JP5073416B2 - Vehicle power supply - Google Patents

Vehicle power supply Download PDF

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JP5073416B2
JP5073416B2 JP2007219881A JP2007219881A JP5073416B2 JP 5073416 B2 JP5073416 B2 JP 5073416B2 JP 2007219881 A JP2007219881 A JP 2007219881A JP 2007219881 A JP2007219881 A JP 2007219881A JP 5073416 B2 JP5073416 B2 JP 5073416B2
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vehicle battery
voltage value
voltage
vehicle
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JP2009051351A (en
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貴宏 松浦
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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AutoNetworks Technologies Ltd
Sumitomo Electric Industries 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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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E60/10—Energy storage using batteries

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Description

本発明は、エンジンに連動して発電する車載発電機と、車載発電機が発電した電力により充電される車載バッテリと、車載バッテリの電圧を検出する電圧検出手段とを備え、車載バッテリの残容量として残電力量を算出する車両用電源装置に関するものである。   The present invention includes an in-vehicle generator that generates power in conjunction with an engine, an in-vehicle battery that is charged by electric power generated by the in-vehicle generator, and a voltage detection unit that detects a voltage of the in-vehicle battery, and the remaining capacity of the in-vehicle battery The present invention relates to a vehicular power supply device that calculates a remaining power amount.

車両用電源装置では、例えば、山間地のキャンプ場迄、車両でドライブして行き、キャンプ場に到着すると、エンジン停止状態で車載バッテリから、車両外部の照明その他の電気機器の電源を取るような用途が有り、最近は、そのような用途の為に、車載バッテリからの出力コンセントを備える車両も増加している。このような場合、エンジンが停止されているので、車載バッテリは放電するのみであり、ユーザとしては、この後、どれ位の時間、車載バッテリから電源を取ることができるのか（駆動可能時間）知りたいところである。   In a vehicle power supply device, for example, drive to a campsite in a mountainous area, and when the vehicle arrives at the campground, the engine is stopped and an on-board battery is used to power the lighting and other electrical devices outside the vehicle. Recently, there are an increasing number of vehicles equipped with output outlets from in-vehicle batteries for such applications. In such a case, since the engine is stopped, the in-vehicle battery is only discharged, and the user knows how long it can take power from the in-vehicle battery after that (driveable time). It is where you want.

特許文献１には、車載電源から外部負荷へ電力を出力し得る電力出力手段と、電力出力手段により電力が出力される状況下において出力される電力の増加に応じて、車載エンジンのアイドル回転数を通常時に比して増大させるアイドルアップ手段とを備える車両の制御装置が開示されている。
特開２００５−４２５５９号公報 Patent Document 1 discloses a power output means that can output power from an in-vehicle power source to an external load, and an idle speed of the in-vehicle engine according to an increase in the output power in a situation where the power is output by the power output means. There is disclosed a vehicle control device that includes idle-up means for increasing the engine speed as compared with the normal time.
Japanese Patent Laid-Open No. 2005-42559

上述したような用途の場合、車載バッテリの残容量は、バッテリの充放電に伴う分極現象が存在する為、検出するのは容易ではない。また、車載バッテリの満充電状態から積算した充放電電流値に基づき、車載バッテリの残容量を算出する方法があるが、この方法で検出される残容量の単位は、Ａｈ（アンペア時間）であるので、電気機器で通常表示される消費電力単位である電力Ｗ（ワット）に基づいて、電気機器の駆動可能時間は算出できないという問題がある。   In the case of the use as described above, the remaining capacity of the in-vehicle battery is not easy to detect because there is a polarization phenomenon accompanying charging / discharging of the battery. In addition, there is a method for calculating the remaining capacity of the in-vehicle battery based on the charge / discharge current value accumulated from the fully charged state of the in-vehicle battery. The unit of the remaining capacity detected by this method is Ah (ampere time). Therefore, there is a problem that the drivable time of the electric device cannot be calculated based on the electric power W (watt) which is a unit of power consumption normally displayed on the electric device.

