JP6098478B2 - Battery monitoring device - Google Patents

Battery monitoring device Download PDF

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JP6098478B2
JP6098478B2 JP2013232742A JP2013232742A JP6098478B2 JP 6098478 B2 JP6098478 B2 JP 6098478B2 JP 2013232742 A JP2013232742 A JP 2013232742A JP 2013232742 A JP2013232742 A JP 2013232742A JP 6098478 B2 JP6098478 B2 JP 6098478B2
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battery
monitoring
monitoring unit
unit
switch
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JP2015095919A (en
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隆介 長谷
隆介 長谷
悟士 山本
悟士 山本
隆広 都竹
隆広 都竹
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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

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Description

本発明は、電池を監視する電池監視装置に関する。   The present invention relates to a battery monitoring device that monitors a battery.

近年では、例えば、電動フォークリフト、ハイブリッドカー、又は電気自動車など、電動モータを利用する車両が注目されている。
この種の車両に搭載される電池の中には、例えば、特許文献１に開示される技術のように、高電圧出力を実現するために複数の二次電池が直列接続されることにより構成され、それら二次電池の長寿命化を図るために、各二次電池の電圧の均等化が行われるものがある。 In recent years, for example, vehicles using an electric motor such as an electric forklift, a hybrid car, or an electric vehicle have attracted attention.
Among the batteries mounted on this type of vehicle, for example, as in the technique disclosed in Patent Document 1, a plurality of secondary batteries are connected in series in order to realize a high voltage output. In order to extend the life of these secondary batteries, there is a battery in which the voltages of the secondary batteries are equalized.

また、この種の車両に搭載される電池の中には、イグニッションオン時だけでなくイグニッションオフ時においても、電動モータ以外の補機に電力が使われるものがある。このように、負荷へ電力を長い時間供給する可能性がある電池では、その間に行われる電池の監視も長時間になるおそれがある。そして、電池の監視が長時間になる場合では、電池の監視を行う電池監視部への電力供給も長時間になり、その電池監視部への電力供給に伴う電池の充電容量の低下が懸念される。   In addition, some of the batteries mounted on this type of vehicle use electric power for auxiliary machines other than the electric motor not only when the ignition is on but also when the ignition is off. As described above, in a battery in which power may be supplied to the load for a long time, the monitoring of the battery performed during that time may take a long time. When the battery monitoring takes a long time, the power supply to the battery monitoring unit that monitors the battery also takes a long time, and there is a concern that the charging capacity of the battery may be reduced due to the power supply to the battery monitoring unit. The

特開２０１１−１１５０１５号公報JP 2011-1115015 A

本発明は、電池の監視時間を低減することで、電池の監視に伴う電池の充電容量の低下を抑えることができる電池監視装置を提供することを目的とする。   An object of this invention is to provide the battery monitoring apparatus which can suppress the fall of the charging capacity of the battery accompanying the monitoring of a battery by reducing the monitoring time of a battery.

実施形態の電池監視装置は、監視部と、電池監視部と、スイッチと、電池制御部とを備える。
監視部は、電池を監視する。 The battery monitoring device of the embodiment includes a monitoring unit, a battery monitoring unit, a switch, and a battery control unit.
The monitoring unit monitors the battery.

電池監視部は、監視部の監視結果を示す情報を送る。
スイッチは、電池から電池監視部への電力の供給と遮断を切り替える。
電池制御部は、電池監視部から送られてくる情報に基づいて電池を使用不可状態にするか否かを制御するとともに、電池から電池監視部への電力の供給と遮断が交互に切り替わるように、スイッチの動作を制御する。 The battery monitoring unit sends information indicating the monitoring result of the monitoring unit.
The switch switches between supply and interruption of power from the battery to the battery monitoring unit.
The battery control unit controls whether or not to make the battery unusable based on information sent from the battery monitoring unit, and the power supply from the battery to the battery monitoring unit is alternately switched between power supply and interruption. Control the operation of the switch.

