JP5888187B2 - Battery system and battery - Google Patents

Battery system and battery Download PDF

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JP5888187B2
JP5888187B2 JP2012188751A JP2012188751A JP5888187B2 JP 5888187 B2 JP5888187 B2 JP 5888187B2 JP 2012188751 A JP2012188751 A JP 2012188751A JP 2012188751 A JP2012188751 A JP 2012188751A JP 5888187 B2 JP5888187 B2 JP 5888187B2
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battery
side connector
vehicle
connection detection
detection terminal
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JP2014050138A (en
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西垣　研治
研治 西垣
守 倉石
守 倉石
鈴木　恒雄
恒雄 鈴木
悟士 山本
悟士 山本
洋明 加藤
洋明 加藤
利成 深津
利成 深津
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Toyota Industries Corp
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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
    • 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

Description

本発明は、互いに並列接続される複数の組電池を備えるバッテリを車両に搭載するためのバッテリシステム及びそのバッテリに関する。   The present invention relates to a battery system for mounting a battery including a plurality of assembled batteries connected in parallel to each other on a vehicle, and the battery.

複数の充電可能な二次電池を直列に接続して組電池とし高電圧のバッテリを実現する技術が実用化されている。この種のバッテリは、近年では、例えば、電動フォークリフト、ハイブリッド車、又は電気自動車などの車両への実装において注目されている。また、この種のバッテリは、負荷への安定した電力供給のために複数の組電池を互いに並列接続させているものもある。   A technology for realizing a high-voltage battery by connecting a plurality of rechargeable secondary batteries in series to form an assembled battery has been put into practical use. In recent years, this type of battery has attracted attention in mounting on vehicles such as electric forklifts, hybrid vehicles, and electric vehicles. Some of these types of batteries have a plurality of assembled batteries connected in parallel to each other for stable power supply to a load.

ところが、互いに並列接続される複数の組電池を備えるバッテリは、走行用モータの力行時の放電と走行用モータの回生時の充電とが繰り返されることにより、各組電池の電圧が不均一になることがある。そして、各組電池の電圧の不均一は、組電池間を流れる還流電流によるバッテリの発熱の要因になるおそれがある。   However, in a battery including a plurality of assembled batteries connected in parallel to each other, the voltage of each assembled battery becomes non-uniform due to repeated discharge during power running of the traveling motor and charging during regeneration of the traveling motor. Sometimes. And the nonuniformity of the voltage of each assembled battery may become a factor of the heat_generation | fever of a battery by the return current which flows between assembled batteries.

そこで、バッテリの発熱を監視するための機能をバッテリに付加することが考えられる（例えば、特許文献１参照）。   Thus, it is conceivable to add a function for monitoring the heat generation of the battery to the battery (for example, see Patent Document 1).

特開２０１１−１０８５３６号公報JP 2011-108536 A

しかしながら、バッテリを監視するための機能をバッテリに付加する場合、その機能を駆動するための電力をバッテリからまかなう必要があり、バッテリの不使用時もバッテリの電力が消費されてしまう。 However, when adding a function for monitoring the battery to the battery, it is necessary to cover the power for driving the function from the battery, when not in use the battery also power of the battery is consumed.

本発明は、組電池を備えるバッテリの不使用時において、バッテリの消費電力を抑えることを目的とする。 The present invention, at the time of non-use of a battery with a battery pack, and an object thereof is to reduce power consumption of the battery.

本発明のバッテリシステムは、車両とバッテリとを備える。
前記車両は、負荷に接続される車両側電力端子と、車両側コネクタ接続検出端子とを有する車両側コネクタを備える。 The battery system of the present invention includes a vehicle and a battery.
The vehicle includes a vehicle-side connector having a vehicle-side power terminal connected to a load and a vehicle-side connector connection detection terminal.

前記バッテリは、組電池と、スイッチと、バッテリ側コネクタと、スイッチ制御部とコネクタ接続判断部と異常判断部とを有する電池制御部とを備える。
前記バッテリ側コネクタは、前記スイッチを介して前記組電池に接続されるバッテリ側電力端子と、バッテリ側コネクタ接続検出端子とを有し、前記車両側コネクタに接続されると、前記車両側電力端子及び前記バッテリ側電力端子が互いに接続されるとともに前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続される。 The battery includes an assembled battery, a switch, a battery-side connector, a battery control unit having a switch control unit, a connector connection determination unit, and an abnormality determination unit.
The battery-side connector has a battery-side power terminal connected to the assembled battery via the switch, and a battery-side connector connection detection terminal. When the battery-side connector is connected to the vehicle-side connector, the vehicle-side power terminal The battery-side power terminal is connected to each other, and the vehicle-side connector connection detection terminal and the battery-side connector connection detection terminal are connected to each other.

前記電池制御部は、前記組電池に並列接続される。
前記スイッチ制御部は、スリープ状態から起動状態に移行すると、前記スイッチをオフからオンに切り替えさせる。 The battery control unit is connected in parallel to the assembled battery.
When the switch control unit shifts from the sleep state to the activation state, the switch control unit switches the switch from off to on.

前記コネクタ接続判断部は、前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続されることにより、入力される電圧が変化すると、前記バッテリ側コネクタが前記車両側コネクタに接続されたと判断し、前記スイッチ制御部をスリープ状態から起動状態に移行させる。   The connector connection determining unit connects the battery-side connector to the vehicle-side connector when the input voltage changes due to the vehicle-side connector connection detection terminal and the battery-side connector connection detection terminal being connected to each other. The switch control unit is shifted from the sleep state to the activated state.