本発明は、上述したような事情に鑑みてなされたものであり、第１発明では、車載バッテリの残容量を電力量（ワットアワー）で算出することができる車両用電源装置を提供することを目的とする。
第２，３発明では、エンジン停止中に、車載バッテリに接続された電気負荷の駆動可能時間を算出し表示することができる車両用電源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 circumstances as described above, and the first invention provides a vehicle power supply device capable of calculating the remaining capacity of a vehicle-mounted battery by the amount of electric power (watt hour). Objective.
In the second and third inventions, an object of the present invention is to provide a vehicular power supply device capable of calculating and displaying the drivable time of an electric load connected to an in-vehicle battery while the engine is stopped.

第１発明に係る車両用電源装置は、エンジンに連動して発電する車載発電機と、該車載発電機が発電した電力により充電される車載バッテリと、該車載バッテリの電圧を検出する電圧検出手段とを備えた車両用電源装置において、前記車載バッテリの開放電圧値、及び前記エンジン始動時の車載バッテリの極小電圧値の二乗値の関係に基づき、残容量０に相当する開放電圧値から、満充電に相当する開放電圧値迄、前記二乗値を積算した各積算値を予め記録したテーブルと、満充電に相当する開放電圧値迄の前記積算値と前記車載バッテリの満充電電力量との係数を予め記録した記録手段と、前記エンジンが始動する前に前記電圧検出手段が検出した電圧値を開放電圧値として取得する電圧取得手段と、前記エンジン始動時に前記電圧検出手段が検出した極小電圧値を取得する極小電圧取得手段とを備え、前記電圧取得手段が取得した開放電圧値、又は前記極小電圧取得手段が取得した極小電圧値に対応する積算値を前記テーブルから求め、求めた積算値、及び前記記録手段が記録した係数に基づき、前記車載バッテリの残電力量を算出することを特徴とする。 According to a first aspect of the present invention, there is provided a vehicle power supply device comprising: an in-vehicle generator that generates power in conjunction with an engine; an in-vehicle battery that is charged by the electric power generated by the in-vehicle generator; In the vehicular power supply device comprising: the open-circuit voltage value corresponding to the remaining capacity 0 based on the relationship between the open-circuit voltage value of the on-vehicle battery and the square value of the minimum voltage value of the on-vehicle battery at the start of the engine. A table in which each integrated value obtained by integrating the square value up to an open-circuit voltage value corresponding to charging is recorded in advance, and a coefficient between the integrated value up to the open-circuit voltage value corresponding to full charge and the full charge electric energy of the in-vehicle battery Pre-recorded recording means, voltage acquisition means for acquiring the voltage value detected by the voltage detection means before the engine is started as an open voltage value, and the voltage detection means when the engine is started There a local minimum voltage acquiring means for acquiring a minimum voltage value detected, determined the voltage open-circuit voltage value acquisition means has acquired, or an integrated value corresponding to a minimum voltage value the minimum voltage acquisition unit has acquired from the table The remaining power amount of the in-vehicle battery is calculated based on the obtained integrated value and the coefficient recorded by the recording means.

