JP2017195652A - Vehicle mounted power supply device and vehicle mounted power supply system - Google Patents

Vehicle mounted power supply device and vehicle mounted power supply system Download PDF

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Publication number
JP2017195652A
JP2017195652A JP2016082723A JP2016082723A JP2017195652A JP 2017195652 A JP2017195652 A JP 2017195652A JP 2016082723 A JP2016082723 A JP 2016082723A JP 2016082723 A JP2016082723 A JP 2016082723A JP 2017195652 A JP2017195652 A JP 2017195652A
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Prior art keywords
storage device
power storage
power supply
generator
path
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速人 福嶋
Hayato Fukushima
速人 福嶋
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Priority to JP2016082723A priority Critical patent/JP2017195652A/en
Priority to PCT/JP2017/014019 priority patent/WO2017183437A1/en
Publication of JP2017195652A publication Critical patent/JP2017195652A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/04—Arrangement of batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle mounted power supply device capable of suppressing occurrence of a ground fault current.SOLUTION: A diode D1 is provided on a path R1 connecting a generator 1 and a power storage device 21. The forward direction of the diode D1 is the direction in which a charging current for the generator 1 to charge the power storage device 21 flows. A diode D2 is provided on a path R2 connecting the generator 1 and a power storage device 22. The forward direction of the diode D2 is a direction in which the charging current for the generator 1 to charge the power storage device 22 flows.SELECTED DRAWING: Figure 1

Description

この発明は、車載電源用装置および車載用電源システムに関する。   The present invention relates to an in-vehicle power supply device and an in-vehicle power supply system.

第１バッテリ、第２バッテリおよびオルタネータを搭載した車両が提案されている。この車両において、第１バッテリと第２バッテリとの間にスイッチが設けられる場合がある。またオルタネータは第１バッテリに直接に接続され、スイッチを介して第２バッテリに接続されることがある。このオルタネータはエンジンの回転に伴って発電し、第１バッテリを充電する。またスイッチがオンしているときには、オルタネータはスイッチを介して第２バッテリも充電できる。   A vehicle equipped with a first battery, a second battery, and an alternator has been proposed. In this vehicle, a switch may be provided between the first battery and the second battery. The alternator may be directly connected to the first battery and may be connected to the second battery via a switch. This alternator generates electric power as the engine rotates and charges the first battery. When the switch is on, the alternator can also charge the second battery via the switch.

また第１バッテリに第１負荷が直接に接続され、第２バッテリに第２負荷が直接に接続されることもある。この場合、第１負荷はスイッチを介して第２バッテリにも接続され、第２負荷はスイッチを介して第１バッテリにも接続される。   In addition, the first load may be directly connected to the first battery, and the second load may be directly connected to the second battery. In this case, the first load is also connected to the second battery via the switch, and the second load is also connected to the first battery via the switch.

なお本発明に関連する技術として特許文献１が公開されている。   Patent Document 1 is disclosed as a technique related to the present invention.

特開２００８−７２８８０号公報JP 2008-72880 A

上述の構成において、例えば第１バッテリと第１負荷との間において地絡が生じた場合、スイッチをオフすることで、第２バッテリと地絡とを遮断することができる。よってこの場合でも、第２バッテリの充電率が高いときには、第２バッテリから第２負荷への電力供給を行うことができる。   In the above configuration, for example, when a ground fault occurs between the first battery and the first load, the second battery and the ground fault can be cut off by turning off the switch. Therefore, even in this case, when the charging rate of the second battery is high, power can be supplied from the second battery to the second load.

しかしながら、地絡発生からスイッチがオフするまでの期間において、第２バッテリから当該地絡へと地絡電流が発生する。このような地絡電流は、負荷の動作に寄与せずに、第２バッテリの充電率を低下させる。よって、地絡電流を低減することが望まれる。   However, a ground fault current is generated from the second battery to the ground fault during a period from when the ground fault occurs until the switch is turned off. Such a ground fault current does not contribute to the operation of the load, but reduces the charging rate of the second battery. Therefore, it is desired to reduce the ground fault current.

そこで本発明は、地絡電流を低減できる車載電源用装置を提供することを目的とする。   Then, an object of this invention is to provide the apparatus for vehicle-mounted power supplies which can reduce a ground fault current.