前記異常判断部は、前記組電池の異常を判断する。
これにより、バッテリ側コネクタが車両側コネクタに接続されていないとき、スイッチ制御部をスリープ状態にしているため、バッテリの不使用時において組電池からスイッチ制御部へ供給される電力を抑えることができ、バッテリの不使用時におけるバッテリの消費電力を抑えることができる。 The abnormality determination unit determines an abnormality of the assembled battery.
Thereby, when the battery-side connector is not connected to the vehicle-side connector, the switch control unit is in the sleep state, so that the power supplied from the assembled battery to the switch control unit when the battery is not used can be suppressed. The power consumption of the battery can be suppressed when the battery is not used.

本発明によれば、組電池を備えるバッテリの不使用時において、バッテリの消費電力を抑えることができる。 According to the present invention, at the time of non-use of a battery with a battery pack, it is possible to suppress the power consumption of the battery.

本発明の実施形態のバッテリシステムを示す図である。It is a figure which shows the battery system of embodiment of this invention. 電池ＥＣＵの動作を示すフローチャートである。It is a flowchart which shows operation | movement of battery ECU.

図１は、本発明の実施形態のバッテリシステムを示す図である。
図１に示すバッテリシステム１は、電動フォークリフト、ハイブリッド車、又は電気自動車などの車両２と、その車両２に搭載されるバッテリ（電池パック）３とを備えて構成される。 FIG. 1 is a diagram illustrating a battery system according to an embodiment of the present invention.
A battery system 1 shown in FIG. 1 includes a vehicle 2 such as an electric forklift, a hybrid vehicle, or an electric vehicle, and a battery (battery pack) 3 mounted on the vehicle 2.

車両２は、車両側コネクタ２１と、インバータ回路２２（負荷）と、補機２３（負荷）と、走行制御ＥＣＵ２４（負荷）とを備える。
車両側コネクタ２１は、車両側電力端子Ｐｖと、車両側電力端子ＧＮＤｖと、車両側通信端子ＣＡＮＨｖと、車両側通信端子ＣＡＮＬｖと、車両側通信端子ＣＡＮＧｖと、車両側コネクタ接続検出端子Ｃｖとを有する。なお、車両側コネクタ接続検出端子Ｃｖは車両側通信端子ＣＡＮＧｖに接続されている。 The vehicle 2 includes a vehicle-side connector 21, an inverter circuit 22 (load), an auxiliary machine 23 (load), and a travel control ECU 24 (load).
The vehicle side connector 21 includes a vehicle side power terminal Pv, a vehicle side power terminal GNDv, a vehicle side communication terminal CANHv, a vehicle side communication terminal CANLv, a vehicle side communication terminal CANGv, and a vehicle side connector connection detection terminal Cv. Have. The vehicle-side connector connection detection terminal Cv is connected to the vehicle-side communication terminal CANGv.

インバータ回路２２は、車両側コネクタ２１の車両側電力端子Ｐｖ、ＧＮＤｖを介してバッテリ３から供給される直流電力を交流電力に変換して不図示の走行用モータを駆動する。   The inverter circuit 22 converts DC power supplied from the battery 3 via the vehicle-side power terminals Pv and GNDv of the vehicle-side connector 21 into AC power and drives a travel motor (not shown).

補機２３は、例えば、照明やヒーターなどの電装機器であって、車両側コネクタ２１の車両側電力端子Ｐｖ、ＧＮＤｖを介してバッテリ３から供給される直流電力により駆動する。   The auxiliary machine 23 is, for example, an electrical device such as an illumination or a heater, and is driven by DC power supplied from the battery 3 via the vehicle-side power terminals Pv and GNDv of the vehicle-side connector 21.

走行制御ＥＣＵ２４は、車両側コネクタ２１の車両側電力端子Ｐｖ、ＧＮＤｖを介してバッテリ３から供給される直流電力により駆動する。また、走行制御ＥＣＵ２４は、ユーザによるアクセルペダルやブレーキペダルの操作に応じた制御信号に基づいてインバータ回路２２の動作を制御することにより車両２の発進、加速、減速などの走行に関する制御を行う。また、走行制御ＥＣＵ２４は、ＣＡＮ通信部２４１を備える。なお、ＣＡＮ通信部２４１は、車両側コネクタ２１の車両側通信端子ＣＡＮＨｖ、ＣＡＮＬｖ、ＣＡＮＧｖに接続されている。   The travel control ECU 24 is driven by DC power supplied from the battery 3 via the vehicle-side power terminals Pv and GNDv of the vehicle-side connector 21. Further, the travel control ECU 24 controls the travel of the vehicle 2 such as start, acceleration, and deceleration by controlling the operation of the inverter circuit 22 based on a control signal corresponding to the operation of the accelerator pedal and the brake pedal by the user. The travel control ECU 24 includes a CAN communication unit 241. The CAN communication unit 241 is connected to the vehicle side communication terminals CANHv, CANLv, and CANGv of the vehicle side connector 21.

バッテリ３は、バッテリ側コネクタ３１と、３つの組電池３２−１〜３２−３と、４つのスイッチ３３−１〜３３−４と、３つの電圧センサ３４−１〜３４−３と、電池ＥＣＵ３５とを備える。なお、互いに並列接続される組電池の数は３つに限定されない。また、バッテリ３は、１つの組電池により構成されてもよい。   The battery 3 includes a battery-side connector 31, three assembled batteries 32-1 to 32-3, four switches 33-1 to 33-4, three voltage sensors 34-1 to 34-3, and a battery ECU 35. With. The number of battery packs connected in parallel to each other is not limited to three. Moreover, the battery 3 may be comprised by one assembled battery.