この車両用電源装置では、車載バッテリが、エンジンに連動して発電する車載発電機により充電され、電圧検出手段が、車載バッテリの電圧を検出する。
車載バッテリの開放電圧値、及びエンジン始動時の車載バッテリの極小電圧値の二乗値の関係に基づき、残容量０に相当する開放電圧値から、満充電に相当する開放電圧値迄、極小電圧値の二乗値を積算した各積算値が、テーブルに予め記録されている。満充電に相当する開放電圧値迄の積算値と車載バッテリの満充電電力量との係数が、記録手段に予め記録されており、エンジンが始動する前に検出した電圧値を開放電圧値として取得し、エンジン始動時に検出した極小電圧値を取得する。取得した開放電圧値、又は取得した極小電圧値に対応する積算値をテーブルから求め、求めた積算値、及び記録されている係数に基づき、車載バッテリの残電力量を算出する。 In this vehicle power supply device, the in-vehicle battery is charged by the in-vehicle generator that generates power in conjunction with the engine, and the voltage detection means detects the voltage of the in-vehicle battery.
Based on the relationship between the open-circuit voltage value of the on-vehicle battery and the square value of the minimum voltage value of the on-vehicle battery at the start of the engine, the minimum voltage value from the open voltage value corresponding to the remaining capacity 0 to the open voltage value corresponding to full charge Each integrated value obtained by integrating the square values of is previously recorded in the table. The coefficient between the integrated value up to the open-circuit voltage value corresponding to full charge and the full-charge power amount of the on-vehicle battery is recorded in advance in the recording means, and the voltage value detected before the engine starts is acquired as the open-circuit voltage value Then, the minimum voltage value detected when the engine is started is acquired. An integrated value corresponding to the acquired open-circuit voltage value or the acquired minimum voltage value is obtained from the table, and the remaining power amount of the in-vehicle battery is calculated based on the obtained integrated value and the recorded coefficient.

第２発明に係る車両用電源装置は、前記車載バッテリの入出力電流値を検出する電流値検出手段を更に備え、前記エンジンが停止した後に、前記電流値検出手段が検出した入出力電流値、前記電圧検出手段が検出した電圧値、及び算出した前記残電力量に基づき、前記車載バッテリの負荷の駆動可能時間を算出し表示するように構成してあることを特徴とする。   The vehicle power supply device according to a second aspect of the present invention further includes current value detection means for detecting an input / output current value of the in-vehicle battery, and the input / output current value detected by the current value detection means after the engine has stopped, Based on the voltage value detected by the voltage detection means and the calculated remaining power amount, the driveable time of the load of the in-vehicle battery is calculated and displayed.

この車両用電源装置では、エンジンが停止した後に検出した車載バッテリの入出力電流値、エンジンが停止した後に検出した電圧値、及び算出した残電力量に基づき、車載バッテリの負荷の駆動可能時間を算出し表示する。   In this vehicle power supply device, the on-vehicle battery load drivable time is determined based on the input / output current value of the in-vehicle battery detected after the engine stops, the voltage value detected after the engine stops, and the calculated remaining power amount. Calculate and display.

第３発明に係る車両用電源装置は、電力値を受入れる手段を更に備え、該手段が受入れた電力値、及び算出した前記残電力量に基づき、前記車載バッテリの負荷の駆動可能時間を算出し表示するように構成してあることを特徴とする。   The power supply device for a vehicle according to the third aspect of the present invention further comprises means for receiving a power value, and calculates a driveable time of the load of the in-vehicle battery based on the power value received by the means and the calculated remaining power amount. It is configured to display.

この車両用電源装置では、ユーザが入力して受入れた電力値、及び算出した残電力量に基づき、車載バッテリの負荷の駆動可能時間を算出し表示する。   In this vehicle power supply device, the driveable time of the load of the in-vehicle battery is calculated and displayed based on the power value input and received by the user and the calculated remaining power amount.

第１発明に係る車両用電源装置によれば、車載バッテリの残容量を電力量（ワットアワー）で算出することができる車両用電源装置を実現することができる。   According to the vehicle power supply device according to the first aspect of the present invention, it is possible to realize a vehicle power supply device that can calculate the remaining capacity of the in-vehicle battery by the electric energy (watt hour).

第２，３発明に係る車両用電源装置によれば、エンジン停止中に、車載バッテリに接続された電気負荷の駆動可能時間を算出し表示することができる車両用電源装置を実現することができる。   According to the vehicular power supply apparatus according to the second and third inventions, it is possible to realize a vehicular power supply apparatus capable of calculating and displaying the drivable time of the electric load connected to the in-vehicle battery while the engine is stopped. .

