JP2009177887A - Power supply for vehicle - Google Patents

Power supply for vehicle Download PDF

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JP2009177887A
JP2009177887A JP2008011690A JP2008011690A JP2009177887A JP 2009177887 A JP2009177887 A JP 2009177887A JP 2008011690 A JP2008011690 A JP 2008011690A JP 2008011690 A JP2008011690 A JP 2008011690A JP 2009177887 A JP2009177887 A JP 2009177887A
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power
control circuit
battery
power supply
secondary battery
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JP4937146B2 (en
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Takeshi Osawa
岳史 大澤
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Sanyo Electric Co Ltd
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Sanyo Electric Co 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the power consumption of a low-voltage battery in a quiescent state of a control circuit. <P>SOLUTION: A power supply for vehicles includes a high-voltage battery 1, which runs a vehicle, a control circuit 2 for the high-voltage battery 1, a low-voltage battery 3, which supplies the control circuit 2 with operating power, and a power circuit 4, which controls the power supply from the low-voltage battery 3 to the control circuit 2. The control circuit 4 supplies the control circuit 2 with operating power with predetermined timing thereby putting the control circuit 2 in an operating state. The power circuit 4 includes a first switching circuit 5, which supplies the operation power in the operating state of the control circuit 2, and a secondary battery 6 for quiescent power, which supplies quiescent power in the quiescent state of the control circuit 2. In the operating state of the control circuit 2, it switches on the first switching circuit 5 thereby supplying the operation power from the low-voltage battery 3 to the control circuit 2, and in the quiescent state of the control circuit 2, it switches off the first switching circuit 5 thereby supplying the quiescent power from the secondary battery 6 for quiescent power to the control circuit 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ハイブリッドカーや電気自動車等の電動車両に搭載される車両用の電源装置に関し、とくに、高電圧バッテリを監視する制御回路による低電圧バッテリの電力消費を削減する車両用の電源装置に関する。   The present invention relates to a power supply device for a vehicle mounted on an electric vehicle such as a hybrid car or an electric vehicle, and more particularly, to a power supply device for a vehicle that reduces power consumption of a low voltage battery by a control circuit that monitors the high voltage battery. .

車両用の電源装置は、車両のイグニッションスイッチをオフにする状態、すなわち車両を走行させない状態においても、高電圧バッテリの状態を所定の周期で監視している。高電圧バッテリが過放電されると、高電圧バッテリで車両を走行できなくなるからである。高電圧バッテリの状態は制御回路で監視される。この制御回路は、イグニッションスイッチをオフにする状態においても、たとえば数時間の周期で、高電圧バッテリの電圧や温度を検出して電池の状態を監視している。この制御回路は、車両に搭載される低電圧バッテリから電力を供給している。（特許文献１参照）
特開２００４−３２９０３号公報 The power supply device for a vehicle monitors the state of the high voltage battery at a predetermined cycle even in a state where the ignition switch of the vehicle is turned off, that is, a state where the vehicle is not driven. This is because if the high voltage battery is over-discharged, the vehicle cannot be driven with the high voltage battery. The state of the high voltage battery is monitored by a control circuit. Even in a state where the ignition switch is turned off, the control circuit monitors the state of the battery by detecting the voltage and temperature of the high-voltage battery, for example, at a cycle of several hours. This control circuit supplies power from a low-voltage battery mounted on the vehicle. (See Patent Document 1)
JP 2004-32903 A

高電圧バッテリを監視する制御回路は、所定の周期で動作状態となり、動作状態において、低電圧バッテリから制御回路に動作電力が供給される。制御回路は、ほとんどの時間帯において休止状態にあり、所定の周期で動作状態となる。すなわち、制御回路は、所定の周期で休止状態と動作状態とを繰り返しながら、高電圧バッテリを監視する。休止状態における制御回路の消費電流は動作状態よりも小さいが、長時間連続して車両を走行させない状態が続くと、休止電力が積算されて相当な電力消費となる。制御回路の電力消費で低電圧バッテリが過放電されると車両を走行できない等の種々の弊害が発生することから、制御回路の休止電力を小さくすることが要求されるが、すでに休止電力は相当に小さく、さらに省電力化するのは極めて難しい。このため、長時間車両を使用しない状態に放置すると、低電圧バッテリが過放電となって走行できなくなる弊害が発生する。   The control circuit that monitors the high-voltage battery enters an operating state at a predetermined cycle, and in the operating state, operating power is supplied from the low-voltage battery to the control circuit. The control circuit is in a dormant state in most time periods and is in an operating state at a predetermined cycle. In other words, the control circuit monitors the high voltage battery while repeating the resting state and the operating state at a predetermined cycle. The current consumption of the control circuit in the resting state is smaller than that in the operating state. However, if the vehicle does not run continuously for a long time, the resting power is integrated and a considerable amount of power is consumed. If the low-voltage battery is overdischarged due to the power consumption of the control circuit, various adverse effects such as the inability to drive the vehicle occur. Therefore, it is required to reduce the rest power of the control circuit. It is extremely difficult to reduce power consumption. For this reason, if the vehicle is left unused for a long period of time, the low voltage battery will be over-discharged and will not be able to run.

本発明は、この欠点を解決することを目的に開発されたものである。本発明の重要な目的は、制御回路の休止状態における低電圧バッテリの電力消費を削減して、制御回路による低電圧バッテリの過放電を有効に防止できる車両用の電源装置を提供することにある。   The present invention has been developed for the purpose of solving this drawback. An important object of the present invention is to provide a power supply device for a vehicle that can reduce power consumption of a low-voltage battery in a resting state of a control circuit and can effectively prevent overdischarge of the low-voltage battery by the control circuit. .