バッテリ側コネクタ３１は、バッテリ側電力端子Ｐｂと、バッテリ側電力端子ＧＮＤｂと、バッテリ側通信端子ＣＡＮＨｂと、バッテリ側通信端子ＣＡＮＬｂと、バッテリ側通信端子ＣＡＮＧｂと、バッテリ側コネクタ接続検出端子Ｃｂとを有する。なお、バッテリ側電力端子ＧＮＤｂは、組電池３２−１〜３２−３のそれぞれのマイナス端子に接続されている。例えば、ユーザによりバッテリ３が車両２に搭載されバッテリ側コネクタ３１が車両側コネクタ２１に接続されると、バッテリ側電力端子Ｐｂと車両側電力端子Ｐｖ、バッテリ側電力端子ＧＮＤｂと車両側電力端子ＧＮＤｖ、バッテリ側通信端子ＣＡＮＨｂと車両側通信端子ＣＡＮＨｖ、バッテリ側通信端子ＣＡＮＬｂと車両側通信端子ＣＡＮＬｖ、バッテリ側通信端子ＣＡＮＧｂと車両側通信端子ＣＡＮＧｖ、バッテリ側コネクタ接続検出端子Ｃｂと車両側コネクタ接続検出端子Ｃｖとが互いに接続される。   The battery side connector 31 includes a battery side power terminal Pb, a battery side power terminal GNDb, a battery side communication terminal CANHb, a battery side communication terminal CANLb, a battery side communication terminal CANGb, and a battery side connector connection detection terminal Cb. Have. The battery side power terminal GNDb is connected to each minus terminal of the assembled batteries 32-1 to 32-3. For example, when the battery 3 is mounted on the vehicle 2 and the battery-side connector 31 is connected to the vehicle-side connector 21 by the user, the battery-side power terminal Pb and the vehicle-side power terminal Pv, the battery-side power terminal GNDb, and the vehicle-side power terminal GNDv. , Battery side communication terminal CANHb and vehicle side communication terminal CANHv, battery side communication terminal CANLb and vehicle side communication terminal CANLv, battery side communication terminal CANGb and vehicle side communication terminal CANGv, battery side connector connection detection terminal Cb and vehicle side connector connection detection Terminal Cv is connected to each other.

組電池３２−１〜３２−３は、それぞれ、複数の二次電池（例えば、リチウムイオン二次電池など）が直列接続されて構成されている。なお、組電池３２−１〜３２−３は、それぞれ、１つの二次電池から構成されてもよい。   Each of the assembled batteries 32-1 to 32-3 is configured by connecting a plurality of secondary batteries (for example, lithium ion secondary batteries) in series. In addition, each of the assembled batteries 32-1 to 32-3 may be configured by one secondary battery.

スイッチ３３−１〜３３−４は、それぞれ、例えば、電磁式リレーなどにより構成されている。スイッチ３３−１の一方端はスイッチ３３−２、３３−３のそれぞれの一方端に接続され、スイッチ３３−１の他方端は組電池３２−１のプラス端子に接続されている。また、スイッチ３３−２の他方端は組電池３２−２のプラス端子に接続され、スイッチ３３−３の他方端は組電池３２−３のプラス端子に接続されている。また、組電池３２−１〜３２−３のそれぞれのマイナス端子は互いに接続されている。また、スイッチ３３−４の一方端はバッテリ側電力端子Ｐｂに接続され、スイッチ３３−４の他方端はスイッチ３３−１〜３３−３のそれぞれの一方端に接続されている。なお、スイッチ３３−４は省略してもよい。また、スイッチ３３−１〜３３−３は組電池３２−１〜３２−３のマイナス端子側に直列接続されてもよい。また、バッテリ３を１つの組電池で構成する場合、例えば、その組電池とバッテリ側電力端子Ｐｂとがスイッチ３３−４を介して接続されるものとする。   Each of the switches 33-1 to 33-4 is configured by, for example, an electromagnetic relay. One end of the switch 33-1 is connected to one end of each of the switches 33-2 and 33-3, and the other end of the switch 33-1 is connected to the plus terminal of the assembled battery 32-1. The other end of the switch 33-2 is connected to the plus terminal of the assembled battery 32-2, and the other end of the switch 33-3 is connected to the plus terminal of the assembled battery 32-3. The minus terminals of the assembled batteries 32-1 to 32-3 are connected to each other. Further, one end of the switch 33-4 is connected to the battery side power terminal Pb, and the other end of the switch 33-4 is connected to one end of each of the switches 33-1 to 33-3. The switch 33-4 may be omitted. Further, the switches 33-1 to 33-3 may be connected in series to the minus terminal side of the assembled batteries 32-1 to 32-3. Moreover, when the battery 3 is comprised with one assembled battery, the assembled battery and the battery side electric power terminal Pb shall be connected via switch 33-4, for example.

電圧センサ３４−１は組電池３２−１全体の電圧Ｖ１を検出し、電圧センサ３４−２は組電池３２−２全体の電圧Ｖ２を検出し、電圧センサ３４−３は組電池３２−３全体の電圧Ｖ３を検出する。なお、組電池を構成する複数の２次電池それぞれの電圧を検出することで、組電池全体の電圧Ｖ１、Ｖ２、Ｖ３を検出してもよい。   The voltage sensor 34-1 detects the voltage V1 of the entire assembled battery 32-1, the voltage sensor 34-2 detects the voltage V2 of the entire assembled battery 32-2, and the voltage sensor 34-3 is the entire assembled battery 32-3. The voltage V3 is detected. In addition, you may detect the voltage V1, V2, V3 of the whole assembled battery by detecting each voltage of the some secondary battery which comprises an assembled battery.

電池ＥＣＵ３５（電池制御部）は、スイッチ制御部３５１と、異常判断部３５２（監視ＥＣＵ）と、ＣＡＮ通信部３５３と、コネクタ接続判断部３５４とを備える。なお、電池ＥＣＵ３５は、常に組電池（組電池３２−１〜３２−３のうちの少なくとも１つ）から電力を供給されている。即ち、電池ＥＣＵ３５は、組電池に並列接続され、組電池のプラス端子とマイナス端子に常に接続されている。   The battery ECU 35 (battery control unit) includes a switch control unit 351, an abnormality determination unit 352 (monitoring ECU), a CAN communication unit 353, and a connector connection determination unit 354. The battery ECU 35 is always supplied with power from the assembled battery (at least one of the assembled batteries 32-1 to 32-3). That is, the battery ECU 35 is connected in parallel to the assembled battery, and is always connected to the plus terminal and the minus terminal of the assembled battery.