以下に、本発明をその実施の形態を示す図面に基づき説明する。
図１は、本発明に係る車両用電源装置の実施の形態の要部構成を示すブロック図である。
この車両用電源装置は、オルタネータ（車載発電機、交流発電機）１が、エンジン１５に連動して発電する。その発電電圧は、オルタネータ１に付設されたレギュレータ２が、オルタネータ１の界磁電流を調節することにより定電圧制御され、また昇降圧制御される。 Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof.
FIG. 1 is a block diagram showing a main configuration of an embodiment of a vehicle power supply device according to the present invention.
In this vehicular power supply device, an alternator (on-vehicle generator, AC generator) 1 generates power in conjunction with the engine 15. The generated voltage is controlled at a constant voltage by a regulator 2 attached to the alternator 1 by adjusting a field current of the alternator 1 and is controlled in a step-up / step-down manner.

オルタネータ１が発電した電力は、オルタネータ１内で整流された後、リレーボックス１１内のヒューズＦ０を通じて、車載バッテリ４に充電され、また、車両内の電気負荷に供給される。電流検出器３が、車載バッテリ４の充放電電流値を検出して、電源制御ＥＣＵ（Electronic Control Unit）１２に与え、電源制御ＥＣＵ１２内の電圧検出手段５が、車載バッテリ４の電圧値を取得する。電源制御ＥＣＵ１２にはイグニッションスイッチ１８及びスタータスイッチ１６の各オン／オフ信号が与えられる。   The electric power generated by the alternator 1 is rectified in the alternator 1 and then charged to the in-vehicle battery 4 through the fuse F0 in the relay box 11 and supplied to an electric load in the vehicle. The current detector 3 detects the charge / discharge current value of the in-vehicle battery 4 and supplies it to a power control ECU (Electronic Control Unit) 12, and the voltage detection means 5 in the power control ECU 12 acquires the voltage value of the in-vehicle battery 4. To do. The power control ECU 12 is supplied with respective on / off signals of the ignition switch 18 and the starter switch 16.

電源制御ＥＣＵ１２は、車載バッテリ４の開放電圧値、及びエンジン１５始動時の車載バッテリ４の下限電圧値（極小電圧値）の二乗値の関係に基づき、残容量０に相当する開放電圧値から、満充電に相当する開放電圧値迄、下限電圧値の二乗値を積算した各積算値を予め記録したテーブル１４を備えている。また、満充電に相当する開放電圧値迄のその積算値と車載バッテリ４の満充電電力量との比例係数を予め記録したメモリ２０を備えている。車載バッテリ４の開放電圧値及び残容量の関係は略線形であることが知られている。   Based on the relationship between the open circuit voltage value of the in-vehicle battery 4 and the square value of the lower limit voltage value (minimum voltage value) of the in-vehicle battery 4 when the engine 15 is started, the power control ECU 12 A table 14 is provided in which each integrated value obtained by integrating the square value of the lower limit voltage value up to the open-circuit voltage value corresponding to full charge is recorded in advance. Further, a memory 20 is provided in which a proportional coefficient between the integrated value up to the open-circuit voltage value corresponding to full charge and the full charge power amount of the in-vehicle battery 4 is recorded in advance. It is known that the relationship between the open-circuit voltage value and the remaining capacity of the in-vehicle battery 4 is substantially linear.

車載バッテリ４の開放電圧値ＶＯ、及びエンジン１５始動時の車載バッテリ４の下限電圧値ＶＬ（スタータ１７の突入電圧）の関係は、図２（ａ）に示すような特性であり、開放電圧値ＶＯが高ければ、下限電圧値ＶＬも高くなる。また、開放電圧値ＶＯと下限電圧値ＶＬの二乗値との関係は、図２（ｂ）に示すようになる。   The relationship between the open-circuit voltage value VO of the in-vehicle battery 4 and the lower limit voltage value VL (inrush voltage of the starter 17) of the in-vehicle battery 4 at the start of the engine 15 is a characteristic as shown in FIG. If VO is high, the lower limit voltage value VL is also high. Further, the relationship between the open circuit voltage value VO and the square value of the lower limit voltage value VL is as shown in FIG.