車載電源用装置の第１の態様は、直流電圧を出力する発電機(1)と第１蓄電装置(21)とを結ぶ第１経路(R1)上に設けられ、前記発電機が前記第１蓄電装置を充電する充電電流が流れる方向を順方向とする第１ダイオード(D1)と、前記発電機と第２蓄電装置(22)とを結ぶ第２経路(R2)上に設けられ、前記発電機が前記第２蓄電装置を充電する充電電流が流れる方向を順方向とする第２ダイオード(D2)とを備える。   A first aspect of the in-vehicle power supply device is provided on a first path (R1) connecting a generator (1) that outputs a DC voltage and a first power storage device (21), and the generator is the first A first diode (D1) whose forward direction is a direction in which a charging current for charging the power storage device flows, and a second path (R2) connecting the generator and the second power storage device (22); And a second diode (D2) whose forward direction is a direction in which a charging current for charging the second power storage device flows.

車載電源用装置の第２の態様は、第１の態様にかかる車載電源用装置であって、前記第１経路(R1)は、共通経路と第１固有経路とを有し、前記発電機は、前記共通経路および前記第１固有経路をこの順で経由して前記第１蓄電装置に接続され、前記第２経路(R2)は、前記共通経路と第２固有経路(R21)とを有し、前記発電機は、前記共通経路および前記第２固有経路をこの順で経由して前記第１蓄電装置に接続され、前記第１ダイオードは前記第１固有経路の上に設けられ、前記第２ダイオードは前記第２固有経路の上に設けられる。   A second aspect of the in-vehicle power supply apparatus is the in-vehicle power supply apparatus according to the first aspect, wherein the first path (R1) has a common path and a first specific path, and the generator is The second route (R2) includes the common route and the second unique route (R21), which are connected to the first power storage device via the common route and the first unique route in this order. The generator is connected to the first power storage device via the common path and the second specific path in this order, the first diode is provided on the first specific path, and the second The diode is provided on the second intrinsic path.

車載電源用装置の第３の態様は、第１の態様にかかる車載電源用装置であって、前記第１経路(R1)は、共通経路と第１固有経路とを有し、前記発電機は、前記共通経路および前記第１固有経路をこの順で経由して前記第１蓄電装置に接続され、前記第２経路(R2)は、前記共通経路と第２固有経路(R21)とを有し、前記発電機は、前記共通経路および前記第２固有経路をこの順で経由して前記第１蓄電装置に接続され、前記第１ダイオードは前記共通経路の上に設けられ、前記第２ダイオードは前記第２固有経路の上に設けられる。   A third aspect of the in-vehicle power supply device is the in-vehicle power supply device according to the first aspect, wherein the first path (R1) has a common path and a first specific path, and the generator The second route (R2) includes the common route and the second unique route (R21), which are connected to the first power storage device via the common route and the first unique route in this order. The generator is connected to the first power storage device via the common path and the second inherent path in this order, the first diode is provided on the common path, and the second diode is It is provided on the second specific path.

車載電源用装置の第４の態様は、第１から第３のいずれか一つの態様にかかる車載電源用装置であって、前記第１蓄電装置(21)と第１負荷(31)との間に設けられる第１ヒューズ(512)を更に備える。   A fourth aspect of the in-vehicle power source device is the in-vehicle power source device according to any one of the first to third aspects, wherein the in-vehicle power source device is between the first power storage device (21) and the first load (31). The first fuse 512 is further provided.

車載電源用システムの態様は、第１から第４のいずれか一つの態様にかかる車載電源用装置(4)と、前記発電機(1)と、前記第１蓄電装置(21)と、前記第２蓄電装置(22)とを備える。   The on-vehicle power supply system includes an on-vehicle power supply device (4) according to any one of the first to fourth aspects, the generator (1), the first power storage device (21), and the first power storage device. 2 power storage device (22).

