WO2011093110A1 - Electric storage apparatus - Google Patents

Electric storage apparatus Download PDF

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Publication number
WO2011093110A1
WO2011093110A1 PCT/JP2011/000546 JP2011000546W WO2011093110A1 WO 2011093110 A1 WO2011093110 A1 WO 2011093110A1 JP 2011000546 W JP2011000546 W JP 2011000546W WO 2011093110 A1 WO2011093110 A1 WO 2011093110A1
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WO
WIPO (PCT)
Prior art keywords
connection
storage device
power storage
switching means
connection switching
Prior art date
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PCT/JP2011/000546
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French (fr)
Japanese (ja)
Inventor
高村侯威
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パナソニック株式会社
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Publication of WO2011093110A1 publication Critical patent/WO2011093110A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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

Definitions

  • the present invention relates to a power storage device that switches a connection state of power storage devices when charging / discharging a plurality of power storage devices such as a secondary battery provided in an automobile or the like.
  • the first storage battery supplies a low voltage for electrical components.
  • This 1st storage battery supplies a high voltage for driving
  • the first storage battery is used for both low voltage and high voltage, and if the capacity of the first storage battery and the other storage battery is the same, the first storage battery can be used for low voltage. Since it is used also for the voltage, it has the subject that the lifetime of a storage battery becomes short.
  • the present invention has been made to solve the conventional problems, and an object of the present invention is to provide a power storage device capable of extending the life of the power storage device even if all the power storage devices have the same capacity.
  • a first power storage device, a second power storage device, and one of connection destinations is connected to a high-voltage side terminal of the first power storage device, and the other of the connection destinations is a power source.
  • a first connection switching unit that is switched and connected to either one of the connection unit or the load that supplies, and one of the connection destinations is connected to the low-voltage side terminal of the first power storage device, and the other of the connection destinations is the load or
  • a second connection switching unit that is switched and connected to one of the grounds; one of the connection destinations is connected to the high-voltage side terminal of the second power storage device, and the other of the connection destinations is either the load or the connection unit
  • a third connection switching means that is connected to one of the switches, and one of the connection destinations is connected to the low-voltage side terminal of the second power storage device, and the other of the connection destinations is switched to either the ground ground or the load.
  • An ECU connected to the means, wherein the ECU monitors a first voltage state of the first power storage device and a second voltage state of the second power storage device, and the first voltage state and the second voltage
  • the other connection destination of the first connection switching means is connected to the load
  • the other connection destination of the second connection switching means is connected to the ground
  • the other connection destination of the third connection switching means is connected to the connection means
  • the other connection destination of the fourth connection switching means is connected to the load
  • voltage application to the load is applied to the first power storage.
  • Device and second power storage device Scan takes a configuration in which supplied alternately switched from the.
  • the ECU monitors the voltage state of the first power storage device and the voltage state of the second power storage device, and when the potential difference between these power storage devices becomes equal to or greater than a certain value, the first, second, third, The fourth connection switching means is controlled so that voltage application to the load is switched from the first power storage device and the second power storage device, that is, the power storage device that supplies power to the load according to the use states of the plurality of power storage devices Therefore, the life of the electricity storage device can be extended.
  • the life of the power storage devices can be extended.
  • FIG. 1 is a block diagram showing a configuration of a power storage device in Embodiment 1 of the present invention.
  • 1 is a block diagram showing a configuration of a power storage device in Embodiment 1 of the present invention.
  • the block diagram which shows the structure of the electrical storage apparatus in Embodiment 2 of this invention The block diagram which shows the structure of the electrical storage apparatus in Embodiment 3 of this invention.
  • Block diagram showing a configuration of a power storage device in Embodiment 4 of the present invention Block diagram showing a configuration of a power storage device in Embodiment 4 of the present invention
  • FIG. 1 is a block diagram showing a configuration of a power storage device according to Embodiment 1 of the present invention.
  • the first connecting means 1 is connected to a power supply source (not shown) that supplies power to the power storage device and the load.
  • One of the first connection switching means 2 is connected to the high voltage side terminal of the first power storage device 6 and the other is connected to the first connection means 1.
  • One of the second connection switching means 3 is connected to the low voltage side terminal of the first power storage device 6 and the other is connected to the load 11 via the second connection means 9 and the third connection means 10.
  • One of the third connection switching means 4 is connected to the high voltage side terminal of the second power storage device 7 and the other is connected to the load 11 via the second connection means 9 and the third connection means 10.
  • One of the fourth connection switching means 5 is connected to the low voltage side terminal of the second power storage device 7 and the other is connected to the ground ground 12.
  • the ECU 8 is connected to the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, the fourth connection switching means 5, the first power storage device 6, and the second power storage device 7.
  • the load 11 is connected to the second connection switching means 3 and the third connection switching means 4 via the second connection means 9 and the third connection means 10.
  • the power from the power supply source includes the first connection means 1, the first connection switching means 2, the high voltage side terminal, the low voltage side terminal, the second connection switching means 3, and the second connection switching means 3.
  • the connecting means 9, the third connecting means 10, and the load 11 are supplied in this order.
  • the ECU 8 monitors the voltage state of the first power storage device 6 and the second power storage device 7, and controls the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, and the fourth connection switching means 5.
  • the first power storage device 6 and the second power storage device 7 are lead batteries, which are 12 to 14 [V] in a steady state.
  • a load 11 exists between the first power storage device 6 and the second power storage device 7, and power is supplied from the first power storage device 6 to the load 11.
  • ECU8 monitors the voltage state of the 1st electrical storage device 6 and the 2nd electrical storage device 7, on condition that the voltage difference of the 1st electrical storage device 6 and the 2nd electrical storage device 7 is 1 [V] or more, for example When the first power storage device 6 is 12 [V] or lower and the second power storage device 7 is 13 [V] or higher, the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, the fourth The connection state of the connection switching means 5 is switched to the state shown in FIG. In this state, power is supplied from the second power storage device 7 to the load 11 instead of the first power storage device 6.
  • the power from the power supply source includes the first connection means 1, the third connection switching means 4, the high voltage side terminal, the low voltage side terminal, the fourth connection switching means 5, and the third connection switching means 5.