これにより、電池の監視を間欠的に行うことができる。   Thereby, the battery can be monitored intermittently.

本発明によれば、電池の監視を間欠的に行うことができるため、電池の監視時間を低減することができ、電池の監視に伴う電池の充電容量の低下を抑えることができる。   According to the present invention, since the battery can be monitored intermittently, the battery monitoring time can be reduced, and the decrease in the charging capacity of the battery accompanying the battery monitoring can be suppressed.

実施形態の電池監視装置を含む電池パックの一例を示す図である。It is a figure which shows an example of the battery pack containing the battery monitoring apparatus of embodiment. 電池制御部の動作の一例を示すフローチャートである。It is a flowchart which shows an example of operation | movement of a battery control part.

図１は、実施形態の電池監視装置を含む電池パックの一例を示す図である。
図１に示す電池パック１は、例えば、車両（例えば、電動フォークリフト、ハイブリッドカー、又は電気自動車など）に搭載されるものであって、電池２と、スイッチ３と、電池監視ＥＣＵ（Electronic Control Unit）４と、電池制御ＥＣＵ５とを備える。本実施形態の電池パック１では、３つの電池２Ａ〜２Ｃが備えられる構成であるが、電池２の数は特に限定されない。 FIG. 1 is a diagram illustrating an example of a battery pack including the battery monitoring device of the embodiment.
A battery pack 1 shown in FIG. 1 is mounted on, for example, a vehicle (for example, an electric forklift, a hybrid car, or an electric vehicle), and includes a battery 2, a switch 3, a battery monitoring ECU (Electronic Control Unit). ) 4 and a battery control ECU 5. In the battery pack 1 of the present embodiment, the three batteries 2A to 2C are provided, but the number of the batteries 2 is not particularly limited.

電池２Ａ〜２Ｃは、互いに並列接続されるとともに、それぞれ、直列接続される７つの二次電池（例えば、リチウムイオン二次電池やニッケル水素電池など）により構成される。   The batteries 2A to 2C are configured by seven secondary batteries (for example, a lithium ion secondary battery and a nickel metal hydride battery) that are connected in parallel to each other and connected in series.

スイッチ３は、例えば、機械式リレーやトランジスタなどにより構成され、電池２毎に設けられている。すなわち、スイッチ３Ａは電池２Ａとグランドとの間に設けられ、スイッチ３Ｂは電池２Ｂとグランドとの間に設けられ、スイッチ３Ｃは電池２Ｃとグランドとの間に設けられている。   The switch 3 is composed of, for example, a mechanical relay or a transistor, and is provided for each battery 2. That is, the switch 3A is provided between the battery 2A and the ground, the switch 3B is provided between the battery 2B and the ground, and the switch 3C is provided between the battery 2C and the ground.

電池監視ＥＣＵ４も、電池２毎に設けられている。すなわち、電池監視ＥＣＵ４Ａは電池２Ａを監視し、電池監視ＥＣＵ４Ｂは電池２Ｂを監視し、電池監視ＥＣＵ４Ｃは電池２Ｃを監視する。また、電池監視ＥＣＵ４Ａ〜４Ｃは、それぞれ、電池２の異常（例えば、電池２の過充電又は過放電など）を監視する監視部６と、監視部６の監視結果を示す情報を電池制御ＥＣＵ５へ送る電池監視部７とを備える。なお、監視部６は、ＩＣ（Integrated Circuit）などにより構成される。また、電池監視部７は、例えば、ＣＰＵ（Central Processing Unit）、マルチコアＣＰＵ、プログラマブルなデバイス（ＦＰＧＡ（Field Programmable Gate Array）やＰＬＤ（Programmable Logic Device）など）などにより構成される。   A battery monitoring ECU 4 is also provided for each battery 2. That is, the battery monitoring ECU 4A monitors the battery 2A, the battery monitoring ECU 4B monitors the battery 2B, and the battery monitoring ECU 4C monitors the battery 2C. Further, each of the battery monitoring ECUs 4A to 4C monitors the abnormality of the battery 2 (for example, overcharge or overdischarge of the battery 2) and information indicating the monitoring result of the monitoring unit 6 to the battery control ECU 5. A battery monitoring unit 7 to be sent. The monitoring unit 6 is configured by an IC (Integrated Circuit) or the like. The battery monitoring unit 7 includes, for example, a CPU (Central Processing Unit), a multi-core CPU, a programmable device (FPGA (Field Programmable Gate Array), PLD (Programmable Logic Device), etc.), and the like.