なお、スイッチ制御部３５１、異常判断部３５２、ＣＡＮ通信部３５３、及びコネクタ接続判断部３５４などは、それぞれ、例えば、ＣＰＵ（Central Processing Unit）又はプログラマブルなデバイス（ＦＰＧＡ（Field Programmable Gate Array）やＰＬＤ（Programmable Logic Device））などにより構成され、電池ＥＣＵ３５内の不図示の記憶部に記憶されているプログラムをＣＰＵ又はプログラマブルなデバイスが読み出して実行することにより、起動状態とスリープ状態（一部の機能が駆動せず起動状態時に消費される電力よりも少ない電力が消費されている状態）の移行制御やスイッチ３３−１〜３３−４のオン、オフ制御を行う。なお、上記記憶部は、電池ＥＣＵ３５の外部に設けられてもよい。   The switch control unit 351, the abnormality determination unit 352, the CAN communication unit 353, the connector connection determination unit 354, and the like are each a CPU (Central Processing Unit) or a programmable device (FPGA (Field Programmable Gate Array) or PLD, for example. (Programmable Logic Device)), etc., and a CPU or a programmable device reads out and executes a program stored in a storage unit (not shown) in the battery ECU 35 to execute a startup state and a sleep state (some functions) Is not driven and less power is consumed than in the start-up state), and on / off control of the switches 33-1 to 33-4 is performed. The storage unit may be provided outside the battery ECU 35.

スイッチ制御部３５１は、スイッチ３３−１〜３３−４のそれぞれのオン、オフを制御する。スイッチ３３−１〜３３−４がそれぞれオフからオンに切り替わると、組電池３２−１〜３２−３が互いに並列接続されるとともに、組電池３２−１〜３２−３のそれぞれのプラス端子がバッテリ側コネクタ３１のバッテリ側電力端子Ｐｂに接続される。そのため、バッテリ側コネクタ３１が車両側コネクタ２１に接続されているとき、スイッチ３３−１〜３３−４がそれぞれオフからオンに切り替わると、組電池３２−１〜３２−３からの直流電力がバッテリ側コネクタ３１及び車両側コネクタ２１を介してインバータ回路２２へ供給される。一方、スイッチ３３−１〜３３−４がそれぞれオンからオフに切り替わると、組電池３２−１〜３２−３が互いに切断されるとともに、組電池３２−１〜３２−３のそれぞれのプラス端子がバッテリ側コネクタ３１のバッテリ側電力端子Ｐｂと切断される。   The switch control unit 351 controls each of the switches 33-1 to 33-4 to be turned on / off. When the switches 33-1 to 33-4 are switched from OFF to ON, the assembled batteries 32-1 to 32-3 are connected in parallel to each other, and the plus terminals of the assembled batteries 32-1 to 32-3 are connected to the battery. Connected to the battery-side power terminal Pb of the side connector 31. Therefore, when the battery-side connector 31 is connected to the vehicle-side connector 21, when the switches 33-1 to 33-4 are switched from OFF to ON, the DC power from the assembled batteries 32-1 to 32-3 is changed to the battery. It is supplied to the inverter circuit 22 via the side connector 31 and the vehicle side connector 21. On the other hand, when the switches 33-1 to 33-4 are switched from on to off, the assembled batteries 32-1 to 32-3 are disconnected from each other, and the plus terminals of the assembled batteries 32-1 to 32-3 are connected to each other. The battery-side connector 31 is disconnected from the battery-side power terminal Pb.

異常判断部３５２は、電圧センサ３４−１〜３４−３により検出される電圧Ｖ１〜Ｖ３に基づいて、組電池３２−１〜３２−３が異常（例えば、過充電やショート）であるか否かを判断する。例えば、異常判断部３５２は、電圧センサ３４−１により検出される電圧Ｖ１が閾値よりも高いとき、組電池３２−１が過充電であると判断し、電圧センサ３４−２により検出される電圧Ｖ２が閾値よりも高いとき、組電池３２−２が過充電であると判断し、電圧センサ３４−３により検出される電圧Ｖ３が閾値よりも高いとき、組電池３２−３が過充電であると判断する。なお、異常判断部３５２は、組電池３２−１〜３２−３の近傍に設けられる不図示の温度センサにより検出される温度が閾値よりも高いとき、組電池３２−１〜３２−３が異常であると判断してもよい。また、異常判断部３５２は、上述したように、常に組電池から電力が供給されているため、スリープ状態のときでも定期的に起動状態になって電圧センサ３４−１〜３４−３により検出される電圧Ｖ１〜Ｖ３や温度センサにより検出される温度などにより組電池３２−１〜３２−３の異常を監視することができる。また、異常判断部３５２は、組電池から供給される電力により常に起動状態になって電圧センサ３４−１〜３４−３により検出される電圧Ｖ１〜Ｖ３や温度センサにより検出される温度などにより組電池３２−１〜３２−３の異常を監視してもよい。   The abnormality determination unit 352 determines whether or not the assembled batteries 32-1 to 32-3 are abnormal (for example, overcharge or short circuit) based on the voltages V1 to V3 detected by the voltage sensors 34-1 to 34-3. Determine whether. For example, the abnormality determination unit 352 determines that the assembled battery 32-1 is overcharged when the voltage V1 detected by the voltage sensor 34-1 is higher than a threshold, and the voltage detected by the voltage sensor 34-2. When V2 is higher than the threshold value, it is determined that the assembled battery 32-2 is overcharged, and when the voltage V3 detected by the voltage sensor 34-3 is higher than the threshold value, the assembled battery 32-3 is overcharged. Judge. The abnormality determination unit 352 determines that the assembled batteries 32-1 to 32-3 are abnormal when the temperature detected by a temperature sensor (not shown) provided in the vicinity of the assembled batteries 32-1 to 32-3 is higher than a threshold value. You may judge that. Further, as described above, since the power is always supplied from the assembled battery, the abnormality determination unit 352 is periodically activated even when in the sleep state, and is detected by the voltage sensors 34-1 to 34-3. The abnormalities of the assembled batteries 32-1 to 32-3 can be monitored by the voltages V1 to V3 and the temperature detected by the temperature sensor. In addition, the abnormality determination unit 352 is always activated by the power supplied from the assembled battery, and is set based on the voltages V1 to V3 detected by the voltage sensors 34-1 to 34-3, the temperature detected by the temperature sensor, and the like. You may monitor the abnormality of the batteries 32-1 to 32-3.