  • the connecting means 10 and the load 11 are supplied in this order.
  • a load 11 exists between the first power storage device 6 and the second power storage device 7, and power is supplied from the second power storage device 7 to the load 11.
  • ECU8 monitors the voltage state of the 1st electrical storage device 6 and the 2nd electrical storage device 7, on condition that the voltage difference of the 1st electrical storage device 6 and the 2nd electrical storage device 7 is 1 [V] or more, for example When the first power storage device 6 is 13 [V] or higher and the second power storage device 7 is 12 [V] or lower, the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, the fourth The connection state of the connection switching means 5 is switched to the state shown in FIG. In this state, power is supplied from the first power storage device 6 to the load 11 instead of the second power storage device 7.
  • the first and second power storage devices can be switched by alternately switching the first power storage device 6 and the second power storage device 7 that supply power to the load 11.
  • the lifetime of 6, 7 can be extended.
  • the load 11 acquires the voltage equivalent to a single electrical storage device by acquiring a voltage from the connection place of the same electric potential. Therefore, it is not necessary to use a voltage converter such as a DC / DC converter, and the manufacturing cost can be reduced.
  • FIG. 3 is a block diagram of a power storage device according to Embodiment 2 of the present invention.
  • the fourth connecting means 13 and the power storage element 14 are added to the first embodiment.
  • one of the storage elements 14 is connected in parallel with the load 11 via the fourth connection means 13, and the other is connected to the ground ground 12.
  • the first power storage device 6 When the voltage source applied to the load 11 changes from the first power storage device 6 to the second power storage device 7, or when the voltage source changes from the second power storage device 7 to the first power storage device 6, the first power storage device 6 also Even during a period in which no voltage is applied from the second power storage device 7, the power storage element 14 supplies a voltage to the load 11, so that the voltage source of the load 11 is not lost.
  • the power supply voltage to the load 11 is prevented from being momentarily interrupted. can do.
  • FIGS. 4 and 5 are block diagrams of the power storage device according to Embodiment 3 of the present invention.
  • symbol is attached
  • the description is abbreviate
  • first power storage device 6 and the second power storage device 7 are connected in parallel to supply power to the load 11.
  • first power storage device 6 and the second power storage device 7 are connected in parallel and charged from the first connection means 1. This will be described in detail below.
  • the ECU 8 controls switching of the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, and the fourth connection switching means 5.
  • the ECU 8 when discharging the first power storage device 6 and the second power storage device 7, the ECU 8 connects the other of the first connection switching means 2 to the load 11, and the second connection switching means.
  • the other of the third connection switching means 4 is connected to the load 11, and the other of the fourth connection switching means 5 is connected to the ground ground 12.
  • the ECU 8 when charging the first power storage device 6 and the second power storage device 7, the ECU 8 connects the other of the first connection switching means 2 to the first connection means 1, and the second connection switching means. And the other of the third connection switching means 4 is connected to the first connection means 1 and the other of the fourth connection switching means 5 is connected to the ground ground 12. To do.
  • the first power storage device 6 and the second power storage device 7 are connected in parallel by switching the power storage devices according to the charge / discharge states of the plurality of power storage devices. It is possible to supply power to the load 11 or switch charging.
  • FIGS. 6 and 7 are block diagrams of the power storage device according to Embodiment 4 of the present invention.
  • symbol is attached
  • the description is abbreviate
  • the first power storage device 6 is charged and the second power storage device 7 supplies power to the load 11.
  • the second power storage device 7 is charged and the first power storage device 6 supplies power to the load 11. This will be described in detail below.
  • the ECU 8 changes the other of the first connection switching means 2 to the first connection means 1.
  • the other of the second connection switching means 3 is connected to the ground ground 12
  • the other of the third connection switching means 4 is connected to the load 11
  • the other of the fourth connection switching means 5 is connected to the ground. Control to connect to ground 12.
  • the ECU 8 connects the other of the first connection switching means 2 to the load 11 when the voltage of the high voltage side terminal of the first power storage device 6 is larger than the voltage of the high voltage side terminal of the second power storage device 7, and
  • the other of the second connection switching means 3 is connected to the ground ground 12
  • the other of the third connection switching means 4 is connected to the first connection means 1
  • the other of the fourth connection switching means 5 is connected to the ground ground 12. Control to connect.
  • the power storage amount of the first power storage device 6 and the second power storage device 7 is larger by switching the power storage devices according to the charge / discharge states of the plurality of power storage devices. At the same time as supplying power to the load 11, the first power storage device 6 and the second power storage device 7 with the smaller amount of power storage can be charged.
  • the present invention is suitable for a power storage device having a plurality of power storage devices such as a secondary battery provided in an automobile or the like.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Provided is an electric storage apparatus which is capable of increasing the life of an electric storage device. In the electric storage apparatus, an ECU (8) is connected with a first connection switching means (2), a second connection switching means (3), a third connection switching means (4), a fourth connection switching means (5), a first electric storage device (6), and a second electric storage device (7). The ECU (8) monitors a voltage state of each of the first electric storage device (6) and the second electric storage device (7). In the case where a potential difference between the first electric storage device (6) and the second electric storage device (7) is a certain level or more, the ECU (8) controls the first connection switching means (2), the second connection switching means (3), the third connection switching means (4), and the fourth connection switching means (5), and alternately switches the first electric storage device (6) and the second electric storage device (7) for a power source for a supply to a load (11).

Description

蓄電装置Power storage device
　本発明は、自動車などに設けられている二次電池等の複数の蓄電デバイスに対する充放電時に、蓄電デバイスの接続状態の切り換えを行う蓄電装置に関するものである。 The present invention relates to a power storage device that switches a connection state of power storage devices when charging / discharging a plurality of power storage devices such as a secondary battery provided in an automobile or the like.
　従来の蓄電装置として、第１蓄電池は、電装品用として低電圧を供給する。この第１蓄電池は、他の複数の蓄電池と共に、走行駆動用として高電圧も供給する。第１蓄電池は、電装品用としての低電圧供給と、走行駆動用としての高電圧供給を兼ねているため、スイッチで低電圧用か高電圧用かの使用状態を切り換えて、使用される（特許文献１参照）。 As a conventional power storage device, the first storage battery supplies a low voltage for electrical components. This 1st storage battery supplies a high voltage for driving | running | working driving with other several storage batteries. Since the first storage battery serves both as a low voltage supply for electrical components and a high voltage supply for travel driving, the first storage battery is used by switching the use state for low voltage or high voltage with a switch ( Patent Document 1).