車載電源用装置の第１および第２の態様、並びに、車載用電源システムの態様によれば、例えば第１蓄電装置と、第1蓄電装置に接続される負荷との間において地絡が発生した場合、第２ダイオードが第２蓄電装置を地絡から遮断する。よって第２蓄電装置からの地絡電流を回避しつつ、第２蓄電装置が電力を供給できる。   According to the first and second aspects of the in-vehicle power supply device and the in-vehicle power supply system aspect, for example, a ground fault has occurred between the first power storage device and a load connected to the first power storage device. In this case, the second diode blocks the second power storage device from the ground fault. Therefore, the second power storage device can supply power while avoiding a ground fault current from the second power storage device.

車載電源用装置の第３の態様によれば、第２蓄電装置の電圧が第１蓄電装置の電圧よりも低い場合に好適である。   According to the third aspect of the in-vehicle power supply device, it is suitable when the voltage of the second power storage device is lower than the voltage of the first power storage device.

車載電源用装置の第４の態様によれば、第１蓄電装置と第１負荷との間に地絡が生じると、第１ヒューズが溶断する。これにより、発電機を当該地絡から遮断できる。したがって、発電機が第２蓄電装置を充電できる。   According to the fourth aspect of the on-vehicle power supply device, when a ground fault occurs between the first power storage device and the first load, the first fuse is blown. Thereby, a generator can be interrupted | blocked from the said ground fault. Therefore, the generator can charge the second power storage device.

車載用電源システムの一例を概略的に示す図である。1 is a diagram schematically showing an example of an in-vehicle power supply system. 地絡が生じたときの車載用電源システムの一例を概略的に示す図である。It is a figure which shows roughly an example of the vehicle-mounted power supply system when a ground fault arises. 車載用電源システムの他の一例を概略的に示す図である。It is a figure which shows roughly another example of a vehicle-mounted power supply system.

＜構成＞
図１は、車載用電源システム１００の構成の一例を概略的に示す図である。車載用電源システム１００は車両に搭載される。この車載用電源システム１００は発電機１と蓄電装置２１，２２と車載電源用装置４とを備えている。車載用電源システム１００は負荷３１，３２に電力を供給する。 <Configuration>
FIG. 1 is a diagram schematically showing an example of the configuration of the in-vehicle power supply system 100. The in-vehicle power supply system 100 is mounted on a vehicle. The in-vehicle power supply system 100 includes a generator 1, power storage devices 21 and 22, and an in-vehicle power supply device 4. The in-vehicle power supply system 100 supplies power to the loads 31 and 32.

発電機１は車載電源用装置４を介して蓄電装置２１，２２および負荷３１，３２に接続されている。発電機１は例えばオルタネータであって、エンジンの回転に伴って発電し、直流電圧を出力する。蓄電装置２２は例えば鉛バッテリである。蓄電装置２１は例えばリチウムイオン電池、ニッケル水素電池またはキャパシタである。   The generator 1 is connected to power storage devices 21 and 22 and loads 31 and 32 via a vehicle-mounted power supply device 4. The generator 1 is an alternator, for example, and generates power as the engine rotates and outputs a DC voltage. The power storage device 22 is, for example, a lead battery. The power storage device 21 is, for example, a lithium ion battery, a nickel metal hydride battery, or a capacitor.

車載電源用装置４はダイオードＤ１，Ｄ２を備えている。ダイオードＤ１は、発電機１と蓄電装置２１とを結ぶ経路Ｒ１の上に設けられる。なおここでいう経路とは、電流を流すことができる経路であって、電線を含む配線である。ダイオードＤ１の順方向は発電機１が蓄電装置２１を充電する充電電流が流れる方向であり、ここでは発電機１から蓄電装置２１へと向かう方向である。このダイオードＤ１は蓄電装置２１が発電機１へと放電することを阻止する。   The on-vehicle power supply device 4 includes diodes D1 and D2. The diode D1 is provided on a path R1 connecting the generator 1 and the power storage device 21. In addition, a path | route here is a path | route which can flow an electric current, Comprising: It is wiring containing an electric wire. The forward direction of the diode D <b> 1 is a direction in which a charging current for charging the power storage device 21 by the generator 1 flows, and here is a direction from the power generator 1 toward the power storage device 21. The diode D1 prevents the power storage device 21 from discharging to the generator 1.