本発明の車両用の電源装置は、前述の目的を達成するために以下の構成を備える。
車両用の電源装置は、車両を走行させる高電圧バッテリ１と、この高電圧バッテリ１の制御回路２と、この制御回路２に動作電力を供給する低電圧バッテリ３と、この低電圧バッテリ３から制御回路２への電力供給を制御する電源回路４とを備え、電源回路４が所定のタイミングで制御回路２に動作電力を供給して、制御回路２を動作状態としている。電源回路４は、制御回路２の動作状態における動作電力を供給する第１のスイッチング回路５と、制御回路２の休止状態における休止電力を供給する休止電力用二次電池６とを備えている。電源回路４は、制御回路２の動作状態においては、第１のスイッチング回路５をオンとして低電圧バッテリ３から動作電力を制御回路２に供給し、制御回路２の休止状態においては、第１のスイッチング回路５をオフとして休止電力用二次電池６から休止電力を制御回路２に供給している。 The vehicle power supply device of the present invention has the following configuration in order to achieve the above-described object.
The power supply device for a vehicle includes a high voltage battery 1 for driving the vehicle, a control circuit 2 for the high voltage battery 1, a low voltage battery 3 for supplying operating power to the control circuit 2, and the low voltage battery 3. And a power supply circuit 4 that controls power supply to the control circuit 2. The power supply circuit 4 supplies operating power to the control circuit 2 at a predetermined timing, and the control circuit 2 is in an operating state. The power supply circuit 4 includes a first switching circuit 5 that supplies operating power in the operating state of the control circuit 2, and a resting power secondary battery 6 that supplies resting power in the resting state of the control circuit 2. In the operating state of the control circuit 2, the power supply circuit 4 turns on the first switching circuit 5 to supply operating power from the low-voltage battery 3 to the control circuit 2. The switching circuit 5 is turned off and the resting power is supplied from the resting power secondary battery 6 to the control circuit 2.

本発明の請求項２の車両用の電源装置は、電源回路４が、低電圧バッテリ３で休止電力用二次電池６を充電する充電回路７を備えている。   In the vehicle power supply device according to claim 2 of the present invention, the power supply circuit 4 includes a charging circuit 7 that charges the secondary battery 6 for rest power with the low voltage battery 3.

本発明の請求項３の車両用の電源装置は、休止電力用二次電池６の電圧又は残容量を検出し、休止電力用二次電池６の電圧が設定電圧よりも低く、あるいは残容量が設定残容量よりも小さいと、低電圧バッテリ３で休止電力用二次電池６を充電する。   The power supply device for a vehicle according to claim 3 of the present invention detects the voltage or remaining capacity of the secondary battery 6 for resting power, and the voltage of the resting power secondary battery 6 is lower than the set voltage or has a remaining capacity. If the capacity is smaller than the set remaining capacity, the secondary battery 6 for resting power is charged by the low voltage battery 3.

本発明の請求項４の車両用の電源装置は、休止電力用二次電池６の放電容量を検出して、検出された放電容量から充電容量を特定して充電する。   The vehicle power supply apparatus according to claim 4 of the present invention detects the discharge capacity of the secondary battery 6 for resting power, specifies the charge capacity from the detected discharge capacity, and charges the battery.

本発明の請求項５の車両用の電源装置は、低電圧バッテリ３の電圧が検出されない状態において、休止電力用二次電池６から制御回路２への電力供給を遮断する第２のスイッチング回路８を備え、低電圧バッテリ３の電圧が検出されない状態において、第２のスイッチング回路８をオフとして、休止電力用二次電池６から制御回路２への電力供給を遮断する。   The power supply device for a vehicle according to claim 5 of the present invention includes a second switching circuit 8 that cuts off the power supply from the resting power secondary battery 6 to the control circuit 2 in a state where the voltage of the low voltage battery 3 is not detected. In the state where the voltage of the low voltage battery 3 is not detected, the second switching circuit 8 is turned off to cut off the power supply from the resting power secondary battery 6 to the control circuit 2.

本発明の請求項６の車両用の電源装置は、休止電力用二次電池６の容量を、制御回路２に３０日間以上にわたって休止電力を供給できる容量としている。   In the power supply device for a vehicle according to claim 6 of the present invention, the capacity of the secondary battery 6 for resting power is set to a capacity capable of supplying resting power to the control circuit 2 for 30 days or more.

本発明の車両用の電源装置は、制御回路の休止状態における低電圧バッテリの電力消費を削減して、制御回路による低電圧バッテリの過放電を有効に防止できる特徴がある。それは、本発明の電源装置が、制御回路に休止電力を供給する休止電力用二次電池を内蔵すると共に、この休止電力用二次電池から制御回路に休止電力を供給するからである。とくに、本発明の電源装置は、この休止電力用二次電池から制御回路に動作電力は供給しない。制御回路の動作電力は、低電圧バッテリから供給される。したがって、休止電力用二次電池は、制御回路に大きな動作電力を供給する必要がなく、長期間にわたって制御回路に休止電力を供給できる。この休止電力用二次電池が、たとえば、制御回路に３０日間にわたって休止電力を供給できる容量に設定されると、３０日間イグニッションスイッチをオフに保持して車両を走行させない状態としても、低電圧バッテリから制御回路に休止電力は全く供給されない。車両が走行される状態になると、低電圧バッテリが充電されるので、この低電圧バッテリで休止電力用二次電池も充電することができる。このため、車両を使用しない日数が３０日以内であると、制御回路は休止電力を低電圧バッテリから全く消費しないで、高電圧バッテリを監視できる。さらに、制御回路の動作電力は低電圧バッテリから供給されるので、動作状態にある制御回路は、低電圧バッテリから供給される十分な電力、すなわち供給電力容量の極めて大きい低電圧バッテリから安定して電力が供給されて安定に動作して、高電圧バッテリを確実に監視する。   The power supply device for a vehicle according to the present invention is characterized in that the power consumption of the low voltage battery in the resting state of the control circuit can be reduced and the over discharge of the low voltage battery by the control circuit can be effectively prevented. This is because the power supply apparatus of the present invention incorporates a secondary battery for resting power that supplies rest power to the control circuit, and supplies rest power to the control circuit from the rest battery for rest power. In particular, the power supply apparatus of the present invention does not supply operating power to the control circuit from the secondary battery for resting power. The operating power of the control circuit is supplied from a low voltage battery. Therefore, the secondary battery for resting power does not need to supply large operating power to the control circuit, and can supply resting power to the control circuit for a long period of time. For example, when the secondary battery for resting power is set to a capacity capable of supplying resting power to the control circuit for 30 days, the low-voltage battery can be used even if the vehicle is not driven by keeping the ignition switch off for 30 days. No rest power is supplied to the control circuit. When the vehicle is in a running state, the low voltage battery is charged, so the secondary battery for resting power can be charged with this low voltage battery. For this reason, if the number of days in which the vehicle is not used is within 30 days, the control circuit can monitor the high voltage battery without consuming any rest power from the low voltage battery. Furthermore, since the operating power of the control circuit is supplied from the low voltage battery, the control circuit in the operating state can be stably supplied from sufficient power supplied from the low voltage battery, that is, from the low voltage battery having a very large supply power capacity. Power is supplied and operates stably to reliably monitor the high voltage battery.