ＣＡＮ通信部３５３は、バッテリ側コネクタ３１が車両側コネクタ２１に接続されているとき、バッテリ側コネクタ３１のバッテリ側通信端子ＣＡＮＨｂ、ＣＡＮＬｂ、ＣＡＮＧｂ及び車両側コネクタ２１の車両側通信端子ＣＡＮＨｖ、ＣＡＮＬｖ、ＣＡＮＧｖを介して車両２のＣＡＮ通信部２４１とＣＡＮ（Controller Area Network）通信を行う。なお、バッテリ側通信端子ＣＡＮＨｂ及び車両側通信端子ＣＡＮＨｖは通信信号が流れる通信線ＣＡＮ−Ｈに接続され、バッテリ側通信端子ＣＡＮＬｂ及び車両側通信端子ＣＡＮＬｖは通信信号の反転信号が流れる通信線ＣＡＮ−Ｌに接続され、バッテリ側通信端子ＣＡＮＧｂ及び車両側通信端子ＣＡＮＧｖはＧＮＤ線に接続されている。   When the battery-side connector 31 is connected to the vehicle-side connector 21, the CAN communication unit 353 is connected to the battery-side communication terminals CANHb, CANLb, CANGb of the battery-side connector 31 and the vehicle-side communication terminals CANHv, CANLv of the vehicle-side connector 21. CAN (Controller Area Network) communication is performed with the CAN communication unit 241 of the vehicle 2 via CANGv. The battery side communication terminal CANHb and the vehicle side communication terminal CANHv are connected to a communication line CAN-H through which a communication signal flows, and the battery side communication terminal CANLb and the vehicle side communication terminal CANLv are through a communication line CAN- through which an inverted signal of the communication signal flows. The battery side communication terminal CANGb and the vehicle side communication terminal CANGv are connected to the GND line.

コネクタ接続判断部３５４は、一定電圧Ｖｃが印加される抵抗３５４１と、抵抗３５４１とバッテリ側コネクタ接続検出端子Ｃｂとの間に接続される抵抗３５４２と、検出部３５４３とを備える。   The connector connection determination unit 354 includes a resistor 3541 to which a constant voltage Vc is applied, a resistor 3542 connected between the resistor 3541 and the battery side connector connection detection terminal Cb, and a detection unit 3543.

検出部３５４３は、抵抗３５４１、３５４２の接続点の電圧Ｖｒｅｆに基づいてバッテリ側コネクタ３１が車両側コネクタ２１に接続されているか否かを判断する。バッテリ側コネクタ３１が車両側コネクタ２１に接続されていないとき、電圧Ｖｒｅｆは一定電圧Ｖｃになる。一方、バッテリ側コネクタ３１が車両側コネクタ２１に接続されると、一定電圧Ｖｃが抵抗３５４１、３５４２により分圧されて電圧Ｖｃｄになる。そのため、バッテリ側コネクタ３１が車両側コネクタ２１に接続されているとき、電圧Ｖｒｅｆは電圧Ｖｃｄになる。例えば、一定電圧Ｖｃが５［Ｖ］、電圧Ｖｃｄが２．５［Ｖ］である場合、バッテリ側コネクタ３１が車両側コネクタ２１に接続されると、電圧Ｖｒｅｆが５［Ｖ］から２．５［Ｖ］に変化する。検出部３５４３は、この電圧Ｖｒｅｆの変化を検出してバッテリ側コネクタ３１が車両側コネクタ２１に接続されたと判断する。なお、検出部３５４３は、例えば、コンパレータなどにより構成され、電圧Ｖｒｅｆが閾値よりも低くなると、バッテリ側コネクタ３１が車両側コネクタ２１に接続されたと判断してもよい。   The detection unit 3543 determines whether or not the battery-side connector 31 is connected to the vehicle-side connector 21 based on the voltage Vref at the connection point of the resistors 3541 and 3542. When the battery side connector 31 is not connected to the vehicle side connector 21, the voltage Vref is a constant voltage Vc. On the other hand, when the battery-side connector 31 is connected to the vehicle-side connector 21, the constant voltage Vc is divided by the resistors 3541 and 3542 to become the voltage Vcd. Therefore, when the battery side connector 31 is connected to the vehicle side connector 21, the voltage Vref becomes the voltage Vcd. For example, when the constant voltage Vc is 5 [V] and the voltage Vcd is 2.5 [V], when the battery-side connector 31 is connected to the vehicle-side connector 21, the voltage Vref is changed from 5 [V] to 2.5. Change to [V]. The detection unit 3543 detects the change in the voltage Vref and determines that the battery-side connector 31 is connected to the vehicle-side connector 21. The detection unit 3543 may be configured by, for example, a comparator, and may determine that the battery-side connector 31 is connected to the vehicle-side connector 21 when the voltage Vref is lower than a threshold value.