ダイオードＤ２は、発電機１と蓄電装置２２とを結ぶ経路Ｒ２の上に設けられる。ダイオードＤ２の順方向は発電機１が蓄電装置２２を充電する充電電流が流れる方向であり、ここでは発電機１から蓄電装置２２へと向かう方向である。このダイオードＤ１は蓄電装置２２が発電機１へと放電することを阻止する。   The diode D2 is provided on a path R2 that connects the generator 1 and the power storage device 22. The forward direction of the diode D <b> 2 is a direction in which a charging current for charging the power storage device 22 by the generator 1 flows, and here is a direction from the power generator 1 toward the power storage device 22. The diode D1 prevents the power storage device 22 from discharging to the generator 1.

図１の例示では、経路Ｒ１は共通経路Ｒ３と固有経路Ｒ１１とを有しており、経路Ｒ２は共通経路Ｒ３と固有経路Ｒ２１とを有している。共通経路Ｒ３の一端は発電機１に接続されており、共通経路Ｒ３の他端は固有経路Ｒ１１，Ｒ１２の各々の一端に接続される。固有経路Ｒ１１は共通経路Ｒ３の他端を蓄電装置２１に接続する経路であり、固有経路Ｒ２１は共通経路Ｒ３の他端を蓄電装置２２に接続する経路である。つまり、発電機１は、共通経路Ｒ３および固有経路Ｒ１１をこの順で経由して蓄電装置２１に接続され、共通経路Ｒ３および固有経路Ｒ２１をこの順で経由して蓄電装置２２に接続される。図１の例示では、ダイオードＤ１は固有経路Ｒ１１の上に設けられており、ダイオードＤ２は固有経路Ｒ２１の上に設けられている。   In the illustration of FIG. 1, the route R1 has a common route R3 and a unique route R11, and the route R2 has a common route R3 and a unique route R21. One end of the common route R3 is connected to the generator 1, and the other end of the common route R3 is connected to one end of each of the unique routes R11 and R12. The unique path R11 is a path that connects the other end of the common path R3 to the power storage device 21, and the unique path R21 is a path that connects the other end of the common path R3 to the power storage device 22. That is, the generator 1 is connected to the power storage device 21 via the common route R3 and the unique route R11 in this order, and is connected to the power storage device 22 via the common route R3 and the unique route R21 in this order. In the example of FIG. 1, the diode D1 is provided on the unique path R11, and the diode D2 is provided on the unique path R21.

蓄電装置２１は負荷３１と接続されており、負荷３１へと電力を供給する。負荷３１は例えばＥＰＳ（Electric Power Steering：電動パワーステアリング）である。蓄電装置２２は負荷３２と接続されており、負荷３２へと電力を供給する。負荷３２も例えばＥＰＳであってもよい。このように負荷３１，３２が同じ機能を有すれば、いずれか一方の機能が損傷しても他方がその機能を維持できる。つまり機能の冗長性を向上することができる。   The power storage device 21 is connected to the load 31 and supplies power to the load 31. The load 31 is, for example, EPS (Electric Power Steering). The power storage device 22 is connected to the load 32 and supplies power to the load 32. The load 32 may also be EPS, for example. Thus, if the loads 31 and 32 have the same function, even if one of the functions is damaged, the other can maintain the function. That is, functional redundancy can be improved.

また図１に示すように、車載電源用装置４はヒューズ５１１，５１２，５２１，５２２を備えていてもよい。ヒューズ５１１は固有経路Ｒ１１において、蓄電装置２１とダイオードＤ１との間に接続されており、ヒューズ５１２は蓄電装置２１と負荷３１との間に接続されている。ヒューズ５２１は固有経路Ｒ２１において、蓄電装置２２とダイオードＤ２との間に接続されており、ヒューズ５２２は蓄電装置２２と負荷３２との間に接続されている。   Further, as shown in FIG. 1, the on-vehicle power supply device 4 may include fuses 511, 512, 521, 522. The fuse 511 is connected between the power storage device 21 and the diode D1 in the specific path R11, and the fuse 512 is connected between the power storage device 21 and the load 31. The fuse 521 is connected between the power storage device 22 and the diode D2 in the specific path R21, and the fuse 522 is connected between the power storage device 22 and the load 32.