本発明の請求項２の車両用の電源装置は、電源回路が、低電圧バッテリで休止電力用二次電池を充電する充電回路を備えているので、電圧差が少なく簡単な充電回路で能率よく休止電力用二次電池を充電できる。   In the power supply device for a vehicle according to claim 2 of the present invention, the power supply circuit includes a charging circuit for charging the secondary battery for resting power with a low-voltage battery. The secondary battery for resting power can be charged.

本発明の請求項３の車両用の電源装置は、休止電力用二次電池の電圧又は残容量を検出し、休止電力用二次電池の電圧が設定電圧よりも低く、あるいは残容量が設定残容量よりも小さいと、低電圧バッテリで休止電力用二次電池を充電するので、休止電力用二次電池の残容量が小さくなると低電圧バッテリから自動的に充電して、長期間にわたって休止電力用二次電池から制御回路に休止電力を供給できる。   The power supply device for a vehicle according to claim 3 of the present invention detects the voltage or remaining capacity of the secondary battery for resting power, and the voltage of the resting power secondary battery is lower than the set voltage or the remaining capacity is set remaining. If the capacity is smaller than the capacity, the secondary battery for resting power is charged by the low-voltage battery. Therefore, when the remaining capacity of the secondary battery for resting power is reduced, the battery is automatically charged from the low-voltage battery for long-term resting power. Pausing power can be supplied from the secondary battery to the control circuit.

本発明の請求項４の車両用の電源装置は、休止電力用二次電池の放電容量を検出して、検出された放電容量から充電容量を特定して充電するので、休止電力用二次電池を最適な容量で充電して、休止電力用二次電池の過充電や過放電を防止しながら、休止電力用二次電池の寿命を長くできる。   According to the fourth aspect of the present invention, the vehicle power supply device detects the discharge capacity of the secondary battery for pause power, specifies the charge capacity from the detected discharge capacity, and charges the secondary battery for pause power. Can be charged with an optimal capacity, and the life of the secondary battery for resting power can be extended while preventing overcharging and overdischarging of the secondary battery for resting power.

本発明の請求項５の車両用の電源装置は、低電圧バッテリの電圧が検出されない状態において、第２のスイッチング回路をオフとして、休止電力用二次電池から制御回路への電力供給を遮断するので、製造工程や整備過程において、低電圧バッテリを接続しない状態での休止電力用二次電池の無駄な放電を防止できる。   According to a fifth aspect of the present invention, in the vehicle power supply device, the second switching circuit is turned off in a state where the voltage of the low voltage battery is not detected, and the power supply from the standby power secondary battery to the control circuit is shut off. Therefore, it is possible to prevent wasteful discharge of the secondary battery for resting power when the low voltage battery is not connected in the manufacturing process or the maintenance process.

本発明の請求項６の車両用の電源装置は、休止電力用二次電池の容量を、制御回路に３０日間以上にわたって休止電力を供給できる容量としているので、３０日間にわたって車両を使用しないでも、制御回路の休止電力を休止電力用二次電池から供給して、低電圧バッテリの無駄な電力消費を防止できる。   In the power supply device for a vehicle according to claim 6 of the present invention, since the capacity of the secondary battery for resting power is set to a capacity capable of supplying resting power to the control circuit for 30 days or more, even if the vehicle is not used for 30 days, The idle power of the control circuit can be supplied from the secondary battery for the idle power, so that wasteful power consumption of the low voltage battery can be prevented.

以下、本発明の実施例を図面に基づいて説明する。ただし、以下に示す実施例は、本発明の技術思想を具体化するための車両用の電源装置を例示するものであって、本発明は車両用の電源装置を以下のものに特定しない。   Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below exemplifies a vehicle power supply device for embodying the technical idea of the present invention, and the present invention does not specify the vehicle power supply device as follows.

さらに、この明細書は、特許請求の範囲を理解しやすいように、実施例に示される部材に対応する番号を、「特許請求の範囲」および「課題を解決するための手段の欄」に示される部材に付記している。ただ、特許請求の範囲に示される部材を、実施例の部材に特定するものでは決してない。   Further, in this specification, for easy understanding of the scope of claims, numbers corresponding to the members shown in the embodiments are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

図１に示す車両用の電源装置は、高電圧バッテリ１と、この高電圧バッテリ１の制御回路２と、この制御回路２に動作電力を供給する低電圧バッテリ３と、この低電圧バッテリ３から制御回路２への電力供給を制御する電源回路４とを備える。   The vehicle power supply device shown in FIG. 1 includes a high-voltage battery 1, a control circuit 2 for the high-voltage battery 1, a low-voltage battery 3 that supplies operating power to the control circuit 2, and the low-voltage battery 3. And a power supply circuit 4 that controls power supply to the control circuit 2.

高電圧バッテリ１は、車両を走行させるモータに電力を供給するバッテリであって、ハイブリッドカーにあっては、車両を走行させる状態で充電される。   The high-voltage battery 1 is a battery that supplies electric power to a motor that drives the vehicle. In a hybrid car, the high-voltage battery 1 is charged while the vehicle is running.

低電圧バッテリ３は、１２Ｖ又は２４Ｖの鉛バッテリからなる電装用バッテリである。ただし、本発明は、低電圧バッテリを電装用バッテリには特定せず、専用のバッテリを搭載することもできる。低電圧バッテリ３は、車両を走行させる状態において、エンジンで駆動されるオルタネータ、又は高電圧バッテリからＤＣ／ＤＣコンバータを介して降圧された電力で充電される。低電圧バッテリ３は、車両の走行状態において、電圧や残容量が検出されて、過充電や過放電されることなく所定の電圧や所定の残容量となるように充電される。   The low voltage battery 3 is a battery for electrical equipment composed of a 12V or 24V lead battery. However, the present invention does not specify a low-voltage battery as an electrical battery, and a dedicated battery can be mounted. The low voltage battery 3 is charged with electric power stepped down from the alternator driven by the engine or the high voltage battery via the DC / DC converter in a state where the vehicle is running. The low-voltage battery 3 is charged such that a voltage or a remaining capacity is detected without being overcharged or overdischarged when the voltage or the remaining capacity is detected while the vehicle is running.

