for monitoring a battery state of the in-vehicle battery at the time of engine start,
The response control execution means is configured to monitor the vehicle-mounted battery at the time of parking the vehicle monitored by the parking-time monitor means when monitoring the battery state of the vehicle-mounted battery at the time of engine start by the start-time monitoring means is impossible. The vehicle power supply control device according to claim 1, wherein a response control in response to an operation request for an electric load after starting the engine is executed based on a battery state. 電気負荷は、前記車両駐車時に前記車載バッテリから電源供給される複数の駐車時電気負荷を有し、
前記対応制御実行手段は、前記駐車時モニタ手段によりモニタされた前記車両駐車時における前記車載バッテリのバッテリ状態に基づいて、一部の駐車時電気負荷以外の駐車時電気負荷への通常どおりの電源供給を維持しつつ該一部の駐車時電気負荷の作動要求に備えた対応制御を実行することを特徴とする請求項１記載の車両用電源制御装置。 The electric load has a plurality of electric loads during parking that are powered from the in-vehicle battery when the vehicle is parked,
The response control execution means is a normal power supply to a parking electric load other than the parking electric load based on the battery state of the on-board battery at the time of parking the vehicle monitored by the parking monitoring means. The vehicle power supply control device according to claim 1, wherein response control in response to an operation request for the partial parking electric load is executed while maintaining supply. 前記対応制御は、エンジン始動後にオルタネータの調整電圧を上げるもの若しくはエンジンのアイドルアップを行うもの、電気負荷の作動を通常よりも制限するもの、又は車両使用者へ前記車載バッテリのバッテリ状態を通知するものであることを特徴とする請求項１乃至３の何れか一項記載の車両用電源制御装置。   The response control is to increase the adjustment voltage of the alternator after the engine is started or to increase the engine idle, to limit the operation of the electric load than usual, or to notify the vehicle user of the battery status of the in-vehicle battery. The vehicle power supply control device according to any one of claims 1 to 3, wherein the vehicle power supply control device is a device.
JP2005346638A 2005-11-30 2005-11-30 Power control device for vehicle Pending JP2007152983A (en)

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* Cited by examiner, † Cited by third party
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JP2008061461A (en) * 2006-09-01 2008-03-13 Auto Network Gijutsu Kenkyusho:Kk Onboard system and electric power supply controller
JP2009089484A (en) * 2007-09-28 2009-04-23 Hitachi Ltd Integrated circuit for battery and power system for vehicle using this integrated circuit for battery
JP2014507920A (en) * 2010-12-21 2014-03-27 ルノー・トラックス Method for controlling power supply system of automobile and power supply system adapted to the method
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JP2016002797A (en) * 2014-06-13 2016-01-12 アイシン精機株式会社 Vehicle equipment control device and control method
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