特開平７－１７０６１０号公報JP-A-7-170610
　しかしながら、従来の蓄電装置では、第１蓄電池は低電圧用および高電圧用を兼用しており、第１蓄電池と他の蓄電池の容量が同一であると、第１蓄電池は低電圧用でも、高電圧用でも使用されるため、蓄電池の寿命が短くなるという課題を有している。 However, in the conventional power storage device, the first storage battery is used for both low voltage and high voltage, and if the capacity of the first storage battery and the other storage battery is the same, the first storage battery can be used for low voltage. Since it is used also for the voltage, it has the subject that the lifetime of a storage battery becomes short.
　本発明は、従来の問題を解決するためになされたもので、全ての蓄電デバイスの容量が同一でも、蓄電デバイスの寿命を長くすることができる蓄電装置を提供することを目的とする。 The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a power storage device capable of extending the life of the power storage device even if all the power storage devices have the same capacity.
　本発明の態様の一つに係る蓄電装置は、第１蓄電デバイスと、第２蓄電デバイスと、接続先の一方が前記第１蓄電デバイスの高圧側端子に接続され、前記接続先の他方が電源供給を行う接続手段または負荷のいずれか一方に切替接続される第１接続切換手段と、接続先の一方が前記第１蓄電デバイスの低圧側端子に接続され、前記接続先の他方が前記負荷またはグランド接地のいずれか一方に切替接続される第２接続切換手段と、接続先の一方が前記第２蓄電デバイスの高圧側端子に接続され、前記接続先の他方が前記負荷または前記接続手段のいずれか一方に切替接続される第３接続切換手段と、接続先の一方が前記第２蓄電デバイスの低圧側端子に接続され、前記接続先の他方が前記グランド接地または前記負荷のいずれか一方に切替接続される第４接続切換手段と、前記第１蓄電デバイス、前記第２蓄電デバイス、前記第１接続切換手段、前記第２接続切換手段、前記第３接続切換手段、および、前記第４接続切換手段に接続されるＥＣＵと、を備え、前記ＥＣＵが、前記第１蓄電デバイスの第１電圧状態および前記第２蓄電デバイスの第２電圧状態を監視し、前記第１電圧状態と前記第２電圧状態との間に一定以上の電位差がある場合、前記第１接続切換手段の他方の接続先を前記負荷に接続し、前記第２接続切換手段の他方の接続先を前記グランド接地に接続し、前記第３接続切換手段の他方の接続先を前記接続手段に接続し、かつ、前記第４接続切換手段の他方の接続先を前記負荷に接続して、前記負荷に対する電圧印加を前記第１蓄電デバイスと前記第２蓄電デバイスとから交互に切り替えて供給させる構成を採る。 In a power storage device according to one aspect of the present invention, a first power storage device, a second power storage device, and one of connection destinations is connected to a high-voltage side terminal of the first power storage device, and the other of the connection destinations is a power source. A first connection switching unit that is switched and connected to either one of the connection unit or the load that supplies, and one of the connection destinations is connected to the low-voltage side terminal of the first power storage device, and the other of the connection destinations is the load or A second connection switching unit that is switched and connected to one of the grounds; one of the connection destinations is connected to the high-voltage side terminal of the second power storage device, and the other of the connection destinations is either the load or the connection unit A third connection switching means that is connected to one of the switches, and one of the connection destinations is connected to the low-voltage side terminal of the second power storage device, and the other of the connection destinations is switched to either the ground ground or the load. Fourth connection switching means to be continued, the first power storage device, the second power storage device, the first connection switching means, the second connection switching means, the third connection switching means, and the fourth connection switching An ECU connected to the means, wherein the ECU monitors a first voltage state of the first power storage device and a second voltage state of the second power storage device, and the first voltage state and the second voltage When there is a certain potential difference between the state and the state, the other connection destination of the first connection switching means is connected to the load, the other connection destination of the second connection switching means is connected to the ground, The other connection destination of the third connection switching means is connected to the connection means, and the other connection destination of the fourth connection switching means is connected to the load, and voltage application to the load is applied to the first power storage. Device and second power storage device Scan takes a configuration in which supplied alternately switched from the.
　この構成によれば、ＥＣＵが第１蓄電デバイスの電圧状態、第２蓄電デバイスの電圧状態を監視し、これらの蓄電デバイスの電位差が一定以上になった場合、第１、第２、第３、第４接続切換手段を制御して負荷に対する電圧印加を第１蓄電デバイスと第２蓄電デバイスとから切り換えて供給させる、つまり、負荷に電源を供給する蓄電デバイスを複数の蓄電デバイスの使用状態に応じて切り換えるので、蓄電デバイスの寿命を長くすることができる。 According to this configuration, the ECU monitors the voltage state of the first power storage device and the voltage state of the second power storage device, and when the potential difference between these power storage devices becomes equal to or greater than a certain value, the first, second, third, The fourth connection switching means is controlled so that voltage application to the load is switched from the first power storage device and the second power storage device, that is, the power storage device that supplies power to the load according to the use states of the plurality of power storage devices Therefore, the life of the electricity storage device can be extended.
　本発明によれば、全ての蓄電デバイスの容量が同一でも、蓄電デバイスの寿命を長くすることができる。 According to the present invention, even if the capacities of all the power storage devices are the same, the life of the power storage devices can be extended.
本発明の実施の形態１における蓄電装置の構成を示すブロック図1 is a block diagram showing a configuration of a power storage device in Embodiment 1 of the present invention. 本発明の実施の形態１における蓄電装置の構成を示すブロック図1 is a block diagram showing a configuration of a power storage device in Embodiment 1 of the present invention. 本発明の実施の形態２における蓄電装置の構成を示すブロック図The block diagram which shows the structure of the electrical storage apparatus in Embodiment 2 of this invention 本発明の実施の形態３における蓄電装置の構成を示すブロック図The block diagram which shows the structure of the electrical storage apparatus in Embodiment 3 of this invention. 本発明の実施の形態３における蓄電装置の構成を示すブロック図The block diagram which shows the structure of the electrical storage apparatus in Embodiment 3 of this invention. 本発明の実施の形態４における蓄電装置の構成を示すブロック図Block diagram showing a configuration of a power storage device in Embodiment 4 of the present invention 本発明の実施の形態４における蓄電装置の構成を示すブロック図Block diagram showing a configuration of a power storage device in Embodiment 4 of the present invention
　以下、本発明の実施の形態の蓄電装置について、図面を用いて説明する。 Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings.