ここで、下限電圧値ＶＬの二乗値は、そのときの電力値ＶＬ2 ／Ｒ（Ｒは車載バッテリ４の内部抵抗値、スタータ１７系統の抵抗値の合計であり一定と見なす）から、電力値に比例するものである。
また、下限電圧値ＶＬの二乗値を、車載バッテリ４の残容量（ＳＯＣ;State Of Charge）０に相当する開放電圧値から、満充電に相当する開放電圧値迄、積算した積算値Ｓ（図２（ｂ）の斜線部のＳＯＣ＝１００％迄の面積に相当）は、各開放電圧値ＶＯにおける出力可能電力に比例する値を合計したものである。 Here, the square value of the lower limit voltage value VL is the power value from the power value VL 2 / R at that time (R is the sum of the internal resistance value of the in-vehicle battery 4 and the resistance value of the starter 17 system and is regarded as constant). Is proportional to
In addition, an integrated value S obtained by integrating the square value of the lower limit voltage value VL from the open-circuit voltage value corresponding to the remaining capacity (SOC) 0 of the in-vehicle battery 4 to the open-circuit voltage value corresponding to full charge (see FIG. 2 (b) corresponds to the area up to SOC = 100% of the shaded area), which is a sum of values proportional to the output power at each open circuit voltage value VO.

従って、積算値Ｓは、車載バッテリ４の残容量に比例すると考えることができる。また、各開放電圧値迄の積算値（図２（ｂ）の斜線部の面積に相当）は、その開放電圧値のときの残容量に比例すると考えることができる。
車載バッテリ４の満充電時の残容量を電力量表示した値Ｅ（残容量Ａｈとバッテリの平均電圧値との乗算値）と積算値Ｓとの比例係数Ｋは、Ｋ＝Ｅ／Ｓとなる。 Therefore, it can be considered that the integrated value S is proportional to the remaining capacity of the in-vehicle battery 4. Further, it can be considered that the integrated value up to each open-circuit voltage value (corresponding to the area of the hatched portion in FIG. 2B) is proportional to the remaining capacity at the open-circuit voltage value.
The proportional coefficient K between the value E (the value obtained by multiplying the remaining capacity Ah and the average voltage value of the battery) and the integrated value S is K = E / S. .

以上から、車載バッテリ４の残容量０の開放電圧値から、満充電の開放電圧値迄、下限電圧値の二乗値を積算した各積算値及び比例係数Ｋを、実測及び計算により求めて、テーブル１４及びメモリ２０に記録しておけば、実測した下限電圧値ＶＬ又は開放電圧値に基づき、そのときの車載バッテリ４の残容量を電力量で
算出することができる。即ち、実測した下限電圧値ＶＬの二乗値又は開放電圧値における積算値に、比例係数Ｋを乗算して、そのときの車載バッテリ４の電力量を算出できる。 From the above, each integrated value obtained by integrating the square value of the lower limit voltage value from the open voltage value of the remaining capacity 0 of the in-vehicle battery 4 to the fully charged open voltage value and the proportionality coefficient K are obtained by actual measurement and calculation, 14 and the memory 20, the remaining capacity of the in-vehicle battery 4 at that time can be calculated as the amount of electric power based on the actually measured lower limit voltage value VL or open circuit voltage value. That is, the electric power of the in-vehicle battery 4 at that time can be calculated by multiplying the square value of the actually measured lower limit voltage value VL or the integrated value in the open-circuit voltage value by the proportional coefficient K.