図２は、電池ＥＣＵ３５の動作を示すフローチャートである。
まず、検出部３５４３は、バッテリ側コネクタ３１が車両側コネクタ２１に接続されたと判断すると（Ｓ１がＹｅｓ）、起動信号をスイッチ制御部３５１、異常判断部３５２、及びＣＡＮ通信部３５３にそれぞれ出力することによりスイッチ制御部３５１、異常判断部３５２、及びＣＡＮ通信部３５３をそれぞれスリープ状態から起動状態に移行させる（Ｓ２）。 FIG. 2 is a flowchart showing the operation of the battery ECU 35.
First, when the detection unit 3543 determines that the battery-side connector 31 is connected to the vehicle-side connector 21 (S1 is Yes), it outputs an activation signal to the switch control unit 351, the abnormality determination unit 352, and the CAN communication unit 353, respectively. As a result, the switch control unit 351, the abnormality determination unit 352, and the CAN communication unit 353 are each shifted from the sleep state to the activated state (S2).

次に、異常判断部３５２は、起動状態移行後、電圧Ｖ１〜Ｖ３に基づいて組電池３２−１〜３２−３が異常であると判断すると（Ｓ３がＮｏ）、自身を起動状態からスリープ状態に移行するとともにスイッチ制御部３５１及びＣＡＮ通信部３５３にそれぞれスリープ信号を出力することによりスイッチ制御部３５１及びＣＡＮ通信部３５３をそれぞれ起動状態からスリープ状態に移行させる（Ｓ４）。これにより、スイッチ３３−１〜３３−４を初期状態のオフのままにさせることができるため、組電池３２−１〜３２−３の少なくとも１つが異常であるとき、組電池３２−１〜３２−３を使用させないようにすることができる。   Next, when the abnormality determination unit 352 determines that the assembled batteries 32-1 to 32-3 are abnormal based on the voltages V1 to V3 after the transition to the activation state (S3 is No), the abnormality determination unit 352 changes itself from the activation state to the sleep state. And a sleep signal is output to the switch control unit 351 and the CAN communication unit 353, respectively, so that the switch control unit 351 and the CAN communication unit 353 are shifted from the activated state to the sleep state (S4). As a result, the switches 33-1 to 33-4 can be kept off in the initial state. Therefore, when at least one of the assembled batteries 32-1 to 32-3 is abnormal, the assembled batteries 32-1 to 32 are used. -3 can be prevented from being used.

一方、異常判断部３５２は、起動状態移行後、電圧Ｖ１〜Ｖ３に基づいて組電池３２−１〜３２−３が異常でないと判断すると（Ｓ３がＹｅｓ）、その旨の信号をスイッチ制御部３５１に出力する。   On the other hand, if the abnormality determination unit 352 determines that the assembled batteries 32-1 to 32-3 are not abnormal based on the voltages V1 to V3 after the transition to the activation state (Yes in S3), the switch control unit 351 sends a signal to that effect. Output to.

スイッチ制御部３５１は、組電池３２−１〜３２−３が異常でない旨の信号が入力されると、スイッチ３３−１〜３３−４をそれぞれオフからオンに切り替えさせる（Ｓ５）。これにより、バッテリ３の組電池３２−１〜３２−３の直流電力を車両２のインバータ回路２２や補機２３などへ供給することができる。   When a signal indicating that the assembled batteries 32-1 to 32-3 are not abnormal is input, the switch control unit 351 switches the switches 33-1 to 33-4 from off to on (S5). Thereby, the DC power of the assembled batteries 32-1 to 32-3 of the battery 3 can be supplied to the inverter circuit 22 and the auxiliary machine 23 of the vehicle 2.

その後、検出部３５４３は、バッテリ側コネクタ３１が車両側コネクタ２１に接続されていない、すなわち、バッテリ側コネクタ３１が車両側コネクタ２１から外れたと判断すると（Ｓ６がＹｅｓ）、スイッチ制御部３５１、異常判断部３５２、及びＣＡＮ通信部３５３にそれぞれスリープ信号を出力することによりスイッチ制御部３５１、異常判断部３５２、及びＣＡＮ通信部３５３をそれぞれ起動状態からスリープ状態に移行させる（Ｓ４）。   Thereafter, when the detection unit 3543 determines that the battery-side connector 31 is not connected to the vehicle-side connector 21, that is, the battery-side connector 31 is disconnected from the vehicle-side connector 21 (Yes in S6), the switch control unit 351 is abnormal. By outputting a sleep signal to each of the determination unit 352 and the CAN communication unit 353, the switch control unit 351, the abnormality determination unit 352, and the CAN communication unit 353 are each shifted from the activated state to the sleep state (S4).

このように本実施形態のバッテリシステム１では、バッテリ側コネクタ３１が車両側コネクタ２１に接続されていないとき、スイッチ３３−１〜３３−４がそれぞれオフしているため、組電池３３−１〜３３−３のそれぞれのプラス端子をオープンにさせることができ、バッテリ３の不使用時において組電池３３−１〜３３−３間に還流電流が流れることを防止することができる。   As described above, in the battery system 1 according to the present embodiment, when the battery side connector 31 is not connected to the vehicle side connector 21, the switches 33-1 to 33-4 are turned off. Each plus terminal of 33-3 can be opened, and it is possible to prevent a reflux current from flowing between the assembled batteries 33-1 to 33-3 when the battery 3 is not used.

また、本実施形態のバッテリシステム１では、バッテリ側コネクタ３１が車両側コネクタ２１に接続されていないとき、電池ＥＣＵ３５のスイッチ制御部３５１、異常判断部３５２、及びＣＡＮ通信部３５３をスリープ状態にしているため、バッテリ３の不使用時において組電池３３−１〜３３−３からスイッチ制御部３５１、異常判断部３５２、及びＣＡＮ通信部３５３へ供給される電力を抑えることができ、バッテリ３の不使用時における組電池３３−１〜３３−３の消費電力を抑えることができる。   In the battery system 1 of the present embodiment, when the battery-side connector 31 is not connected to the vehicle-side connector 21, the switch control unit 351, the abnormality determination unit 352, and the CAN communication unit 353 of the battery ECU 35 are set in the sleep state. Therefore, when the battery 3 is not used, the power supplied from the assembled batteries 33-1 to 33-3 to the switch control unit 351, the abnormality determination unit 352, and the CAN communication unit 353 can be suppressed. The power consumption of the assembled batteries 33-1 to 33-3 during use can be suppressed.