　（実施の形態１）
　図１は、本発明の実施の形態１における蓄電装置の構成を示すブロック図である。 (Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a power storage device according to Embodiment 1 of the present invention.
　図１の蓄電装置において、第１接続手段１は蓄電デバイスや負荷に電力を供給する電力供給源（図示なし）と接続されている。 1, the first connecting means 1 is connected to a power supply source (not shown) that supplies power to the power storage device and the load.
　第１接続切換手段２は、一方が第１蓄電デバイス６の高電圧側端子と接続され、他方は第１接続手段１と接続される。 One of the first connection switching means 2 is connected to the high voltage side terminal of the first power storage device 6 and the other is connected to the first connection means 1.
　第２接続切換手段３は、一方が第１蓄電デバイス６の低電圧側端子と接続され、他方は第２接続手段９、第３接続手段１０を介して負荷1１と接続される。 One of the second connection switching means 3 is connected to the low voltage side terminal of the first power storage device 6 and the other is connected to the load 11 via the second connection means 9 and the third connection means 10.
　第３接続切換手段４は、一方が第２蓄電デバイス７の高電圧側端子と接続され、他方は第２接続手段９、第３接続手段１０を介して負荷１１と接続される。 One of the third connection switching means 4 is connected to the high voltage side terminal of the second power storage device 7 and the other is connected to the load 11 via the second connection means 9 and the third connection means 10.
　第４接続切換手段５は、一方が第２蓄電デバイス７の低電圧側端子と接続され、他方はグランド接地１２と接続される。 One of the fourth connection switching means 5 is connected to the low voltage side terminal of the second power storage device 7 and the other is connected to the ground ground 12.
　ＥＣＵ８は、第１接続切換手段２、第２接続切換手段３、第３接続切換手段４、第４接続切換手段５、第１蓄電デバイス６、第２蓄電デバイス７と接続されている。負荷１１は、第２接続手段９、第３接続手段１０を介して、第２接続切換手段３、第３接続切換手段４と接続されている。 The ECU 8 is connected to the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, the fourth connection switching means 5, the first power storage device 6, and the second power storage device 7. The load 11 is connected to the second connection switching means 3 and the third connection switching means 4 via the second connection means 9 and the third connection means 10.
　以上のように構成された蓄電装置について、以下にその動作を説明する。 The operation of the power storage device configured as described above will be described below.
　図１において、電力供給源からの電力は、第１接続手段１、第１接続切換手段２、第１蓄電デバイス６の高電圧側端子、低電圧側端子、第２接続切換手段３、第２接続手段９、第３接続手段１０、負荷１１の順番で供給される。 In FIG. 1, the power from the power supply source includes the first connection means 1, the first connection switching means 2, the high voltage side terminal, the low voltage side terminal, the second connection switching means 3, and the second connection switching means 3. The connecting means 9, the third connecting means 10, and the load 11 are supplied in this order.
　ＥＣＵ８は、第１蓄電デバイス６と第２蓄電デバイス７の電圧状態を監視し、第１接続切換手段２、第２接続切換手段３、第３接続切換手段４、第４接続切換手段５を制御する。例えば、第１蓄電デバイス６、第２蓄電デバイス７は鉛バッテリであり、定常状態では１２～１４［Ｖ]である。第１蓄電デバイス６と第２蓄電デバイス７の間には負荷１１が存在し、第１蓄電デバイス６から負荷１１へ電力が供給される。ＥＣＵ８は、第１蓄電デバイス６、第２蓄電デバイス７の電圧状態を監視し、第１蓄電デバイス６と第２蓄電デバイス７との電圧差が１［Ｖ］以上であることを条件として、例えば、第１蓄電デバイス６が１２［Ｖ］以下、第２蓄電デバイス７が１３［Ｖ］以上のとき、第１接続切換手段２、第２接続切換手段３、第３接続切換手段４、第４接続切換手段５の接続状態を、図２の状態に切り換える。この状態では、第１蓄電デバイス６ではなく、第２蓄電デバイス７から負荷１１へ電力が供給される。 The ECU 8 monitors the voltage state of the first power storage device 6 and the second power storage device 7, and controls the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, and the fourth connection switching means 5. To do. For example, the first power storage device 6 and the second power storage device 7 are lead batteries, which are 12 to 14 [V] in a steady state. A load 11 exists between the first power storage device 6 and the second power storage device 7, and power is supplied from the first power storage device 6 to the load 11. ECU8 monitors the voltage state of the 1st electrical storage device 6 and the 2nd electrical storage device 7, on condition that the voltage difference of the 1st electrical storage device 6 and the 2nd electrical storage device 7 is 1 [V] or more, for example When the first power storage device 6 is 12 [V] or lower and the second power storage device 7 is 13 [V] or higher, the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, the fourth The connection state of the connection switching means 5 is switched to the state shown in FIG. In this state, power is supplied from the second power storage device 7 to the load 11 instead of the first power storage device 6.
　図２において、電力供給源からの電力は、第１接続手段１、第３接続切換手段４、第２蓄電デバイス７の高電圧側端子、低電圧側端子、第４接続切換手段５、第３接続手段１０、負荷１１の順番で供給される。 In FIG. 2, the power from the power supply source includes the first connection means 1, the third connection switching means 4, the high voltage side terminal, the low voltage side terminal, the fourth connection switching means 5, and the third connection switching means 5. The connecting means 10 and the load 11 are supplied in this order.