監視部６Ａは電池２Ａの異常を監視し、監視部６Ｂは電池２Ｂの異常を監視し、監視部６Ｃは電池２Ｃの異常を監視する。
電池監視部７Ａは監視部６Ａの監視結果を示す情報を電池制御ＥＣＵ５へ送り、電池監視部７Ｂは監視部６Ｂの監視結果を示す情報を電池制御ＥＣＵ５へ送り、電池監視部７Ｃは監視部６Ｃの監視結果を示す情報を電池制御ＥＣＵ５へ送る。なお、電池監視部７Ａ〜７Ｃは、不図示の他の監視部により検出される電池２Ａ〜２Ｃの温度や電池２Ａ〜２Ｃに流れる電流が閾値以上である場合、電池２Ａ〜２Ｃが異常であると判断し、その旨を監視結果を示す情報として電池制御ＥＣＵ５へ送るように構成してもよい。また、不図示の他の監視部により検出される電池２Ａ〜２Ｃの温度や電池２Ａ〜２Ｃに流れる電流が監視結果を示す情報として電池監視部７Ａ〜７Ｃから電池制御ＥＣＵ５へ送られ、電池制御ＥＣＵ５がその情報に基づいて電池２Ａ〜２Ｃが異常であるか否かを判断するように構成してもよい。 The monitoring unit 6A monitors the abnormality of the battery 2A, the monitoring unit 6B monitors the abnormality of the battery 2B, and the monitoring unit 6C monitors the abnormality of the battery 2C.
The battery monitoring unit 7A sends information indicating the monitoring result of the monitoring unit 6A to the battery control ECU 5, the battery monitoring unit 7B sends information indicating the monitoring result of the monitoring unit 6B to the battery control ECU 5, and the battery monitoring unit 7C includes the monitoring unit 6C. Information indicating the monitoring result is sent to the battery control ECU 5. The battery monitoring units 7A to 7C are abnormal when the temperature of the batteries 2A to 2C detected by other monitoring units (not shown) and the current flowing through the batteries 2A to 2C are equal to or greater than the threshold. It may be determined that the information is sent to the battery control ECU 5 as information indicating the monitoring result. Further, the temperatures of the batteries 2A to 2C detected by other monitoring units (not shown) and the currents flowing through the batteries 2A to 2C are sent from the battery monitoring units 7A to 7C to the battery control ECU 5 as information indicating the monitoring results, and battery control is performed. The ECU 5 may be configured to determine whether or not the batteries 2A to 2C are abnormal based on the information.

電池制御ＥＣＵ５は、電源部８と、スイッチ９と、電池制御部１０とを備える。なお、電池制御部１０は、例えば、ＣＰＵ、マルチコアＣＰＵ、プログラマブルなデバイスなどにより構成される。また、特許請求の範囲における電池監視装置は、例えば、少なくとも、監視部６と、電池監視部７と、スイッチ９と、電池制御部１０とを備えて構成される。   The battery control ECU 5 includes a power supply unit 8, a switch 9, and a battery control unit 10. The battery control unit 10 is configured by, for example, a CPU, a multi-core CPU, a programmable device, and the like. Further, the battery monitoring device in the claims includes, for example, at least a monitoring unit 6, a battery monitoring unit 7, a switch 9, and a battery control unit 10.