次に、蓄電装置２１と負荷３１との間において地絡が発生した場合について考察する。図２は、当該地絡が生じたときの車載用電源システム１００の一例を概略的に示している。図２の例示では、この地絡Ｆ１を接地の図記号によって示している。   Next, a case where a ground fault occurs between the power storage device 21 and the load 31 will be considered. FIG. 2 schematically shows an example of the in-vehicle power supply system 100 when the ground fault occurs. In the illustration of FIG. 2, the ground fault F1 is indicated by a graphic symbol of grounding.

本車載用電源システム１００によれば、ダイオードＤ２が蓄電装置２２を地絡Ｆ２から遮断する。よって、蓄電装置２２から地絡Ｆ１へと流れる電流（以下、地絡電流と呼ぶ）の発生を回避することができる。つまり、本車載用電源システム１００によれば、スイッチによって蓄電装置２２を地絡Ｆ１から遮断するのではなく、ダイオードＤ２が遮断する。よって、地絡Ｆ１の発生と同時に蓄電装置２２が地絡Ｆ２から遮断される。したがって、蓄電装置２２からの地絡電流を低減できるのである。したがって、地絡電流による蓄電装置２２の放電は迅速に停止され、不要な充電率の低下を回避できる。   According to the in-vehicle power supply system 100, the diode D2 blocks the power storage device 22 from the ground fault F2. Therefore, it is possible to avoid the occurrence of a current flowing from the power storage device 22 to the ground fault F1 (hereinafter referred to as a ground fault current). That is, according to the in-vehicle power supply system 100, the power storage device 22 is not cut off from the ground fault F1 by the switch, but the diode D2 is cut off. Accordingly, the power storage device 22 is disconnected from the ground fault F2 simultaneously with the occurrence of the ground fault F1. Therefore, the ground fault current from the power storage device 22 can be reduced. Therefore, the discharge of the power storage device 22 due to the ground fault current is quickly stopped, and an unnecessary reduction in the charging rate can be avoided.

一方で、蓄電装置２１からは、地絡Ｆ１へと地絡電流が流れる。そして、この地絡電流により、ヒューズ５１２が溶断する。これにより、蓄電装置２１が地絡Ｆ１から遮断される。また発電機１も地絡Ｆ１から遮断される。よって、このヒューズ５１２の溶断以降において、発電機１が蓄電装置２２を充電する際に、発電機１から地絡Ｆ１へと電流が流れない。したがって効率的に蓄電装置２２を充電することができる。これによれば、より長期間に亘って負荷３２へと電力を供給できる。   On the other hand, a ground fault current flows from power storage device 21 to ground fault F1. The fuse 512 is blown by the ground fault current. Thereby, the electrical storage apparatus 21 is interrupted | isolated from the ground fault F1. The generator 1 is also disconnected from the ground fault F1. Therefore, after the fuse 512 is blown, when the generator 1 charges the power storage device 22, no current flows from the generator 1 to the ground fault F1. Therefore, the power storage device 22 can be charged efficiently. According to this, electric power can be supplied to the load 32 over a longer period.

次に、蓄電装置２２と負荷３２との間において地絡が発生した場合について考察する。この場合、ダイオードＤ１が蓄電装置２１を当該地絡から遮断する。よって、蓄電装置２１からの地絡電流を回避しつつ、蓄電装置２１が負荷３１へと電力を供給できる。   Next, a case where a ground fault occurs between the power storage device 22 and the load 32 will be considered. In this case, the diode D1 blocks the power storage device 21 from the ground fault. Therefore, the power storage device 21 can supply power to the load 31 while avoiding a ground fault current from the power storage device 21.

一方で、蓄電装置２２からは当該地絡へと地絡電流が流れる。この地絡電流により、ヒューズ５２２が溶断する。これにより、発電機１も当該地絡から遮断されるので、発電機１は蓄電装置２１を効率的に充電することができる。これによれば、より長期間に亘って負荷３１へと電力を供給することができる。   On the other hand, a ground fault current flows from the power storage device 22 to the ground fault. The fuse 522 is melted by this ground fault current. Thereby, since the generator 1 is also interrupted | blocked from the said ground fault, the generator 1 can charge the electrical storage apparatus 21 efficiently. According to this, electric power can be supplied to the load 31 over a longer period.