　第１蓄電デバイス６と第２蓄電デバイス７の間には負荷１１が存在し、第２蓄電デバイス７から負荷１１へ電力が供給される。ＥＣＵ８は、第１蓄電デバイス６、第２蓄電デバイス７の電圧状態を監視し、第１蓄電デバイス６と第２蓄電デバイス７との電圧差が１［Ｖ］以上であることを条件として、例えば、第１蓄電デバイス６が１３［Ｖ］以上、第２蓄電デバイス７が１２［Ｖ］以下のとき、第１接続切換手段２、第２接続切換手段３、第３接続切換手段４、第４接続切換手段５の接続状態を、図１の状態に切り換える。この状態では、第２蓄電デバイス７ではなく、第１蓄電デバイス６から負荷１１へ電力が供給される。 A load 11 exists between the first power storage device 6 and the second power storage device 7, and power is supplied from the second power storage device 7 to the load 11. ECU8 monitors the voltage state of the 1st electrical storage device 6 and the 2nd electrical storage device 7, on condition that the voltage difference of the 1st electrical storage device 6 and the 2nd electrical storage device 7 is 1 [V] or more, for example When the first power storage device 6 is 13 [V] or higher and the second power storage device 7 is 12 [V] or lower, the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, the fourth The connection state of the connection switching means 5 is switched to the state shown in FIG. In this state, power is supplied from the first power storage device 6 to the load 11 instead of the second power storage device 7.
　また、図１、図２のいずれの状態においても、負荷１１へは単一蓄電デバイス相当の電圧（１２～１４［Ｖ]）が印加される。 1 and 2, a voltage equivalent to a single power storage device (12 to 14 [V]) is applied to the load 11.
　以上のように、実施の形態１の蓄電装置によれば、負荷１１に対して電力を供給する第１蓄電デバイス６、第２蓄電デバイス７を交互に切り換えることにより、第１、第２蓄電デバイス６、７の寿命を長くすることができる。 As described above, according to the power storage device of the first embodiment, the first and second power storage devices can be switched by alternately switching the first power storage device 6 and the second power storage device 7 that supply power to the load 11. The lifetime of 6, 7 can be extended.
　また、本実施の形態では、２つの蓄電デバイスがいずれの順番で直列になった場合でも、負荷１１は同電位の接続箇所より電圧を取得することで、単一蓄電デバイス相当の電圧を取得するので、ＤＣ／ＤＣコンバータなどの電圧変換装置を用いる必要が無くなり、製造コストを下げることができる。 Moreover, in this Embodiment, even if two electrical storage devices are connected in series in any order, the load 11 acquires the voltage equivalent to a single electrical storage device by acquiring a voltage from the connection place of the same electric potential. Therefore, it is not necessary to use a voltage converter such as a DC / DC converter, and the manufacturing cost can be reduced.
　（実施の形態２） 
　図３は、本発明の実施の形態２に係る蓄電装置のブロック図である。本実施の形態では、実施の形態１に、第４接続手段１３と蓄電素子１４の構成要素を追加している。図３において、蓄電素子１４は、一方は第４接続手段１３を介して負荷１１と並列接続されており、他方はグランド接地１２に接続されている。 (Embodiment 2)
FIG. 3 is a block diagram of a power storage device according to Embodiment 2 of the present invention. In the present embodiment, the fourth connecting means 13 and the power storage element 14 are added to the first embodiment. In FIG. 3, one of the storage elements 14 is connected in parallel with the load 11 via the fourth connection means 13, and the other is connected to the ground ground 12.
　次に、実施の形態２の蓄電装置の動作を説明する。 Next, the operation of the power storage device of the second embodiment will be described.
　負荷１１へ印加される電圧源が、第１蓄電デバイス６から第２蓄電デバイス７に変化する際、あるいは第２蓄電デバイス７から第１蓄電デバイス６に変化する際、第１蓄電デバイス６からも第２蓄電デバイス７からも電圧が印加されない期間でも、蓄電素子１４が、負荷１１に電圧を供給するので、負荷１１の電圧源が失われることはない。 When the voltage source applied to the load 11 changes from the first power storage device 6 to the second power storage device 7, or when the voltage source changes from the second power storage device 7 to the first power storage device 6, the first power storage device 6 also Even during a period in which no voltage is applied from the second power storage device 7, the power storage element 14 supplies a voltage to the load 11, so that the voltage source of the load 11 is not lost.
　以上のように、実施の形態２によれば、負荷１１への電圧印加を、第１蓄電デバイス６、第２蓄電デバイス７の間で切り換えても、負荷１１への電源電圧の瞬断を防止することができる。 As described above, according to the second embodiment, even when the voltage application to the load 11 is switched between the first power storage device 6 and the second power storage device 7, the power supply voltage to the load 11 is prevented from being momentarily interrupted. can do.
　（実施の形態３）
　以下、本発明の実施の形態３における蓄電装置について図面を参照しながら説明する。 (Embodiment 3)
Hereinafter, the power storage device according to Embodiment 3 of the present invention will be described with reference to the drawings.
　図４および図５は、本発明の実施の形態３に係る蓄電装置のブロック図である。なお、実施の形態１と同様の構成を有するものについては、同一符号を付しその説明を省略し、相違点について詳述する。 4 and 5 are block diagrams of the power storage device according to Embodiment 3 of the present invention. In addition, about what has the structure similar to Embodiment 1, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and a difference is explained in full detail.
　図４において実施の形態１と相違する点は、第１蓄電デバイス６および第２蓄電デバイス７を並列に接続して負荷１１へ電力を供給する点である。 4 is different from the first embodiment in that the first power storage device 6 and the second power storage device 7 are connected in parallel to supply power to the load 11.
　また、図５において実施の形態１と相違する点は、第１蓄電デバイス６および第２蓄電デバイス７を並列に接続し、第１接続手段１から充電する点である。以下詳述する。 5 is different from the first embodiment in that the first power storage device 6 and the second power storage device 7 are connected in parallel and charged from the first connection means 1. This will be described in detail below.
　図４および図５におけるＥＣＵ８は、第１接続切換手段２、第２接続切換手段３、第３接続切換手段４、第４接続切換手段５の切り換えを制御する。 4 and 5, the ECU 8 controls switching of the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, and the fourth connection switching means 5.