電源部８は、例えば、ＤＣ−ＤＣコンバータなどにより構成され、電池２Ａ〜２Ｃの出力電圧を予め決められた電圧に変換する。
スイッチ９は、例えば、機械式リレーやトランジスタなどにより構成され、電池２から電池監視部７への電力の供給と遮断を切り替える。すなわち、スイッチ３Ａ〜３Ｃがオンしている場合、スイッチ９がオンすると、電池２Ａ〜２Ｃから電池監視部７Ａ〜７Ｃへ電力が供給され、スイッチ９がオフすると、電池２Ａ〜２Ｃから電池監視部７Ａ〜７Ｃへの電力が遮断される。また、本実施形態では、スイッチ９が電源部８と電池監視部７Ａ〜７Ｃの接続点との間に設けられているため、１つのスイッチ９のオン、オフの切り替えにより、電池２Ａ〜２Ｃのうちの少なくとも１つの電池２から電池監視部７Ａ〜７Ｃへの電力の供給と遮断の切り替えを行うことができる。これにより、電池監視部７Ａ〜７Ｃの接続点と電池監視部７Ａとの間、電池監視部７Ａ〜７Ｃの接続点と電池監視部７Ｂとの間、及び電池監視部７Ａ〜７Ｃの接続点と電池監視部７Ｃとの間にそれぞれスイッチ９を設ける場合に比べて、スイッチ９の数を低減することができる。 The power supply unit 8 is configured by a DC-DC converter, for example, and converts the output voltages of the batteries 2A to 2C into a predetermined voltage.
The switch 9 is configured by, for example, a mechanical relay, a transistor, or the like, and switches between supply and interruption of power from the battery 2 to the battery monitoring unit 7. That is, when the switches 3A to 3C are turned on, when the switch 9 is turned on, power is supplied from the batteries 2A to 2C to the battery monitoring units 7A to 7C, and when the switch 9 is turned off, the batteries 2A to 2C are switched to the battery monitoring unit. Power to 7A-7C is cut off. Moreover, in this embodiment, since the switch 9 is provided between the connection part of the power supply part 8 and battery monitoring part 7A-7C, switching of one switch 9 on and off of battery 2A-2C is carried out. It is possible to switch between power supply and interruption from at least one of the batteries 2 to the battery monitoring units 7A to 7C. Thereby, between the connection point of battery monitoring parts 7A-7C and battery monitoring part 7A, between the connection point of battery monitoring parts 7A-7C and battery monitoring part 7B, and the connection point of battery monitoring parts 7A-7C The number of switches 9 can be reduced as compared with the case where the switches 9 are provided between the battery monitoring unit 7C and each.

電池制御部１０は、電池監視部７Ａから送られてくる情報により電池２Ａが異常であると判断すると、スイッチ３Ａをオフして電池２Ａを使用不可状態にする。また、電池制御部１０は、電池監視部７Ｂから送られてくる情報により電池２Ｂが異常であると判断すると、スイッチ３Ｂをオフして電池２Ｂを使用不可状態にする。また、電池制御部１０は、電池監視部７Ｃから送られてくる情報により電池２Ｃが異常であると判断すると、スイッチ３Ｃをオフして電池２Ｃを使用不可状態にする。なお、本実施形態では、電池監視部７Ａ〜７Ｃと電池制御部１０とをつなぐ信号線をデイジーチェーンで接続している。また、電池監視部７Ａ〜７Ｃと電池制御部１０とをつなぐ信号線をバスで接続してもよい。また、電池監視部７Ａと電池制御部１０との間、電池監視部７Ｂと電池制御部１０との間、電池監視部７Ｃと電池制御部１０との間をそれぞれ信号線で直接接続してもよい。   When the battery control unit 10 determines that the battery 2A is abnormal based on the information sent from the battery monitoring unit 7A, the battery control unit 10 turns off the switch 3A to make the battery 2A unusable. Further, when the battery control unit 10 determines that the battery 2B is abnormal based on the information sent from the battery monitoring unit 7B, the battery control unit 10 turns off the switch 3B to make the battery 2B unusable. Further, when the battery control unit 10 determines that the battery 2C is abnormal based on the information transmitted from the battery monitoring unit 7C, the battery control unit 10 turns off the switch 3C to make the battery 2C unusable. In the present embodiment, the signal lines connecting the battery monitoring units 7A to 7C and the battery control unit 10 are connected in a daisy chain. Moreover, you may connect the signal wire | line which connects battery monitoring part 7A-7C and the battery control part 10 with a bus | bath. Alternatively, the battery monitoring unit 7A and the battery control unit 10, the battery monitoring unit 7B and the battery control unit 10, and the battery monitoring unit 7C and the battery control unit 10 may be directly connected by signal lines. Good.