車載バッテリ４の電力量と、車載バッテリ４に接続された電気負荷の消費電力とが分かれば、電力量／消費電力により電気負荷の駆動可能時間を算出することができる。
電源制御ＥＣＵ１２には、ユーザが出力コンセント１０に接続してある電気負荷の消費電力を入力する為の入力部１９、及び電源制御ＥＣＵ１２が算出した負荷駆動可能時間を表示する為の表示部１３が接続されている。
尚、上述した方法で算出した車載バッテリ４の残容量（残電力量）は、エンジン１５の始動時の値であり、その残容量を実際に使用するのは、エンジン１５が停止した後になるが、エンジン１５が駆動した後は、残容量は増加していると考え、安全側に考えることができる。 If the electric energy of the in-vehicle battery 4 and the electric power consumption of the electric load connected to the in-vehicle battery 4 are known, the drivable time of the electric load can be calculated from the electric energy / power consumption.
The power control ECU 12 includes an input unit 19 for a user to input power consumption of an electrical load connected to the output outlet 10, and a display unit 13 for displaying the load driveable time calculated by the power control ECU 12. It is connected.
Note that the remaining capacity (remaining power amount) of the in-vehicle battery 4 calculated by the above-described method is a value at the start of the engine 15, and the remaining capacity is actually used after the engine 15 is stopped. After the engine 15 is driven, it can be considered that the remaining capacity has increased and can be considered on the safe side.

車載バッテリ４の出力電圧は、例えば、ヒューズＦ１及びリレー６の接点を通じて電気負荷８に、ヒューズＦ２及びリレー７の接点を通じて電気負荷９にそれぞれ印加され、ヒューズＦ３を通じて出力コンセント１０から出力される。また、スタータスイッチ１６によりオン／オフされるスタータ１７にも印加されている。車載バッテリ４の出力電圧は、その他の電気負荷へもそれぞれのヒューズ及びスイッチを通じて印加される。リレー６、７は、スイッチＳＷ１、ＳＷ２によりそれぞれオン／オフされる。   The output voltage of the in-vehicle battery 4 is applied to the electric load 8 through the contact of the fuse F1 and the relay 6, for example, to the electric load 9 through the contact of the fuse F2 and the relay 7, and is output from the output outlet 10 through the fuse F3. The voltage is also applied to a starter 17 that is turned on / off by a starter switch 16. The output voltage of the in-vehicle battery 4 is also applied to other electric loads through the respective fuses and switches. Relays 6 and 7 are turned on / off by switches SW1 and SW2, respectively.

以下に、このような構成の車両用電源装置の動作を、それを示す図３のフローチャートを参照しながら説明する。
電源制御ＥＣＵ１２は、スタータスイッチ１６がオンになる前は（Ｓ３）、電圧検出手段５により車載バッテリ（バッテリ）４の電圧値Ｖを読込み、記憶更新している（Ｓ１）。
電源制御ＥＣＵ１２は、スタータスイッチ１６がオンになると（Ｓ３）、そのときの下限電圧値（極小電圧値）ＶＬを読込む（Ｓ５）。次いで、電圧値Ｖを開放電圧値と見なして、電圧値Ｖ又は下限電圧値ＶＬ（の二乗値）に基づき、テーブル１４を参照して、ＶＬ2 の積算値を求める（Ｓ７）。 The operation of the vehicular power supply apparatus having such a configuration will be described below with reference to the flowchart shown in FIG.
Before the starter switch 16 is turned on (S3), the power control ECU 12 reads the voltage value V of the in-vehicle battery (battery) 4 by the voltage detection means 5 and updates the storage (S1).
When the starter switch 16 is turned on (S3), the power supply control ECU 12 reads the lower limit voltage value (minimum voltage value) VL at that time (S5). Next, the voltage value V is regarded as an open-circuit voltage value, and based on the voltage value V or the lower limit voltage value VL (the square value), the integrated value of VL 2 is obtained with reference to the table 14 (S7).