１ バッテリシステム
２ 車両
２１ 車両側コネクタ
２２ インバータ回路
２３ 補機
２４ 走行制御ＥＣＵ
２４１ ＣＡＮ通信部
３ バッテリ
３１ バッテリ側コネクタ
３２−１〜３２−３ 組電池
３３−１〜３３−４ スイッチ
３４−１〜３４−３ 電圧センサ
３５ 電池ＥＣＵ
３５１ スイッチ制御部
３５２ 異常判断部
３５３ ＣＡＮ通信部
３５４ コネクタ接続検出部
３５４１、３５４２ 抵抗
３５４３ 検出部
DESCRIPTION OF SYMBOLS 1 Battery system 2 Vehicle 21 Vehicle side connector 22 Inverter circuit 23 Auxiliary machine 24 Travel control ECU
241 CAN communication unit 3 battery 31 battery side connector 32-1 to 32-3 assembled battery 33-1 to 33-4 switch 34-1 to 34-3 voltage sensor 35 battery ECU
351 Switch control unit 352 Abnormality determination unit 353 CAN communication unit 354 Connector connection detection unit 3541, 3542 Resistance 3543 detection unit

Claims (4)

車両とバッテリとを備えるバッテリシステムであって、
前記車両は、負荷に接続される車両側電力端子と、車両側コネクタ接続検出端子とを有する車両側コネクタを備え、
前記バッテリは、
組電池と、
スイッチと、
前記スイッチを介して前記組電池に接続されるバッテリ側電力端子と、バッテリ側コネクタ接続検出端子とを有し、前記車両側コネクタに接続されると、前記車両側電力端子及び前記バッテリ側電力端子が互いに接続されるとともに前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続されるバッテリ側コネクタと、
スリープ状態から起動状態に移行すると、前記スイッチをオフからオンに切り替えさせるスイッチ制御部と、前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続されることにより、入力される電圧が変化すると、前記バッテリ側コネクタが前記車両側コネクタに接続されたと判断し、前記スイッチ制御部をスリープ状態から起動状態に移行させるコネクタ接続判断部と、前記バッテリ側コネクタが前記車両側コネクタに接続されていない場合にスリープ状態から定期的に起動状態になって前記組電池の異常を判断する異常判断部とを有し、前記組電池に並列接続される電池制御部と、
を備えることを特徴とするバッテリシステム。 A battery system comprising a vehicle and a battery,
The vehicle includes a vehicle-side connector having a vehicle-side power terminal connected to a load and a vehicle-side connector connection detection terminal,
The battery is
An assembled battery;
A switch,
A battery-side power terminal connected to the assembled battery via the switch; and a battery-side connector connection detection terminal. When connected to the vehicle-side connector, the vehicle-side power terminal and the battery-side power terminal Are connected to each other and the battery side connector connection detection terminal and the battery side connector connection detection terminal are connected to each other, and
When a transition is made from the sleep state to the start state, the switch controller that switches the switch from off to on, and the vehicle-side connector connection detection terminal and the battery-side connector connection detection terminal are connected to each other to thereby input a voltage Is changed, the battery-side connector is determined to be connected to the vehicle-side connector, and the switch-side control unit shifts the switch control unit from a sleep state to an activated state, and the battery-side connector is connected to the vehicle-side connector. A battery control unit connected in parallel to the assembled battery, and having an abnormality determining unit that periodically enters an activated state from a sleep state and determines an abnormality of the assembled battery when not being performed,
A battery system comprising: 車両とバッテリとを備えるバッテリシステムであって、
前記車両は、負荷に接続される車両側電力端子と、車両側コネクタ接続検出端子とを有する車両側コネクタを備え、
前記バッテリは、
複数の組電池と、
前記複数の組電池に直列接続され、それぞれがオンすると前記複数の組電池を互いに並列接続させ、それぞれがオフすると前記複数の組電池を互いに切断させる複数のスイッチと、
前記複数のスイッチを介して前記複数の組電池に接続されるバッテリ側電力端子と、バッテリ側コネクタ接続検出端子とを有し、前記車両側コネクタに接続されると、前記車両側電力端子及び前記バッテリ側電力端子が互いに接続されるとともに前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続されるバッテリ側コネクタと、
スリープ状態から起動状態に移行すると、前記複数のスイッチをオフからオンに切り替えさせるスイッチ制御部と、
前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続されることにより、入力される電圧が変化すると、前記バッテリ側コネクタが前記車両側コネクタに接続されたと判断し、前記スイッチ制御部をスリープ状態から起動状態に移行させるコネクタ接続判断部と、
前記バッテリ側コネクタが前記車両側コネクタに接続されていない場合にスリープ状態から定期的に起動状態になって前記複数の組電池の異常を判断する異常判断部と
を備え、
前記スイッチ制御部は、スリープ状態から起動状態に移行した後、前記異常判断部により前記複数の組電池の異常が判断されていないとき、前記複数のスイッチをオフからオンに切り替えさせる
ことを特徴とするバッテリシステム。 A battery system comprising a vehicle and a battery,
The vehicle includes a vehicle-side connector having a vehicle-side power terminal connected to a load and a vehicle-side connector connection detection terminal,
The battery is
A plurality of assembled batteries;
A plurality of switches connected in series to the plurality of assembled batteries, each of which turns on to connect the plurality of assembled batteries in parallel to each other, and each of which turns off the plurality of assembled batteries to disconnect each other;
A battery-side power terminal connected to the plurality of assembled batteries via the plurality of switches; and a battery-side connector connection detection terminal. When connected to the vehicle-side connector, the vehicle-side power terminal and the A battery side connector in which battery side power terminals are connected to each other and the vehicle side connector connection detection terminal and the battery side connector connection detection terminal are connected to each other;
When switching from the sleep state to the activation state, a switch control unit that switches the plurality of switches from off to on,
When the input voltage changes due to the vehicle side connector connection detection terminal and the battery side connector connection detection terminal being connected to each other, it is determined that the battery side connector is connected to the vehicle side connector, and the switch control A connector connection determining unit that shifts the unit from the sleep state to the activated state;