また、電池制御部１０は、車両側に設けられ車両の動作を制御する車両側制御部１１から送られてくる情報により、イグニッションがオフ状態であると判断すると、電池２から電池監視部７への電力の供給と遮断が交互に切り替わるように、スイッチ９の動作を制御する。   Further, when the battery control unit 10 determines that the ignition is off based on information sent from the vehicle-side control unit 11 that is provided on the vehicle side and controls the operation of the vehicle, the battery control unit 10 transfers the battery 2 to the battery monitoring unit 7. The operation of the switch 9 is controlled so that the supply and interruption of the power are alternately switched.

図２は、電池制御部１０の動作の一例を示すフローチャートである。
まず、電池制御部１０は、イグニッションオフを判断した後（Ｓ１：Ｙｅｓ）、少なくとも１つの電池２が異常であると判断すると（Ｓ２：Ｎｏ）、その電池２に対応するスイッチ３をオフさせてその電池２を使用不可状態にした後（Ｓ３）、その電池２が異常である旨をＬＥＤの点灯などによりユーザに報知する（Ｓ４）。 FIG. 2 is a flowchart showing an example of the operation of the battery control unit 10.
First, after determining that the ignition is off (S1: Yes), the battery control unit 10 determines that at least one battery 2 is abnormal (S2: No), and then turns off the switch 3 corresponding to the battery 2. After making the battery 2 unusable (S3), the user is notified that the battery 2 is abnormal by turning on an LED (S4).

また、電池制御部１０は、イグニッションオフを判断した後（Ｓ１：Ｙｅｓ）、全ての電池２が異常でないと判断すると（Ｓ２：Ｙｅｓ）、スイッチ９をオフさせて（Ｓ５）、自身をスリープ状態にする（Ｓ６）。   In addition, after determining that the ignition is off (S1: Yes), the battery control unit 10 determines that all the batteries 2 are not abnormal (S2: Yes), turns off the switch 9 (S5), and makes itself sleep. (S6).

次に、電池制御部１０は、一定時間経過後（Ｓ７：Ｙｅｓ）、自身をスリープ状態からウェイクアップし（Ｓ８）、スイッチ９をオンさせて（Ｓ９）、Ｓ２に戻り電池２の監視を再度行う。これにより、電池２から電池監視部７への電力の供給と遮断が交互に切り替わるため、電池監視部７が間欠動作する。   Next, after a predetermined time has elapsed (S7: Yes), the battery control unit 10 wakes itself up from the sleep state (S8), turns on the switch 9 (S9), returns to S2, and monitors the battery 2 again. Do. Thereby, since supply and interruption of power from the battery 2 to the battery monitoring unit 7 are switched alternately, the battery monitoring unit 7 operates intermittently.