図３は、車載用電源システム１００Ａの構成の一例を示す図である。車載用電源システム１００Ａは、ダイオードＤ１，Ｄ２の設置位置という点で、車載用電源システム１００と相違する。車載用電源システム１００Ａにおいては、ダイオードＤ１は共通経路Ｒ３の上に設けられており、ダイオードＤ２は固有経路Ｒ２１の上に設けられている。   FIG. 3 is a diagram illustrating an example of the configuration of the in-vehicle power supply system 100A. The in-vehicle power supply system 100A is different from the in-vehicle power supply system 100 in that the diodes D1 and D2 are installed. In the in-vehicle power supply system 100A, the diode D1 is provided on the common path R3, and the diode D2 is provided on the specific path R21.

これによっても、負荷３１と蓄電装置２１との間において地絡が発生したときには、ダイオードＤ２が蓄電装置２２を当該地絡から遮断することができる。よって、蓄電装置２２からの地絡電流を回避しつつ、負荷３２へと電力を供給できる。   Also in this case, when a ground fault occurs between the load 31 and the power storage device 21, the diode D2 can block the power storage device 22 from the ground fault. Therefore, electric power can be supplied to the load 32 while avoiding a ground fault current from the power storage device 22.

また車載用電源システム１００Ａにおいては、蓄電装置２２と発電機１との間には、２つのダイオードＤ１，Ｄ２が介在し、蓄電装置２１と発電機１との間には、１つのダイオードＤ１が介在している。つまり、蓄電装置２１と発電機１との間に介在するダイオードの数は、蓄電装置２２と発電機１との間に介在するダイオードの数よりも少ない。よって、発電機１から蓄電装置２２へと印加される電圧は、発電機１から蓄電装置２１へと印加される電圧よりも小さい。これは、蓄電装置２２の電圧（例えば定格電圧）が蓄電装置２１（例えば定格電圧）よりも小さいときに好適である。例えばニッケル水素電池の電圧は１３．６［Ｖ］程度であり、鉛バッテリの電圧は１２．５〜１３［Ｖ］程度である。よって蓄電装置２１にニッケル水素電池を、蓄電装置２２に鉛バッテリを、それぞれ採用する場合に、車載用電源システム１００Ａの構成は好適である。   In the in-vehicle power supply system 100A, two diodes D1 and D2 are interposed between the power storage device 22 and the generator 1, and one diode D1 is interposed between the power storage device 21 and the generator 1. Intervene. That is, the number of diodes interposed between the power storage device 21 and the generator 1 is smaller than the number of diodes interposed between the power storage device 22 and the generator 1. Therefore, the voltage applied from power generator 1 to power storage device 22 is smaller than the voltage applied from power generator 1 to power storage device 21. This is suitable when the voltage (for example, rated voltage) of the power storage device 22 is smaller than the power storage device 21 (for example, rated voltage). For example, the voltage of the nickel metal hydride battery is about 13.6 [V], and the voltage of the lead battery is about 12.5 to 13 [V]. Therefore, the configuration of the in-vehicle power supply system 100A is suitable when a nickel metal hydride battery is used for the power storage device 21 and a lead battery is used for the power storage device 22.

上記各実施形態及び各変形例で説明した各構成は、相互に矛盾しない限り適宜組み合わせることができる。   Each structure demonstrated by each said embodiment and each modification can be suitably combined unless it mutually contradicts.

以上のようにこの発明は詳細に説明されたが、上記した説明は、すべての局面において、例示であって、この発明がそれに限定されるものではない。例示されていない無数の変形例が、この発明の範囲から外れることなく想定され得るものと解される。   As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

１ 発電機
２１，２２ 蓄電装置（第１蓄電装置、第２蓄電装置）
３１，３２ 負荷（第１負荷、第２負荷）
４ 車載電源用装置
１００ 車載用電源システム
Ｄ１，Ｄ２ ダイオード（第１ダイオード、第２ダイオード）
Ｒ１，Ｒ２ 経路
Ｒ３ 共通経路
Ｒ１１，Ｒ２１ 固有経路
５１２，５２２ ヒューズ（第１ヒューズ、第２ヒューズ） 1 generator 21, 22 power storage device (first power storage device, second power storage device)
31, 32 load (first load, second load)
4 On-vehicle power supply device 100 On-vehicle power supply system D1, D2 Diode (first diode, second diode)
R1, R2 path R3 common path R11, R21 specific path 512, 522 fuse (first fuse, second fuse)