電源回路４は、車両のイグニッションスイッチがオフに切り換えられる停止状態においては、所定のタイミングで、たとえば数時間毎に、制御回路２に動作電力を供給して、制御回路２を動作状態とする。イグニッションスイッチは、車両を走行させる運転時にオンに切り換えられて、車両を走行させない状態ではオフに切り換えられる車両のメインスイッチである。動作状態に切り換えられた制御回路２は、高電圧バッテリ１の電圧等を検出して高電圧バッテリ１の状態を監視する。制御回路２は、動作状態に切り換えられて高電圧バッテリ１の状態を検出した後、休止状態に切り換えられる。制御回路２は、動作状態と休止状態を切り換えるタイマ（図示せず）を内蔵している。制御回路２のタイマは、休止状態においてもカウントしており、休止状態となって、所定の時間経過すると、たとえば３時間経過すると、休止状態を動作状態に切り換えて高電圧バッテリ１の状態を検出する。その後、動作状態から休止状態に切り換えられる。制御回路２は、休止状態においてもタイマなどで電力を消費する。休止状態における電力消費は、動作状態における電力消費よりも小さいが０にはできない。   In a stop state in which the ignition switch of the vehicle is switched off, the power supply circuit 4 supplies the operating power to the control circuit 2 at a predetermined timing, for example, every several hours, thereby setting the control circuit 2 in the operating state. The ignition switch is a main switch of the vehicle that is turned on when the vehicle is running and is turned off when the vehicle is not running. The control circuit 2 switched to the operating state detects the voltage of the high voltage battery 1 and monitors the state of the high voltage battery 1. After the control circuit 2 is switched to the operating state and detects the state of the high voltage battery 1, it is switched to the resting state. The control circuit 2 has a built-in timer (not shown) that switches between an operating state and a dormant state. The timer of the control circuit 2 counts even in the hibernation state. When the predetermined time elapses, for example, when 3 hours elapses, the hibernation state is switched to the operation state and the state of the high voltage battery 1 is detected. To do. Thereafter, the operating state is switched to the resting state. The control circuit 2 consumes power by a timer or the like even in a sleep state. The power consumption in the dormant state is smaller than the power consumption in the operating state, but cannot be zero.

イグニッションスイッチがオフに切り換えられる状態、すなわち車両を走行させない状態で、低電圧バッテリ３は充電されない。したがって、長時間車両を走行させない状態にあると、制御回路２は動作状態と休止状態を繰り返して電力を消費する。このため、イグニッションスイッチのオフ状態、とくに長時間のオフ状態において、制御回路２による低電圧バッテリ３の電力消費を少なくして過放電を防止することが大切である。   The low voltage battery 3 is not charged in a state where the ignition switch is switched off, that is, in a state where the vehicle is not driven. Therefore, when the vehicle is not driven for a long time, the control circuit 2 consumes power by repeating the operation state and the rest state. For this reason, it is important to prevent overdischarge by reducing the power consumption of the low voltage battery 3 by the control circuit 2 when the ignition switch is in the off state, particularly in the off state for a long time.

このことを実現するために、電源回路４は、低電圧バッテリ３から制御回路２に動作電力のみを供給して、休止電力を供給しないようにして、長時間の休止電力が、低電圧バッテリ３の過放電の原因となるのを阻止する。この電源回路４は、制御回路２の動作状態における動作電力を供給する第１のスイッチング回路５と、制御回路２の休止状態における休止電力を供給する休止電力用二次電池６とを備えている。   In order to realize this, the power supply circuit 4 supplies only the operating power from the low-voltage battery 3 to the control circuit 2 and does not supply the resting power. To prevent the cause of overdischarge. The power supply circuit 4 includes a first switching circuit 5 that supplies operating power in the operating state of the control circuit 2, and a resting power secondary battery 6 that supplies resting power in the resting state of the control circuit 2. .

この電源回路４は、図２に示すように、制御回路２の動作状態においては、第１のスイッチング回路５をオンとして低電圧バッテリ３から動作電力を制御回路２に供給するが、制御回路２の休止状態においては、第１のスイッチング回路５をオフとして休止電力用二次電池６から休止電力を制御回路２に供給する。図２のグラフは、低電圧バッテリ３からの消費電流と、休止電力用二次電池６の電池電圧の変化を示している。この図に示すように、電源回路４は、制御回路２の休止状態においては、低電圧バッテリ３から制御回路２に休止電力を供給することなく、休止電力用二次電池６から供給する。したがって、制御回路２の休止状態における低電圧バッテリ３の電力消費を削減して、制御回路２による低電圧バッテリ３の過放電を有効に防止できる。   As shown in FIG. 2, the power supply circuit 4 supplies the operating power from the low-voltage battery 3 to the control circuit 2 by turning on the first switching circuit 5 in the operating state of the control circuit 2. In the rest state, the first switching circuit 5 is turned off, and rest power is supplied from the rest power secondary battery 6 to the control circuit 2. The graph of FIG. 2 shows the current consumption from the low voltage battery 3 and the change in the battery voltage of the secondary battery 6 for resting power. As shown in this figure, when the control circuit 2 is in the resting state, the power supply circuit 4 supplies the resting power from the secondary battery 6 without supplying resting power to the control circuit 2 from the low voltage battery 3. Therefore, the power consumption of the low voltage battery 3 in the rest state of the control circuit 2 can be reduced, and overdischarge of the low voltage battery 3 by the control circuit 2 can be effectively prevented.