このように、本実施形態では、イグニッションオフ時において、電池監視部７が間欠動作するため、電池監視部７により消費される電池２の電力量を抑えることができる。イグニッションオフ時は、走行用モータなどの消費電力が比較的大きな負荷が停止し、イグニッションオン時に比べて電池２の電力供給量が少なくなるため、電池監視部７や監視部６による断続的な監視で十分と考えることができる。そのため、イグニッションオフ時において、電池監視部７を間欠動作することで、電池２の監視時間を低減することができ、電池２の監視に伴う電池２の充電容量の低下を抑えることができる。なお、イグニッションオフ時において、走行用モータや補機などの車両側の負荷により電池２の電力が消費されておらず、電池２の電力が監視部６、電池監視部７、及び電池制御部１０のみにより消費されるとき、電池２から電池監視部７への電力の供給と遮断が交互に切り替わるように、スイッチ９の動作を制御するように構成してもよい。このように構成しても、イグニッションオン時以外の電池監視期間において、電池２の監視時間を低減することができるため、電池２の監視に伴う電池２の充電容量の低下を抑えることができる。   Thus, in the present embodiment, since the battery monitoring unit 7 operates intermittently when the ignition is off, the amount of power of the battery 2 consumed by the battery monitoring unit 7 can be suppressed. When the ignition is off, the load that consumes a relatively large amount of power, such as a traveling motor, stops, and the amount of power supplied to the battery 2 is smaller than when the ignition is on. Therefore, intermittent monitoring by the battery monitoring unit 7 and the monitoring unit 6 is performed. Can be considered sufficient. Therefore, by intermittently operating the battery monitoring unit 7 when the ignition is off, the monitoring time of the battery 2 can be reduced, and the decrease in the charging capacity of the battery 2 accompanying the monitoring of the battery 2 can be suppressed. When the ignition is off, the power of the battery 2 is not consumed by a load on the vehicle side such as a traveling motor or an auxiliary machine, and the power of the battery 2 is monitored by the monitoring unit 6, the battery monitoring unit 7, and the battery control unit 10. It may be configured to control the operation of the switch 9 so that the supply and interruption of power from the battery 2 to the battery monitoring unit 7 are alternately switched when consumed only by the battery. Even if comprised in this way, since the monitoring time of the battery 2 can be reduced in the battery monitoring period other than when the ignition is turned on, a decrease in the charging capacity of the battery 2 accompanying the monitoring of the battery 2 can be suppressed.

また、本実施形態では、電池２から監視部６へ駆動用電力が直接供給され、電池監視部７から監視部６へ駆動用制御信号（例えば、予め決められた電圧）が出力されている間のみ、監視部６が駆動する。そのため、スイッチ９がオフして電池２から電池監視部７への電力が遮断され、電池監視部７が停止すると、電池監視部７から監視部６への駆動用制御信号も無くなり、監視部６も停止する。これにより、イグニッションオン時以外の電池監視期間において、スイッチ９のオン、オフが繰り返されると、電池監視部７だけでなく監視部６も間欠動作するため、監視部６により消費される電池２の電力量も抑えることができる。従って、電池２の監視に伴う電池２の充電容量の低下をさらに抑えることができる。なお、電源部８の出力をスイッチ９を介して直接監視部６に駆動用制御信号として入力してもよい。このように構成する場合、スイッチ９がオンすると、電源部８の出力が駆動用制御信号として監視部６に入力されて監視部６が駆動し、スイッチ９がオフすると、電源部８の出力が監視部６に入力されなくなり監視部６が停止する。このように構成する場合、スイッチ９と監視部６との間に電圧変換部を設けてもよい。   In the present embodiment, driving power is directly supplied from the battery 2 to the monitoring unit 6, and a driving control signal (for example, a predetermined voltage) is output from the battery monitoring unit 7 to the monitoring unit 6. Only the monitoring unit 6 is driven. Therefore, when the switch 9 is turned off and the power from the battery 2 to the battery monitoring unit 7 is cut off and the battery monitoring unit 7 is stopped, the drive control signal from the battery monitoring unit 7 to the monitoring unit 6 is also eliminated. Also stop. As a result, when the switch 9 is repeatedly turned on and off in the battery monitoring period other than when the ignition is on, not only the battery monitoring unit 7 but also the monitoring unit 6 operates intermittently, so that the battery 2 consumed by the monitoring unit 6 The amount of power can also be reduced. Accordingly, it is possible to further suppress a decrease in the charging capacity of the battery 2 due to the monitoring of the battery 2. Note that the output of the power supply unit 8 may be directly input to the monitoring unit 6 via the switch 9 as a drive control signal. In this configuration, when the switch 9 is turned on, the output of the power supply unit 8 is input as a drive control signal to the monitoring unit 6 to drive the monitoring unit 6, and when the switch 9 is turned off, the output of the power supply unit 8 is The monitoring unit 6 stops because it is no longer input to the monitoring unit 6. In the case of such a configuration, a voltage conversion unit may be provided between the switch 9 and the monitoring unit 6.