Claims (5)

直流電圧を出力する発電機と第１蓄電装置とを結ぶ第１経路の上に設けられ、前記発電機が前記第１蓄電装置を充電する充電電流が流れる方向を順方向とする第１ダイオードと、
前記発電機と第２蓄電装置とを結ぶ第２経路の上に設けられ、前記発電機が前記第２蓄電装置を充電する充電電流が流れる方向を順方向とする第２ダイオードと
を備える、車載電源用装置。 A first diode provided on a first path connecting a generator that outputs a DC voltage and the first power storage device, the forward direction being a direction in which a charging current for charging the first power storage device by the generator flows; ,
An in-vehicle device comprising: a second diode provided on a second path connecting the generator and the second power storage device, wherein the generator has a forward direction in which a charging current for charging the second power storage device flows. Power supply device. 請求項１に記載の車載電源用装置であって、
前記第１経路は、共通経路と第１固有経路とを有し、
前記発電機は、前記共通経路および前記第１固有経路をこの順で経由して前記第１蓄電装置に接続され、
前記第２経路は、前記共通経路と第２固有経路とを有し、
前記発電機は、前記共通経路および前記第２固有経路をこの順で経由して前記第１蓄電装置に接続され、
前記第１ダイオードは前記第１固有経路の上に設けられ、前記第２ダイオードは前記第２固有経路の上に設けられる、車載電源用装置。 The on-vehicle power supply device according to claim 1,
The first route has a common route and a first unique route;
The generator is connected to the first power storage device via the common path and the first inherent path in this order,
The second route has the common route and a second unique route,
The generator is connected to the first power storage device via the common path and the second specific path in this order,
The on-vehicle power supply device, wherein the first diode is provided on the first specific path, and the second diode is provided on the second specific path. 請求項１に記載の車載電源用装置であって、
前記第１経路は、共通経路と第１固有経路とを有し、
前記発電機は、前記共通経路および前記第１固有経路をこの順で経由して前記第１蓄電装置に接続され、
前記第２経路は、前記共通経路と第２固有経路とを有し、
前記発電機は、前記共通経路および前記第２固有経路をこの順で経由して前記第１蓄電装置に接続され、
前記第１ダイオードは前記共通経路の上に設けられ、前記第２ダイオードは前記第２固有経路の上に設けられる、車載電源用装置。 The on-vehicle power supply device according to claim 1,
The first route has a common route and a first unique route;
The generator is connected to the first power storage device via the common path and the first inherent path in this order,
The second route has the common route and a second unique route,
The generator is connected to the first power storage device via the common path and the second specific path in this order,
The on-vehicle power supply device, wherein the first diode is provided on the common path, and the second diode is provided on the second specific path. 請求項１から請求項３のいずれか１項に記載の車載電源用装置であって、
前記第１蓄電装置と第１負荷との間に設けられる第１ヒューズを更に備える、車載電源用装置。 The on-vehicle power supply device according to any one of claims 1 to 3,
The on-vehicle power supply device further comprising a first fuse provided between the first power storage device and the first load. 請求項１から請求項４のいずれか１項に記載の車載電源用装置と、
前記発電機と、
前記第１蓄電装置と、
前記第２蓄電装置と
を備える、車載用電源システム。 The on-vehicle power supply device according to any one of claims 1 to 4,
The generator;
The first power storage device;
An in-vehicle power supply system comprising the second power storage device.
JP2016082723A 2016-04-18 2016-04-18 Vehicle mounted power supply device and vehicle mounted power supply system Pending JP2017195652A (en)

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JPH0946919A (en) * 1995-08-02 1997-02-14 Sawafuji Electric Co Ltd Battery isolator
JPH1159293A (en) * 1997-08-12 1999-03-02 Furukawa Electric Co Ltd:The Power source device for vehicle and power source system for vehicle
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