図１において、第１のスイッチング回路５は、低電圧バッテリ３のプラス側と制御回路２の電源端子２ａとの間に接続している第１のスイッチング素子１１と、この第１のスイッチング素子１１をオンオフに制御する第１の入力スイッチング素子１２と、第１のスイッチング素子１１と直列に接続されて低電圧バッテリ３の出力電圧を安定化する三端子の定電圧ＩＣ１３と、定電圧ＩＣ１３の出力側に接続しているダイオード１４とを備える。を備える。第１のスイッチング素子１１はトランジスタで、ベースを第１の入力スイッチング素子１２であるトランジスタのコレクタに接続して、エミッタを低電圧バッテリ３のプラス側に、コレクタを定電圧ＩＣ１３とダイオード１４を介して制御回路２の電源端子２ａに接続している。第１の入力スイッチング素子１２はトランジスタで、エミッタをアースに、ベースを制御回路２の制御信号端子２ｂに接続している。第１の入力スイッチング素子１２のトランジスタは、制御回路２の制御信号端子２ｂからオン信号である”Ｈｉｇｈ”が出力されると、オンに切り換えられる。第１の入力スイッチング素子１２のトランジスタがオンに切り換えられると、第１のスイッチング素子１１のトランジスタがオンに切り換えらて、低電圧バッテリ３から制御回路２に動作電力が供給される。低電圧バッテリ３から供給される電力は、三端子の定電圧ＩＣ１３で安定化されて、制御回路２に入力される。定電圧ＩＣ１３は、低電圧バッテリ３の電圧が変動しても一定の電圧に安定化して制御回路２に電力を供給する。定電圧ＩＣ１３の出力側に接続しているダイオード１４は、低電圧バッテリ３から制御回路２に向かって通電するが、休止電力用二次電池６から低電圧バッテリ３への電流を遮断する。制御信号端子２ｂからオフ信号、すなわち”Ｌｏｗ”が出力されると、第１の入力スイッチング素子１２のトランジスタがオフとなって、第１のスイッチング素子１１のトランジスタがオフに切り換えられて、低電圧バッテリ３から制御回路２への電力供給は遮断される。第１のスイッチング回路５は、制御回路２の制御信号端子２ｂから”Ｈｉｇｈ”又は”Ｌｏｗ”を出力して、第１のスイッチング素子１１をオンオフに切り換えて、低電圧バッテリ３から制御回路２への電力供給を制御する。   In FIG. 1, the first switching circuit 5 includes a first switching element 11 connected between the plus side of the low-voltage battery 3 and the power supply terminal 2 a of the control circuit 2, and the first switching element 11. The first input switching element 12 that controls the on / off of the battery, the three-terminal constant voltage IC 13 that is connected in series with the first switching element 11 and stabilizes the output voltage of the low-voltage battery 3, and the output of the constant voltage IC 13 And a diode 14 connected to the side. Is provided. The first switching element 11 is a transistor, the base is connected to the collector of the transistor which is the first input switching element 12, the emitter is connected to the plus side of the low-voltage battery 3, and the collector is connected via the constant voltage IC 13 and the diode 14. Are connected to the power supply terminal 2a of the control circuit 2. The first input switching element 12 is a transistor having an emitter connected to ground and a base connected to the control signal terminal 2 b of the control circuit 2. The transistor of the first input switching element 12 is switched on when “High” which is an on signal is output from the control signal terminal 2 b of the control circuit 2. When the transistor of the first input switching element 12 is switched on, the transistor of the first switching element 11 is switched on, and operating power is supplied from the low voltage battery 3 to the control circuit 2. The power supplied from the low-voltage battery 3 is stabilized by a three-terminal constant voltage IC 13 and input to the control circuit 2. The constant voltage IC 13 stabilizes to a constant voltage and supplies power to the control circuit 2 even when the voltage of the low voltage battery 3 fluctuates. The diode 14 connected to the output side of the constant voltage IC 13 is energized from the low voltage battery 3 toward the control circuit 2, but interrupts the current from the secondary battery 6 for rest power to the low voltage battery 3. When an off signal, that is, “Low” is output from the control signal terminal 2b, the transistor of the first input switching element 12 is turned off, and the transistor of the first switching element 11 is turned off, so that the low voltage The power supply from the battery 3 to the control circuit 2 is cut off. The first switching circuit 5 outputs “High” or “Low” from the control signal terminal 2 b of the control circuit 2 to switch the first switching element 11 on and off, and from the low voltage battery 3 to the control circuit 2. To control the power supply.

さらに、図１の電源回路４は、低電圧バッテリ３で休止電力用二次電池６を充電する充電回路７を備える。充電回路７は、低電圧バッテリ３のプラス側に接続している充電スイッチング素子１６と、この充電スイッチング素子１６をオンオフに制御する充電入力スイッチング素子１７と、低電圧バッテリ３の出力電圧を安定化して休止電力用二次電池６に供給する三端子の定電圧ＩＣ１８と、この定電圧ＩＣ１８の出力側に接続しているダイオード１８とを備える。   Further, the power supply circuit 4 of FIG. 1 includes a charging circuit 7 that charges the secondary battery 6 for rest power with the low-voltage battery 3. The charging circuit 7 stabilizes the output voltage of the low voltage battery 3, the charge switching element 16 connected to the positive side of the low voltage battery 3, the charge input switching element 17 that controls the charge switching element 16 to be turned on and off. A three-terminal constant voltage IC 18 to be supplied to the secondary battery 6 for resting power, and a diode 18 connected to the output side of the constant voltage IC 18.

充電スイッチング素子１６はトランジスタで、エミッタを低電圧バッテリ３のプラス側に、コレクタを定電圧ＩＣ１８を介して休止電力用二次電池側に、ベースを充電入力スイッチング素子１７のコレクタに接続している。充電入力スイッチング素子１７はトランジスタで、エミッタをアースに、ベースを制御回路２の充電信号端子２ｃに接続している。この充電回路７は、制御回路２の充電信号端子２ｃから充電信号である”Ｈｉｇｈ”が出力されると、充電入力スイッチング素子１７のトランジスタがオンとなって、充電スイッチング素子１６のトランジスタをオンに切り換える。この状態で低電圧バッテリ３から休止電力用二次電池６に電力が供給されて、休止電力用二次電池６が充電される。充電信号端子２ｃから充電停止信号の”Ｌｏｗ”が出力されると、充電入力スイッチング素子１７のトランジスタがオフとなって、充電スイッチング素子１６のトランジスタをオフに切り換える。この状態で低電圧バッテリ３から休止電力用二次電池６への電力供給が遮断されて、休止電力用二次電池６は充電されない。三端子の定電圧ＩＣ１８は、低電圧バッテリ３の出力電圧を一定の電圧に安定化して休止電力用二次電池６に供給する。したがって、低電圧バッテリ３の電圧が変動しても、一定の電圧と電流で休止電力用二次電池６が充電される。定電圧ＩＣ１８の出力側に接続しているダイオード１９は、低電圧バッテリ３から休止電力用二次電池６に向かって通電するが、休止電力用二次電池６から低電圧バッテリ３への電流を遮断する。すなわち、低電圧バッテリ３から休止電力用二次電池６を充電するが、休止電力用二次電池６から低電圧バッテリ３には充電電流を流さない。この回路構成は、低電圧バッテリ３の電圧が休止電力用二次電池６の電圧よりも低くなっても、休止電力用二次電池６が放電して低電圧バッテリ３を充電することはない。   The charge switching element 16 is a transistor, the emitter is connected to the plus side of the low voltage battery 3, the collector is connected to the secondary battery side for resting power via the constant voltage IC 18, and the base is connected to the collector of the charge input switching element 17. . The charge input switching element 17 is a transistor having an emitter connected to ground and a base connected to the charge signal terminal 2 c of the control circuit 2. When the charging signal “High” is output from the charging signal terminal 2 c of the control circuit 2, the charging circuit 7 turns on the transistor of the charging input switching element 17 and turns on the transistor of the charging switching element 16. Switch. In this state, electric power is supplied from the low voltage battery 3 to the secondary battery 6 for resting power, and the secondary battery 6 for resting power is charged. When the charge stop signal “Low” is output from the charge signal terminal 2 c, the transistor of the charge input switching element 17 is turned off, and the transistor of the charge switching element 16 is switched off. In this state, the power supply from the low voltage battery 3 to the standby power secondary battery 6 is cut off, and the standby power secondary battery 6 is not charged. The three-terminal constant voltage IC 18 stabilizes the output voltage of the low voltage battery 3 to a constant voltage and supplies it to the resting power secondary battery 6. Therefore, even if the voltage of the low voltage battery 3 fluctuates, the secondary battery 6 for resting power is charged with a constant voltage and current. The diode 19 connected to the output side of the constant voltage IC 18 is energized from the low voltage battery 3 toward the rest power secondary battery 6, but the current from the rest power secondary battery 6 to the low voltage battery 3 is supplied. Cut off. That is, the secondary battery 6 for resting power is charged from the low voltage battery 3, but no charging current is passed from the secondary battery 6 for resting power to the low voltage battery 3. In this circuit configuration, even if the voltage of the low voltage battery 3 becomes lower than the voltage of the secondary battery 6 for resting power, the secondary battery 6 for resting power is not discharged and the low voltage battery 3 is not charged.