電源制御ＥＣＵ１２は、次に、求めたＶＬ2 の積算値に、メモリ２０に記録してある比例係数Ｋを掛けて、そのときの車載バッテリ４の残容量（残電力量）を算出し記憶しておく（Ｓ９）。
その後、電源制御ＥＣＵ１２は、イグニッションスイッチ（ＩＧスイッチ）１８がオフになるか否かを判定し続け（Ｓ１１）、イグニッションスイッチ１８がオフになれば（エンジン１５がオフになれば）、電流検出器３が検出した車載バッテリ４の充放電電流値、及び車載バッテリ４の電圧値Ｖを読込む（Ｓ１３）。 Power control ECU12 then, the integrated value of VL 2 was determined by multiplying a proportional coefficient K is recorded in the memory 20, calculates and stores the remaining capacity of the battery 4 at this time (remaining amount of power) (S9).
Thereafter, the power supply control ECU 12 continues to determine whether or not the ignition switch (IG switch) 18 is turned off (S11). If the ignition switch 18 is turned off (if the engine 15 is turned off), the current detector 3 reads the charge / discharge current value of the in-vehicle battery 4 and the voltage value V of the in-vehicle battery 4 detected (S13).

電源制御ＥＣＵ１２は、次に、読込んだ充放電電流値及び電圧値Ｖ（Ｓ１３）に基づき、そのときに車載バッテリ４に接続されている電気負荷の消費電力を算出し、算出した消費電力で、記憶している車載バッテリ４の残容量（残電力量）（Ｓ９）を割って、負荷駆動可能時間を算出する（Ｓ１５）。次いで、算出した負荷駆動可能時間を、表示部１３に表示し（Ｓ１７）、電流検出器３が検出した車載バッテリ４の充放電電流値、及び車載バッテリ４の電圧値Ｖを読込む（Ｓ１３）。   Next, based on the read charge / discharge current value and voltage value V (S13), the power supply control ECU 12 calculates the power consumption of the electric load connected to the in-vehicle battery 4 at that time, and uses the calculated power consumption. Then, the remaining capacity (remaining power amount) (S9) of the stored in-vehicle battery 4 is divided to calculate the load driveable time (S15). Next, the calculated load driveable time is displayed on the display unit 13 (S17), and the charge / discharge current value of the in-vehicle battery 4 detected by the current detector 3 and the voltage value V of the in-vehicle battery 4 are read (S13). .

電源制御ＥＣＵ１２は、負荷駆動可能時間を算出する（Ｓ１５）際、前回のサンプリングで算出した消費電力×サンプリング時間で算出した電力量を残容量から減算して行く。
電源制御ＥＣＵ１２は、負荷駆動可能時間を算出する際、（消費）電力値が入力部１９から入力されていれば、その電力値で、車載バッテリ４の残容量（残電力量）（Ｓ９）を割って、負荷駆動可能時間を算出する（Ｓ１５）。 When calculating the load driveable time (S15), the power supply control ECU 12 subtracts the power consumption calculated by the previous sampling × the sampling time from the remaining capacity from the remaining capacity.
When the power control ECU 12 calculates the load driveable time, if the (consumption) power value is input from the input unit 19, the remaining capacity (remaining power amount) (S9) of the in-vehicle battery 4 is calculated with the power value. By dividing, the load driveable time is calculated (S15).

本発明に係る車両用電源装置の実施の形態の要部構成を示すブロック図である。It is a block diagram which shows the principal part structure of embodiment of the power supply device for vehicles which concerns on this invention. 本発明に係る車両用電源装置の動作を説明する為の説明図である。It is explanatory drawing for demonstrating operation | movement of the vehicle power supply device which concerns on this invention. 本発明に係る車両用電源装置の動作例を示すフローチャートである。It is a flowchart which shows the operation example of the power supply device for vehicles which concerns on this invention.

符号の説明Explanation of symbols

１ オルタネータ（車載発電機、交流発電機）
２ レギュレータ
３ 電流検出器（電流検出手段）
４ 車載バッテリ
５ 電圧検出手段
８，９ 電気負荷
１０ 出力コンセント
１１ リレーボックス
１２ 電源制御ＥＣＵ（電圧取得手段、極小電圧取得手段）
１３ 表示部
１４ テーブル
１５ エンジン
１６ スタータスイッチ
１７ スタータ
１８ イグニッションスイッチ
１９ 入力部（受入れる手段）
２０ メモリ（記録手段） 1 Alternator (on-vehicle generator, AC generator)
2 Regulator 3 Current detector (current detection means)
4 Vehicle-mounted battery 5 Voltage detection means 8, 9 Electrical load 10 Output outlet 11 Relay box 12 Power supply control ECU (voltage acquisition means, minimum voltage acquisition means)
13 Display Unit 14 Table 15 Engine 16 Starter Switch 17 Starter 18 Ignition Switch 19 Input Unit (Accepting Means)
20 memory (recording means)