　具体的には、ＥＣＵ８は、第１蓄電デバイス６、および、第２蓄電デバイス７を放電する際には、第１接続切換手段２の他方を負荷１１に接続し、かつ、第２接続切換手段３の他方をグランド接地１２に接続し、かつ、第３接続切換手段４の他方を負荷１１に接続すると共に、第４接続切換手段５の他方をグランド接地１２に接続するように制御する。 Specifically, when discharging the first power storage device 6 and the second power storage device 7, the ECU 8 connects the other of the first connection switching means 2 to the load 11, and the second connection switching means. The other of the third connection switching means 4 is connected to the load 11, and the other of the fourth connection switching means 5 is connected to the ground ground 12.
　また、ＥＣＵ８は、第１蓄電デバイス６、および、第２蓄電デバイス７を充電する際には、第１接続切換手段２の他方を第１接続手段１に接続し、かつ、第２接続切換手段３の他方をグランド接地１２に接続し、かつ、第３接続切換手段４の他方を第１接続手段１に接続すると共に、第４接続切換手段５の他方をグランド接地１２に接続するように制御する。 Further, when charging the first power storage device 6 and the second power storage device 7, the ECU 8 connects the other of the first connection switching means 2 to the first connection means 1, and the second connection switching means. And the other of the third connection switching means 4 is connected to the first connection means 1 and the other of the fourth connection switching means 5 is connected to the ground ground 12. To do.
　以上のように、実施の形態３によれば、複数の蓄電デバイスの充放電状態に応じて蓄電デバイスを切り換えることで、第１蓄電デバイス６、および、第２蓄電デバイス７を並列接続した状態で、負荷１１に電力供給する、または、充電を切り換えることができる。 As described above, according to Embodiment 3, the first power storage device 6 and the second power storage device 7 are connected in parallel by switching the power storage devices according to the charge / discharge states of the plurality of power storage devices. It is possible to supply power to the load 11 or switch charging.
　（実施の形態４）
　以下、本発明の実施の形態４における蓄電装置について図面を参照しながら説明する。 (Embodiment 4)
Hereinafter, a power storage device according to Embodiment 4 of the present invention will be described with reference to the drawings.
　図６および図７は、本発明の実施の形態４に係る蓄電装置のブロック図である。なお、実施の形態１と同様の構成を有するものについては、同一符号を付しその説明を省略し、相違点について詳述する。 6 and 7 are block diagrams of the power storage device according to Embodiment 4 of the present invention. In addition, about what has the structure similar to Embodiment 1, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and a difference is explained in full detail.
　図６において実施の形態１と相違する点は、第１蓄電デバイス６は充電を行い、第２蓄電デバイス７が負荷１１へ電力を供給する点である。 6 is different from the first embodiment in that the first power storage device 6 is charged and the second power storage device 7 supplies power to the load 11.
　また、図７において実施の形態１と相違する点は、第２蓄電デバイス７は充電を行い、第１蓄電デバイス６が負荷１１へ電力を供給する点である。以下詳述する。 7 is different from the first embodiment in that the second power storage device 7 is charged and the first power storage device 6 supplies power to the load 11. This will be described in detail below.
　図６および図７におけるＥＣＵ８は、第１接続切換手段２、第２接続切換手段３、第３接続切換手段４、第４接続切換手段５の切り換えを制御する。 6 and 7 controls the switching of the first connection switching means 2, the second connection switching means 3, the third connection switching means 4, and the fourth connection switching means 5.
　具体的には、ＥＣＵ８は、第２蓄電デバイス７の高圧側端子の電圧が第１蓄電デバイス６の高圧側端子の電圧よりも大きい場合、第１接続切換手段２の他方を第１接続手段１に接続し、かつ、第２接続切換手段３の他方をグランド接地１２に接続し、かつ、第３接続切換手段４の他方を負荷１１に接続すると共に、第４接続切換手段５の他方をグランド接地１２に接続するように制御する。 Specifically, when the voltage at the high voltage side terminal of the second power storage device 7 is higher than the voltage at the high voltage side terminal of the first power storage device 6, the ECU 8 changes the other of the first connection switching means 2 to the first connection means 1. And the other of the second connection switching means 3 is connected to the ground ground 12, the other of the third connection switching means 4 is connected to the load 11, and the other of the fourth connection switching means 5 is connected to the ground. Control to connect to ground 12.
　また、ＥＣＵ８は、第１蓄電デバイス６の高圧側端子の電圧が第２蓄電デバイス７の高圧側端子の電圧よりも大きい場合、第１接続切換手段２の他方を負荷１１に接続し、かつ、第２接続切換手段３の他方をグランド接地１２に接続し、かつ、第３接続切換手段４の他方を第１接続手段１に接続すると共に、第４接続切換手段５の他方をグランド接地１２に接続するように制御する。 Further, the ECU 8 connects the other of the first connection switching means 2 to the load 11 when the voltage of the high voltage side terminal of the first power storage device 6 is larger than the voltage of the high voltage side terminal of the second power storage device 7, and The other of the second connection switching means 3 is connected to the ground ground 12, the other of the third connection switching means 4 is connected to the first connection means 1, and the other of the fourth connection switching means 5 is connected to the ground ground 12. Control to connect.
　以上のように、実施の形態４によれば、複数の蓄電デバイスの充放電状態に応じて蓄電デバイスを切り換えることで、第１蓄電デバイス６、および、第２蓄電デバイス７の蓄電量の多い方から負荷１１に電力供給をすると同時に、第１蓄電デバイス６、および、第２蓄電デバイス７の蓄電量の少ない方を充電することができる。 As described above, according to the fourth embodiment, the power storage amount of the first power storage device 6 and the second power storage device 7 is larger by switching the power storage devices according to the charge / discharge states of the plurality of power storage devices. At the same time as supplying power to the load 11, the first power storage device 6 and the second power storage device 7 with the smaller amount of power storage can be charged.
　２０１０年２月１日出願の特願２０１０－０２００６３の日本出願に含まれる明細書、図面および要約書の開示内容は、すべて本願に援用される。 The entire disclosure of the specification, drawings and abstract contained in the Japanese application of Japanese Patent Application No. 2010-020063 filed on February 1, 2010 is incorporated herein by reference.
　本発明は、自動車などに設けられている二次電池等の複数の蓄電デバイスを有する蓄電装置に好適である。 The present invention is suitable for a power storage device having a plurality of power storage devices such as a secondary battery provided in an automobile or the like.