休止電力用二次電池６の充電状態は、制御回路２で制御される。制御回路２は、休止電力用二次電池６の電圧又は残容量を検出し、休止電力用二次電池６の電圧が設定電圧よりも低く、あるいは残容量が設定残容量よりも小さいと、充電信号端子２ｃから充電信号を出力して低電圧バッテリ３で休止電力用二次電池６を充電する。図１の制御回路２は、休止電力用二次電池６の電圧を検出する電圧検出端子２ｄを備えている。電圧検出端子２ｄは、第２のスイッチング回路８のトランジスタを介して休止電力用二次電池６のプラス側に接続している。この制御回路２は、図２に示すように、電圧検出端子２ｄから入力される休止電力用二次電池６の電圧を、あらかじめ記憶している最低電圧に比較して、休止電力用二次電池６の電圧が最低電圧よりも低くなると休止電力用二次電池６を充電する。図２は、休止電力用二次電池６の電池電圧の変化と、制御回路２が充電回路７をオンとして休止電力用二次電池６を充電するタイミングを示している。この図において、制御回路２は、制御回路２が動作状態となるタイミングで、すなわち、第１のスイッチング回路５がオンに切り換えられるタイミングで、充電信号端子２ｃから充電信号を所定の時間出力して休止電力用二次電池６を短時間充電している。この充電方法は、低電圧バッテリ３の電力消費を少なくしながら休止電力用二次電池６を充電できる。ただ、制御回路２は、電圧検出端子２ｄから入力される休止電力用二次電池６の電圧を、あらかじめ記憶している最低電圧に比較して、休止電力用二次電池６の電圧が最低電圧よりも低くなると、充電信号端子２ｃから充電信号を出力して休止電力用二次電池６の充電を開始し、電圧検出端子２ｄから入力される休止電力用二次電池６の電圧を、あらかじめ記憶している最高電圧に比較して、休止電力用二次電池６の電圧が最高電圧よりも高くなると、充電信号端子２ｃから充電を停止する信号を出力して休止電力用二次電池６の充電を停止することもできる。   The charging state of the secondary battery 6 for resting power is controlled by the control circuit 2. The control circuit 2 detects the voltage or remaining capacity of the secondary battery 6 for resting power, and if the voltage of the secondary battery 6 for resting power is lower than the set voltage or the remaining capacity is smaller than the set remaining capacity, A charging signal is output from the signal terminal 2 c and the secondary battery 6 for resting power is charged by the low voltage battery 3. The control circuit 2 in FIG. 1 includes a voltage detection terminal 2d that detects the voltage of the secondary battery 6 for resting power. The voltage detection terminal 2 d is connected to the plus side of the secondary battery 6 for resting power via the transistor of the second switching circuit 8. As shown in FIG. 2, the control circuit 2 compares the voltage of the resting power secondary battery 6 input from the voltage detection terminal 2d with the lowest voltage stored in advance, thereby When the voltage 6 becomes lower than the minimum voltage, the secondary battery 6 for resting power is charged. FIG. 2 shows changes in the battery voltage of the secondary battery 6 for resting power and the timing when the control circuit 2 turns on the charging circuit 7 and charges the secondary battery 6 for resting power. In this figure, the control circuit 2 outputs a charge signal from the charge signal terminal 2c for a predetermined time at a timing when the control circuit 2 enters an operating state, that is, at a timing when the first switching circuit 5 is switched on. The secondary battery 6 for resting power is charged for a short time. This charging method can charge the secondary battery 6 for resting power while reducing the power consumption of the low voltage battery 3. However, the control circuit 2 compares the voltage of the secondary battery 6 for resting power input from the voltage detection terminal 2d with the lowest voltage stored in advance, and the voltage of the secondary battery 6 for resting power is the lowest voltage. The charging signal is output from the charging signal terminal 2c, charging of the secondary battery 6 for resting power is started, and the voltage of the secondary battery 6 for resting power input from the voltage detection terminal 2d is stored in advance. When the voltage of the secondary battery 6 for resting power becomes higher than the maximum voltage compared to the maximum voltage, the signal for stopping charging is output from the charging signal terminal 2c to charge the secondary battery 6 for resting power. Can also be stopped.