An abnormality determination unit that periodically enters an activated state from a sleep state when the battery-side connector is not connected to the vehicle-side connector, and determines abnormality of the plurality of assembled batteries ;
The switch control unit is configured to switch the plurality of switches from off to on when the abnormality determination unit has not determined an abnormality of the plurality of assembled batteries after transitioning from a sleep state to an activation state. Battery system. 組電池と、
スイッチと、
前記スイッチを介して前記組電池に接続されるバッテリ側電力端子と、バッテリ側コネクタ接続検出端子とを有し、車両側電力端子及び車両側コネクタ接続検出端子を有する車両側コネクタに接続されると、前記車両側電力端子及び前記バッテリ側電力端子が互いに接続されるとともに前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続されるバッテリ側コネクタと、
スリープ状態から起動状態に移行すると、前記スイッチをオフからオンに切り替えさせるスイッチ制御部と、前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続されることにより、入力される電圧が変化すると、前記バッテリ側コネクタが前記車両側コネクタに接続されたと判断し、前記スイッチ制御部をスリープ状態から起動状態に移行させるコネクタ接続判断部と、前記バッテリ側コネクタが前記車両側コネクタに接続されていない場合にスリープ状態から定期的に起動状態になって前記組電池の異常を判断する異常判断部とを有し、前記組電池に並列接続される電池制御部と、
を備えることを特徴とするバッテリ。 An assembled battery;
A switch,
When connected to a vehicle side connector having a battery side power terminal and a battery side connector connection detection terminal connected to the assembled battery via the switch and having a vehicle side power terminal and a vehicle side connector connection detection terminal A battery side connector in which the vehicle side power terminal and the battery side power terminal are connected to each other and the vehicle side connector connection detection terminal and the battery side connector connection detection terminal are connected to each other;
When a transition is made from the sleep state to the start state, the switch controller that switches the switch from off to on, and the vehicle-side connector connection detection terminal and the battery-side connector connection detection terminal are connected to each other to thereby input a voltage Is changed, the battery-side connector is determined to be connected to the vehicle-side connector, and the switch-side control unit shifts the switch control unit from a sleep state to an activated state, and the battery-side connector is connected to the vehicle-side connector. A battery control unit connected in parallel to the assembled battery, and having an abnormality determining unit that periodically enters an activated state from a sleep state and determines an abnormality of the assembled battery when not being performed,
A battery comprising: 複数の組電池と、
前記複数の組電池に直列接続され、それぞれがオンすると前記複数の組電池を互いに並列接続させ、それぞれがオフすると前記複数の組電池を互いに切断させる複数のスイッチと、
前記複数のスイッチを介して前記複数の組電池に接続されるバッテリ側電力端子と、バッテリ側コネクタ接続検出端子とを有し、車両側電力端子及び車両側コネクタ接続検出端子を有する車両側コネクタに接続されると、前記車両側電力端子及び前記バッテリ側電力端子が互いに接続されるとともに前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続されるバッテリ側コネクタと、
スリープ状態から起動状態に移行すると、前記複数のスイッチをオフからオンに切り替えさせるスイッチ制御部と、
前記車両側コネクタ接続検出端子及び前記バッテリ側コネクタ接続検出端子が互いに接続されることにより、入力される電圧が変化すると、前記バッテリ側コネクタが前記車両側コネクタに接続されたと判断し、前記スイッチ制御部をスリープ状態から起動状態に移行させるコネクタ接続判断部と、
前記バッテリ側コネクタが前記車両側コネクタに接続されていない場合にスリープ状態から定期的に起動状態になって前記複数の組電池の異常を判断する異常判断部と
を備え、
前記スイッチ制御部は、スリープ状態から起動状態に移行した後、前記異常判断部により前記複数の組電池の異常が判断されていないとき、前記複数のスイッチをオフからオンに切り替えさせる
ことを特徴とするバッテリ。 A plurality of assembled batteries;
A plurality of switches connected in series to the plurality of assembled batteries, each of which turns on to connect the plurality of assembled batteries in parallel to each other, and each of which turns off the plurality of assembled batteries to disconnect each other;
A vehicle-side connector having a battery-side power terminal connected to the plurality of assembled batteries via the plurality of switches, a battery-side connector connection detection terminal, and having a vehicle-side power terminal and a vehicle-side connector connection detection terminal When connected, the vehicle side power terminal and the battery side power terminal are connected to each other and the vehicle side connector connection detection terminal and the battery side connector connection detection terminal are connected to each other, and
When switching from the sleep state to the activation state, a switch control unit that switches the plurality of switches from off to on,
When the input voltage changes due to the vehicle side connector connection detection terminal and the battery side connector connection detection terminal being connected to each other, it is determined that the battery side connector is connected to the vehicle side connector, and the switch control A connector connection determining unit that shifts the unit from the sleep state to the activated state;
An abnormality determination unit that periodically enters an activated state from a sleep state when the battery-side connector is not connected to the vehicle-side connector, and determines abnormality of the plurality of assembled batteries ;
The switch control unit is configured to switch the plurality of switches from off to on when the abnormality determination unit has not determined an abnormality of the plurality of assembled batteries after transitioning from a sleep state to an activation state. To battery.
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