１　第１接続手段
２　第１接続切換手段
３　第２接続切換手段
４　第３接続切換手段
５　第４接続切換手段
６　第１蓄電デバイス
７　第２蓄電デバイス
８　ＥＣＵ
１１　負荷
１４　蓄電素子 DESCRIPTION OF SYMBOLS 1 1st connection means 2 1st connection switching means 3 2nd connection switching means 4 3rd connection switching means 5 4th connection switching means 6 1st electrical storage device 7 2nd electrical storage device 8 ECU
11 Load 14 Storage element

Claims (4)

  1. 　第１蓄電デバイスと、
    　第２蓄電デバイスと、
    　接続先の一方が前記第１蓄電デバイスの高圧側端子に接続され、前記接続先の他方が電源供給を行う接続手段または負荷のいずれか一方に切替接続される第１接続切換手段と、
    　接続先の一方が前記第１蓄電デバイスの低圧側端子に接続され、前記接続先の他方が前記負荷またはグランド接地のいずれか一方に切替接続される第２接続切換手段と、
    　接続先の一方が前記第２蓄電デバイスの高圧側端子に接続され、前記接続先の他方が前記負荷または前記接続手段のいずれか一方に切替接続される第３接続切換手段と、
    　接続先の一方が前記第２蓄電デバイスの低圧側端子に接続され、前記接続先の他方が前記グランド接地または前記負荷のいずれか一方に切替接続される第４接続切換手段と、
    　前記第１蓄電デバイス、前記第２蓄電デバイス、前記第１接続切換手段、前記第２接続切換手段、前記第３接続切換手段、および、前記第４接続切換手段に接続されるＥＣＵと、を備え、
    　前記ＥＣＵは、
    　前記第１蓄電デバイスの第１電圧状態および前記第２蓄電デバイスの第２電圧状態を監視し、
    　前記第１電圧状態と前記第２電圧状態との間に一定以上の電位差がある場合、前記第１接続切換手段の他方の接続先を前記負荷に接続し、前記第２接続切換手段の他方の接続先を前記グランド接地に接続し、前記第３接続切換手段の他方の接続先を前記接続手段に接続し、かつ、前記第４接続切換手段の他方の接続先を前記負荷に接続して、前記負荷に対する電圧印加を前記第１蓄電デバイスと前記第２蓄電デバイスとから交互に切り替えて供給させる、
    　蓄電装置。     A first power storage device;
    A second power storage device;
    One of connection destinations is connected to a high-voltage side terminal of the first power storage device, and the other of the connection destinations is connected to one of connection means for supplying power or a load;
    A second connection switching means in which one of the connection destinations is connected to the low-voltage side terminal of the first power storage device, and the other of the connection destinations is switched and connected to either the load or the ground;
    A third connection switching means in which one of the connection destinations is connected to the high-voltage side terminal of the second power storage device, and the other of the connection destinations is switched and connected to either the load or the connection means;
    A fourth connection switching means, wherein one of the connection destinations is connected to the low-voltage side terminal of the second power storage device, and the other of the connection destinations is switched and connected to either the ground ground or the load;
    An ECU connected to the first power storage device, the second power storage device, the first connection switching means, the second connection switching means, the third connection switching means, and the fourth connection switching means. ,
    The ECU
    Monitoring a first voltage state of the first power storage device and a second voltage state of the second power storage device;
    When there is a certain potential difference between the first voltage state and the second voltage state, the other connection destination of the first connection switching means is connected to the load, and the other connection point of the second connection switching means is connected. Connecting the connection destination to the ground, connecting the other connection destination of the third connection switching means to the connection means, and connecting the other connection destination of the fourth connection switching means to the load; The voltage application to the load is alternately switched from the first power storage device and the second power storage device to be supplied.
    Power storage device.
  2. 　前記負荷に並列接続された蓄電素子、をさらに備え、
    　前記負荷に対する前記電圧印加が前記第１蓄電デバイスと前記第２蓄電デバイスとから交互に切り替えて供給されるときでも、前記蓄電素子が前記負荷へ電源電圧を供給する、
    　請求項１記載の蓄電装置。     A power storage device connected in parallel to the load,
    Even when the voltage application to the load is alternately supplied from the first power storage device and the second power storage device, the power storage element supplies a power supply voltage to the load.
    The power storage device according to claim 1.
  3. 　第１蓄電デバイスと、
    　第２蓄電デバイスと、
    　接続先の一方が前記第１蓄電デバイスの高圧側端子に接続され、前記接続先の他方が電源供給を行う接続手段または負荷のいずれか一方に切替接続される第１接続切換手段と、
    　接続先の一方が前記第１蓄電デバイスの低圧側端子に接続され、前記接続先の他方が前記負荷またはグランド接地のいずれか一方に切替接続される第２接続切換手段と、
    　接続先の一方が前記第２蓄電デバイスの高圧側端子に接続され、前記接続先の他方が前記負荷または前記接続手段のいずれか一方に切替接続される第３接続切換手段と、
    　接続先の一方が前記第２蓄電デバイスの低圧側端子に接続され、前記接続先の他方が前記グランド接地または前記負荷のいずれか一方に切替接続される第４接続切換手段と、
    　前記第１蓄電デバイス、前記第２蓄電デバイス、前記第１接続切換手段、前記第２接続切換手段、前記第３接続切換手段、および、前記第４接続切換手段に接続されるＥＣＵと、を備え、
    　前記ＥＣＵは、
    　前記第１蓄電デバイスおよび前記第２蓄電デバイスを放電する場合、前記第１接続切換手段の他方の接続先を前記負荷に接続し、前記第２接続切換手段の他方の接続先を前記グランド接地に接続し、前記第３接続切換手段の他方の接続先を前記負荷に接続し、かつ、前記第４接続切換手段の他方の接続先を前記グランド接地に接続し、
    　前記第１蓄電デバイスおよび前記第２蓄電デバイスを充電する場合、前記第１接続切換手段の他方の接続先を前記接続手段に接続し、前記第２接続切換手段の他方の接続先を前記グランド接地に接続し、前記第３接続切換手段の他方の接続先を前記接続手段に接続し、かつ、前記第４接続切換手段の他方の接続先を前記グランド接地に接続する、
    　蓄電装置。     A first power storage device;
    A second power storage device;
    One of connection destinations is connected to a high-voltage side terminal of the first power storage device, and the other of the connection destinations is connected to one of connection means for supplying power or a load;
    A second connection switching means in which one of the connection destinations is connected to the low-voltage side terminal of the first power storage device, and the other of the connection destinations is switched and connected to either the load or the ground;
    A third connection switching means in which one of the connection destinations is connected to the high-voltage side terminal of the second power storage device, and the other of the connection destinations is switched and connected to either the load or the connection means;
    A fourth connection switching means, wherein one of the connection destinations is connected to the low-voltage side terminal of the second power storage device, and the other of the connection destinations is switched and connected to either the ground ground or the load;
    An ECU connected to the first power storage device, the second power storage device, the first connection switching means, the second connection switching means, the third connection switching means, and the fourth connection switching means. ,
    The ECU
    When discharging the first power storage device and the second power storage device, the other connection destination of the first connection switching means is connected to the load, and the other connection destination of the second connection switching means is connected to the ground. Connecting, connecting the other connection destination of the third connection switching means to the load, and connecting the other connection destination of the fourth connection switching means to the ground,
    When charging the first power storage device and the second power storage device, the other connection destination of the first connection switching means is connected to the connection means, and the other connection destination of the second connection switching means is connected to the ground. Connecting the other connection destination of the third connection switching means to the connection means, and connecting the other connection destination of the fourth connection switching means to the ground.