この制御回路２は、休止電力用二次電池６の電圧を検出して、充電を制御するが、制御回路２は、休止電力用二次電池６の放電容量を検出し、検出した放電容量から充電容量を特定して休止電力用二次電池６の充電を制御することもできる。この制御回路２は、休止電力用二次電池６が所定の容量放電されることを検出すると、放電容量に相当する充電容量で休止電力用二次電池６を充電する。放電容量は充電容量よりも大きく、充放電を繰り返しても休止電力用二次電池６を過充電することなく、また過放電しない容量に設定される。制御回路２は、休止電力を供給する時間から放電容量を検出し、あるいは放電電流の積算値から放電容量を検出する。また、充電時間から充電容量を検出し、あるいは充電電流の積算値から充電容量を検出して、休止電力用二次電池６の充放電を制御する。   The control circuit 2 detects the voltage of the secondary battery 6 for resting power and controls charging. The control circuit 2 detects the discharge capacity of the secondary battery 6 for resting power, and from the detected discharge capacity. It is also possible to control the charging of the secondary battery 6 for rest power by specifying the charging capacity. When the control circuit 2 detects that the secondary battery 6 for resting power is discharged with a predetermined capacity, the control circuit 2 charges the secondary battery 6 for resting power with a charging capacity corresponding to the discharge capacity. The discharge capacity is larger than the charge capacity, and is set to a capacity that does not overcharge the secondary battery 6 for resting power and does not overdischarge even if charging and discharging are repeated. The control circuit 2 detects the discharge capacity from the time when the resting power is supplied, or detects the discharge capacity from the integrated value of the discharge current. Further, the charging capacity is detected from the charging time or the charging capacity is detected from the integrated value of the charging current to control charging / discharging of the secondary battery 6 for resting power.

さらに、図１の電源装置は、低電圧バッテリ３の電圧が検出されない状態において、休止電力用二次電池６から制御回路２への電力供給を遮断する第２のスイッチング回路８を備える。第２のスイッチング回路８は、第２のスイッチング素子２１とこの第２のスイッチング素子２１をオンオフに制御する第２の入力スイッチング素子２２とを備える。第２のスイッチング素子２１はトランジスタで、エミッタを休止電力用二次電池６のプラス側に、コレクタをダイオード２４を介して制御回路２の電源端子２ａに、ベースを第２の入力スイッチング素子２２に接続している。第２の入力スイッチング素子２２はトランジスタで、コレクタを第２のスイッチング素子２１のトランジスタのベースに、エミッタをアースに、ベースを入力抵抗２３を介して低電圧バッテリ３のプラス側に接続している。この第２のスイッチング回路８は、低電圧バッテリ３が接続されると、第２の入力スイッチング素子２２のトランジスタがオン、このトランジスタが第２のスイッチング素子２１のトランジスタをオンにして、休止電力用二次電池６から制御回路２の電源端子２ａに電力が供給される。低電圧バッテリ３が外されて低電圧バッテリ３の電圧が検出されない状態になると、第２の入力スイッチング素子２２のトランジスタがオフとなり、これが第２のスイッチング素子２１のトランジスタをオフに切り換えて、休止電力用二次電池６から制御回路２への電力供給が遮断される。したがって、製造工程や整備過程において、低電圧バッテリ３が外された状態では、休止電力用二次電池６から制御回路２に電力が供給されず、休止電力用二次電池６の無駄な放電を停止できる。   Furthermore, the power supply device of FIG. 1 includes a second switching circuit 8 that cuts off the power supply from the resting power secondary battery 6 to the control circuit 2 in a state where the voltage of the low voltage battery 3 is not detected. The second switching circuit 8 includes a second switching element 21 and a second input switching element 22 that controls the second switching element 21 to be turned on and off. The second switching element 21 is a transistor. The emitter is connected to the positive side of the secondary battery 6 for resting power, the collector is connected to the power supply terminal 2a of the control circuit 2 via the diode 24, and the base is connected to the second input switching element 22. Connected. The second input switching element 22 is a transistor, the collector is connected to the base of the transistor of the second switching element 21, the emitter is connected to the ground, and the base is connected to the plus side of the low-voltage battery 3 via the input resistor 23. . In the second switching circuit 8, when the low voltage battery 3 is connected, the transistor of the second input switching element 22 is turned on, and this transistor turns on the transistor of the second switching element 21, thereby Power is supplied from the secondary battery 6 to the power supply terminal 2 a of the control circuit 2. When the low-voltage battery 3 is removed and the voltage of the low-voltage battery 3 is not detected, the transistor of the second input switching element 22 is turned off, which switches the transistor of the second switching element 21 off and pauses. The power supply from the power secondary battery 6 to the control circuit 2 is cut off. Therefore, when the low-voltage battery 3 is removed in the manufacturing process or the maintenance process, power is not supplied from the standby power secondary battery 6 to the control circuit 2, and wasteful discharge of the standby power secondary battery 6 is performed. You can stop.

休止電力用二次電池６は、リチウムイオン電池やニッケル水素電池で、この二次電池は、制御回路２に休止電力を供給できる出力電圧で、たとえば制御回路２に２００時間以上、好ましくは３００時間以上、さらに好ましくは５００時間以上にわたって休止電力を供給できる容量とされる。たとえば、休止電力用二次電池６の容量を１００ｍＡｈとして、制御回路２の休止状態における消費電力を１００μＡとすれば、この休止電力用二次電池６は、１ヶ月以上にわたって制御回路２に休止電力を供給できる。すなわち、１ヶ月以上の長い時間にイグニッションスイッチがオフに保持されて、車両が走行されないで放置されても、休止電力用二次電池６から制御回路２に休止電力を供給して、低電圧バッテリ３から制御回路２には電力が供給されない。   The secondary battery 6 for resting power is a lithium ion battery or a nickel metal hydride battery, and this secondary battery is an output voltage that can supply resting power to the control circuit 2, for example, 200 hours or more, preferably 300 hours to the control circuit 2. As mentioned above, it is set as the capacity | capacitance which can supply rest electric power over 500 hours or more more preferably. For example, if the capacity of the secondary battery 6 for resting power is 100 mAh and the power consumption in the resting state of the control circuit 2 is 100 μA, the secondary battery 6 for resting power is put into the resting power for one month or more. Can supply. That is, even if the ignition switch is held off for a long time of one month or longer and the vehicle is left without being driven, the resting power is supplied from the resting power secondary battery 6 to the control circuit 2 so that the low voltage battery No power is supplied from 3 to the control circuit 2.

本発明の一実施例にかかる車両用の電源装置の概略構成図である。It is a schematic block diagram of the power supply device for vehicles concerning one Example of the present invention. 電源回路の動作状態と休止電力用二次電池の電圧及び定電圧バッテリの消費電流を示す図である。It is a figure which shows the operating state of a power supply circuit, the voltage of the secondary battery for rest electric power, and the consumption current of a constant voltage battery.