Claims (3)

エンジンに連動して発電する車載発電機と、該車載発電機が発電した電力により充電される車載バッテリと、該車載バッテリの電圧を検出する電圧検出手段とを備えた車両用電源装置において、
前記車載バッテリの開放電圧値、及び前記エンジン始動時の車載バッテリの極小電圧値の二乗値の関係に基づき、残容量０に相当する開放電圧値から、満充電に相当する開放電圧値迄、前記二乗値を積算した各積算値を予め記録したテーブルと、満充電に相当する開放電圧値迄の前記積算値と前記車載バッテリの満充電電力量との係数を予め記録した記録手段と、前記エンジンが始動する前に前記電圧検出手段が検出した電圧値を開放電圧値として取得する電圧取得手段と、前記エンジン始動時に前記電圧検出手段が検出した極小電圧値を取得する極小電圧取得手段とを備え、前記電圧取得手段が取得した開放電圧値、又は前記極小電圧取得手段が取得した極小電圧値に対応する積算値を前記テーブルから求め、求めた積算値、及び前記記録手段が記録した係数に基づき、前記車載バッテリの残電力量を算出することを特徴とする車両用電源装置。 In a vehicle power supply device comprising an in-vehicle generator that generates power in conjunction with an engine, an in-vehicle battery that is charged by the electric power generated by the in-vehicle generator, and voltage detection means that detects the voltage of the in-vehicle battery.
Based on the relationship between the open-circuit voltage value of the on-vehicle battery and the square value of the minimum voltage value of the on-vehicle battery at the time of starting the engine, from the open voltage value corresponding to the remaining capacity 0 to the open voltage value corresponding to full charge, A table in which each accumulated value obtained by accumulating the square value is recorded in advance; a recording unit in which a coefficient between the accumulated value up to an open-circuit voltage value corresponding to full charge and a full charge power amount of the in-vehicle battery is recorded; and the engine Voltage acquisition means for acquiring the voltage value detected by the voltage detection means before starting as an open voltage value, and minimum voltage acquisition means for acquiring the minimum voltage value detected by the voltage detection means when the engine is started the voltage open-circuit voltage value acquisition means has acquired, or obtains an integrated value corresponding to the minimum voltage value minimum voltage acquisition unit has acquired from the table, the obtained integrated value, and the recording Based on the coefficients stage was recorded, the vehicle power supply device and calculates a remaining power amount of the vehicle battery. 前記車載バッテリの入出力電流値を検出する電流値検出手段を更に備え、前記エンジンが停止した後に、前記電流値検出手段が検出した入出力電流値、前記電圧検出手段が検出した電圧値、及び算出した前記残電力量に基づき、前記車載バッテリの負荷の駆動可能時間を算出し表示するように構成してある請求項１記載の車両用電源装置。   Current value detecting means for detecting an input / output current value of the in-vehicle battery, and after the engine is stopped, an input / output current value detected by the current value detecting means, a voltage value detected by the voltage detecting means, and The vehicular power supply device according to claim 1, configured to calculate and display a drivable time of the load of the in-vehicle battery based on the calculated remaining power amount. 電力値を受入れる手段を更に備え、該手段が受入れた電力値、及び算出した前記残電力量に基づき、前記車載バッテリの負荷の駆動可能時間を算出し表示するように構成してある請求項２記載の車両用電源装置。   The apparatus further comprises means for receiving a power value, and configured to calculate and display a drivable time of the load of the in-vehicle battery based on the power value received by the means and the calculated remaining power amount. The power supply device for vehicles as described.
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