また、本実施形態では、スイッチ９のオフ時において、電池制御部１０をスリープ状態にし、電池制御部１０の全ての機能のうちの一部の機能のみを動作させる。これにより、イグニッションオン時以外の電池監視期間において、スイッチ９のオン、オフが繰り返されると、電池制御部１０により消費される電池２の電力量も抑えることができる。従って、電池２の監視に伴う電池２の充電容量の低下をさらに抑えることができる。   Further, in the present embodiment, when the switch 9 is turned off, the battery control unit 10 is set in the sleep state, and only some of the functions of the battery control unit 10 are operated. Thereby, when the switch 9 is repeatedly turned on and off in the battery monitoring period other than when the ignition is on, the amount of power of the battery 2 consumed by the battery control unit 10 can also be suppressed. Accordingly, it is possible to further suppress a decrease in the charging capacity of the battery 2 due to the monitoring of the battery 2.

１ 電池パック
２ 電池
３ スイッチ
４ 電池監視ＥＣＵ
５ 電池制御ＥＣＵ
６ 監視部
７ 電池監視部
８ 電源部
９ スイッチ
１０ 電池制御部
１１ 車両側制御部
1 Battery Pack 2 Battery 3 Switch 4 Battery Monitoring ECU
5 Battery control ECU
6 Monitoring Unit 7 Battery Monitoring Unit 8 Power Supply Unit 9 Switch 10 Battery Control Unit 11 Vehicle Side Control Unit

Claims (3)

電池を監視する監視部と、
複数の前記電池毎に備えられ、前記監視部の監視結果を示す情報を送る電池監視部と、
前記電池監視部から送られてくる情報に基づいて前記電池を使用不可状態にするか否かを制御する電池制御部と、
前記各電池のうちの少なくとも１つの電池から前記各電池監視部への電力の供給と遮断を切り替えるスイッチと、
を備え、
前記電池制御部は、前記各電池のうちの少なくとも１つの電池から前記各電池監視部への電力の供給と遮断が交互に切り替わるように、前記スイッチの動作を制御する
ことを特徴とする電池監視装置。 A monitoring unit for monitoring the battery;
A battery monitoring unit that is provided for each of the plurality of batteries and sends information indicating a monitoring result of the monitoring unit;
A battery control unit for controlling whether to make the battery unusable based on information sent from the battery monitoring unit;
A switch that switches between supply and interruption of power from at least one of the batteries to each battery monitoring unit;
With
The battery control unit is configured so as to cut off the supply of power from the at least one battery out of the battery to the respective battery monitoring unit is switched alternately, the battery and controlling the operation of said switch monitoring apparatus. 請求項１に記載の電池監視装置であって、
前記電池制御部は、前記各電池のうちの少なくとも１つの電池から前記各電池監視部への電力の遮断が行われるように、前記スイッチの動作を制御しているとき、自身をスリープ状態にする
ことを特徴とする電池監視装置。 The battery monitoring device according to claim 1,
The battery control unit is configured such that the power cut-off of at least one battery out of the battery to the respective battery monitoring unit is carried out, when controlling the operation of said switch to itself to sleep A battery monitoring device. 請求項１又は請求項２に記載の電池監視装置であって、
前記監視部は、前記電池から駆動用電力が直接供給され、前記各電池のうちの少なくとも１つの電池から前記各電池監視部への電力の遮断が行われているときに停止する
ことを特徴とする電池監視装置。 The battery monitoring device according to claim 1 or 2,
The monitoring unit includes a feature to stop when the drive power from the battery is supplied directly, the power interruption of the at least one battery out of the battery to the respective battery monitoring unit is being performed Battery monitoring device.
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