符号の説明Explanation of symbols

１…高電圧バッテリ
２…制御回路 ２ａ…電源端子
２ｂ…制御信号端子
２ｃ…充電信号端子
２ｄ…電圧検出端子
３…低電圧バッテリ
４…電源回路
５…第１のスイッチング回路
６…休止電力用二次電池
７…充電回路
８…第２のスイッチング回路
１１…第１のスイッチング素子
１２…第１の入力スイッチング素子
１３…定電圧ＩＣ
１４…ダイオード
１６…充電スイッチング素子
１７…充電入力スイッチング素子
１８…定電圧ＩＣ
１９…ダイオード
２１…第２のスイッチング素子
２２…第２の入力スイッチング素子
２３…入力抵抗
２４…ダイオード DESCRIPTION OF SYMBOLS 1 ... High voltage battery 2 ... Control circuit 2a ... Power supply terminal
2b: Control signal terminal
2c: Charging signal terminal
2d ... voltage detection terminal 3 ... low voltage battery 4 ... power supply circuit 5 ... first switching circuit 6 ... secondary battery for resting power 7 ... charging circuit 8 ... second switching circuit 11 ... first switching element 12 ... first 1 input switching element 13... Constant voltage IC
DESCRIPTION OF SYMBOLS 14 ... Diode 16 ... Charge switching element 17 ... Charge input switching element 18 ... Constant voltage IC
DESCRIPTION OF SYMBOLS 19 ... Diode 21 ... 2nd switching element 22 ... 2nd input switching element 23 ... Input resistance 24 ... Diode

Claims (6)

車両を走行させる高電圧バッテリ(1)と、この高電圧バッテリ(1)の制御回路(2)と、この制御回路(2)に動作電力を供給する低電圧バッテリ(3)と、この低電圧バッテリ(3)から制御回路(2)への電力供給を制御する電源回路(4)とを備え、電源回路(4)が所定のタイミングで制御回路(2)に動作電力を供給して、制御回路(2)を動作状態とするようにしてなる車両用の電源装置において、
前記電源回路(4)が、制御回路(2)の動作状態における動作電力を供給する第１のスイッチング回路(5)と、制御回路(2)の休止状態における休止電力を供給する休止電力用二次電池(6)とを備えており、
前記電源回路(4)が、制御回路(2)の動作状態においては、第１のスイッチング回路(5)をオンとして低電圧バッテリ(3)から動作電力を制御回路(2)に供給し、制御回路(2)の休止状態においては、第１のスイッチング回路(5)をオフとして休止電力用二次電池(6)から休止電力を制御回路(2)に供給するようにしてなることを特徴とする車両用の電源装置。 A high voltage battery (1) for running the vehicle, a control circuit (2) for the high voltage battery (1), a low voltage battery (3) for supplying operating power to the control circuit (2), and the low voltage A power supply circuit (4) for controlling the power supply from the battery (3) to the control circuit (2), and the power supply circuit (4) supplies the operating power to the control circuit (2) at a predetermined timing for control. In the vehicle power supply device configured to bring the circuit (2) into an operating state,
The power supply circuit (4) has a first switching circuit (5) for supplying operating power in the operating state of the control circuit (2), and two power sources for stopping power for supplying inactive power in the inactive state of the control circuit (2). A secondary battery (6),
In the operating state of the control circuit (2), the power supply circuit (4) turns on the first switching circuit (5) to supply operating power from the low voltage battery (3) to the control circuit (2). In the rest state of the circuit (2), the first switching circuit (5) is turned off, and rest power is supplied from the rest power secondary battery (6) to the control circuit (2). A power supply device for a vehicle. 前記電源回路(4)が、低電圧バッテリ(3)で休止電力用二次電池(6)を充電する充電回路(7)を備える請求項１に記載される車両用の電源装置。   The power supply device for a vehicle according to claim 1, wherein the power supply circuit (4) includes a charging circuit (7) for charging the secondary battery (6) for resting power with a low voltage battery (3). 前記休止電力用二次電池(6)の電圧又は残容量が検出され、休止電力用二次電池(6)の電圧が設定電圧よりも低く、あるいは残容量が設定残容量よりも小さいと、低電圧バッテリ(3)で休止電力用二次電池(6)を充電する請求項２に記載される車両用の電源装置。   When the voltage or remaining capacity of the secondary battery for standby power (6) is detected and the voltage of the secondary battery for standby power (6) is lower than the set voltage or the remaining capacity is lower than the set remaining capacity, the The power supply device for vehicles according to claim 2, wherein the secondary battery (6) for resting power is charged by the voltage battery (3). 前記休止電力用二次電池(6)の放電容量が検出されて、検出された放電容量から充電容量を特定して充電する請求項２に記載される車両用の電源装置。   The power supply device for a vehicle according to claim 2, wherein a discharge capacity of the secondary battery (6) for resting power is detected, and a charge capacity is specified from the detected discharge capacity for charging. 前記低電圧バッテリ(3)の電圧が検出されない状態において、休止電力用二次電池(6)から制御回路(2)への電力供給を遮断する第２のスイッチング回路(8)を備え、低電圧バッテリ(3)の電圧が検出されない状態において、第２のスイッチング回路(8)をオフとして、休止電力用二次電池(6)から制御回路(2)への電力供給を遮断する請求項１に記載される車両用の電源装置。   A second switching circuit (8) that cuts off power supply from the secondary battery (6) for resting power to the control circuit (2) when the voltage of the low-voltage battery (3) is not detected; In the state where the voltage of the battery (3) is not detected, the second switching circuit (8) is turned off to cut off the power supply from the standby power secondary battery (6) to the control circuit (2). The vehicle power supply described. 前記休止電力用二次電池(6)の容量が、前記制御回路(2)に３０日間以上に休止電力を供給できる容量である請求項１に記載される車両用の電源装置。   The power supply device for a vehicle according to claim 1, wherein the capacity of the secondary battery for resting power (6) is a capacity capable of supplying resting power to the control circuit (2) for 30 days or more.
JP2008011690A 2008-01-22 2008-01-22 Power supply for vehicle Expired - Fee Related JP4937146B2 (en)

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JP2017041942A (en) * 2015-08-18 2017-02-23 Ntn株式会社 Electric automobile
CN110920392A (en) * 2019-11-19 2020-03-27 珠海格力电器股份有限公司 Power supply control circuit, power supply control method and new energy automobile

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JP2013034293A (en) * 2011-08-01 2013-02-14 Toshiba Corp Electric vehicle
JP2017041942A (en) * 2015-08-18 2017-02-23 Ntn株式会社 Electric automobile
CN110920392A (en) * 2019-11-19 2020-03-27 珠海格力电器股份有限公司 Power supply control circuit, power supply control method and new energy automobile

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