    Power storage device.
  4. 　第１蓄電デバイスと、
    　第２蓄電デバイスと、
    　接続先の一方が前記第１蓄電デバイスの高圧側端子に接続され、前記接続先の他方が電源供給を行う接続手段または負荷のいずれか一方に切替接続される第１接続切換手段と、
    　接続先の一方が前記第１蓄電デバイスの低圧側端子に接続され、前記接続先の他方が前記負荷またはグランド接地のいずれか一方に切替接続される第２接続切換手段と、
    　接続先の一方が前記第２蓄電デバイスの高圧側端子に接続され、前記接続先の他方が前記負荷または前記接続手段のいずれか一方に切替接続される第３接続切換手段と、
    　接続先の一方が前記第２蓄電デバイスの低圧側端子に接続され、前記接続先の他方が前記グランド接地または前記負荷のいずれか一方に切替接続される第４接続切換手段と、
    　前記第１蓄電デバイス、前記第２蓄電デバイス、前記第１接続切換手段、前記第２接続切換手段、前記第３接続切換手段、および、前記第４接続切換手段に接続されるＥＣＵと、を備え、
    　前記ＥＣＵは、
    　前記第２蓄電デバイスの高圧側端子の電圧が前記第１蓄電デバイスの高圧側端子の電圧よりも大きい場合、前記第１接続切換手段の他方の接続先を前記接続手段に接続し、前記第２接続切換手段の他方の接続先を前記グランド接地に接続し、前記第３接続切換手段の他方の接続先を前記負荷に接続し、かつ、前記第４接続切換手段の他方の接続先を前記グランド接地に接続し、
    　前記第１蓄電デバイスの高圧側端子の電圧が前記第２蓄電デバイスの高圧側端子の電圧よりも大きい場合、前記第１蓄電デバイスおよび前記第２蓄電デバイスを充電する際に、前記第１接続切換手段の他方の接続先を前記負荷に接続し、前記第２接続切換手段の他方の接続先を前記グランド接地に接続し、前記第３接続切換手段の他方の接続先を前記接続手段に接続し、かつ、前記第４接続切換手段の他方の接続先を前記グランド接地に接続する、
    　蓄電装置。
     
          A first power storage device;
    A second power storage device;
    One of connection destinations is connected to a high-voltage side terminal of the first power storage device, and the other of the connection destinations is connected to one of connection means for supplying power or a load;
    A second connection switching means in which one of the connection destinations is connected to the low-voltage side terminal of the first power storage device, and the other of the connection destinations is switched and connected to either the load or the ground;
    A third connection switching means in which one of the connection destinations is connected to the high-voltage side terminal of the second power storage device, and the other of the connection destinations is switched and connected to either the load or the connection means;
    A fourth connection switching means, wherein one of the connection destinations is connected to the low-voltage side terminal of the second power storage device, and the other of the connection destinations is switched and connected to either the ground ground or the load;
    An ECU connected to the first power storage device, the second power storage device, the first connection switching means, the second connection switching means, the third connection switching means, and the fourth connection switching means. ,
    The ECU
    When the voltage of the high voltage side terminal of the second power storage device is larger than the voltage of the high voltage side terminal of the first power storage device, the other connection destination of the first connection switching unit is connected to the connection unit, and the second The other connection destination of the connection switching means is connected to the ground, the other connection destination of the third connection switching means is connected to the load, and the other connection destination of the fourth connection switching means is connected to the ground. Connect to ground,
    When the voltage of the high voltage side terminal of the first power storage device is larger than the voltage of the high voltage side terminal of the second power storage device, the first connection switching is performed when charging the first power storage device and the second power storage device. The other connection destination of the means is connected to the load, the other connection destination of the second connection switching means is connected to the ground, and the other connection destination of the third connection switching means is connected to the connection means. And the other connection destination of the fourth connection switching means is connected to the ground.
    Power storage device.

PCT/JP2011/000546 2010-02-01 2011-02-01 Electric storage apparatus WO2011093110A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0360336A (en) * 1989-07-26 1991-03-15 Komatsu Forklift Co Ltd Battery load connecting device
JPH10334951A (en) * 1997-05-30 1998-12-18 Toyota Motor Corp Lithium ion secondary battery
WO2007100035A1 (en) * 2006-03-03 2007-09-07 Nec Corporation Power supply system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0360336A (en) * 1989-07-26 1991-03-15 Komatsu Forklift Co Ltd Battery load connecting device
JPH10334951A (en) * 1997-05-30 1998-12-18 Toyota Motor Corp Lithium ion secondary battery
WO2007100035A1 (en) * 2006-03-03 2007-09-07 Nec Corporation Power supply system

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