JP2016131451A - Power storage device - Google Patents

Power storage device Download PDF

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JP2016131451A
JP2016131451A JP2015004852A JP2015004852A JP2016131451A JP 2016131451 A JP2016131451 A JP 2016131451A JP 2015004852 A JP2015004852 A JP 2015004852A JP 2015004852 A JP2015004852 A JP 2015004852A JP 2016131451 A JP2016131451 A JP 2016131451A
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battery module
storage device
power storage
battery modules
abnormality
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JP6409582B2 (en
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順一 波多野
Junichi Hatano
順一 波多野
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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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Abstract

PROBLEM TO BE SOLVED: To provide a power storage device having battery modules connected in parallel with each other, and arranged so that when separating a battery module staying in an abnormal condition from one or each battery module other than that, a current over an allowable current can be prevented from passing through the one or each battery module.SOLUTION: A power storage device 1 comprises: battery modules 2 connected in parallel with each other; switches 3 connected with the battery modules 2 respectively; and a control part 4. The control part controls the operation of the switches 3 as follows. When at least one battery module 2 of the battery modules 2 reaches a condition before it is determined to be abnormal, the control part reduces an electric power to be supplied to the power storage device 1 from a battery charger 5. When the battery module 2 staying in the condition before it is determined to be abnormal goes into a condition in which it is determined to be abnormal, the control part controls the switch to electrically separate the battery module 2 determined to be abnormal from one or each remaining battery module 2 other than that.SELECTED DRAWING: Figure 1

Description

本発明は、互いに並列接続される複数の電池モジュールを有する蓄電装置に関する。   The present invention relates to a power storage device having a plurality of battery modules connected in parallel to each other.

電動フォークリフトやプラグインハイブリッド車など、電動モータの動力を利用して走行する車両の普及に伴い、車両に搭載される蓄電装置の技術の向上が図られている。例えば、互いに並列接続される複数の電池モジュールのうちの何れかの電池モジュールに異常が検出されると、その電池モジュールを他の電池モジュールから電気的に切り離す機能を有する蓄電装置がある。例えば、特許文献１〜３参照。   With the spread of vehicles that use electric motor power such as electric forklifts and plug-in hybrid vehicles, the technology of power storage devices mounted on the vehicles has been improved. For example, there is a power storage device having a function of electrically disconnecting a battery module from other battery modules when an abnormality is detected in any one of a plurality of battery modules connected in parallel to each other. For example, see Patent Documents 1 to 3.

このような蓄電装置では、異常状態の蓄電装置を他の電池モジュールから切り離すとき、残りの電池モジュールに許容電流を超える電流が流れないように、充電器から蓄電装置へ供給される電力を小さくさせる必要がある。   In such a power storage device, when the power storage device in an abnormal state is disconnected from other battery modules, the power supplied from the charger to the power storage device is reduced so that no current exceeding the allowable current flows through the remaining battery modules. There is a need.

しかしながら、蓄電装置から充電器への電流指令値の通信時間や充電器の出力電流の制御時間の分、充電器から蓄電装置へ供給される電力が変化するタイミングが、電流指令値を変化させるタイミングよりも遅れてしまう。そのため、異常状態の電池モジュールを他の電池モジュールから切り離すと同時に電流指令値を小さくしても、充電器から蓄電装置へ供給される電力が小さくなる前に、異常状態の電池モジュールが他の電池モジュールから切り離されてしまい、残りの電池モジュールに許容電流を超える電流が流れてしまうおそれがある。   However, the timing at which the power supplied from the charger to the power storage device changes by the amount of the communication time of the current command value from the power storage device to the charger and the control time of the output current of the charger changes the current command value. Will be late. Therefore, even if the battery module in the abnormal state is disconnected from the other battery modules and the current command value is reduced at the same time, the battery module in the abnormal state is not connected to the other battery before the power supplied from the charger to the power storage device is reduced. There is a risk that a current exceeding the allowable current may flow through the remaining battery modules due to disconnection from the module.

特開２００１−１８５２２８号公報JP 2001-185228 A 特開２０１３−２５５３２５号公報JP 2013-255325 A 特開２０１４−０５０１２９号公報JP 2014-050129 A

本発明は、互いに並列接続される複数の電池モジュールを有する蓄電装置において、異常状態の電池モジュールを他の電池モジュールから切り離すとき、残りの電池モジュールに許容電流を超える電流が流れないようにすることを目的とする。   According to the present invention, in a power storage device having a plurality of battery modules connected in parallel to each other, when an abnormal battery module is disconnected from other battery modules, current exceeding the allowable current does not flow through the remaining battery modules. With the goal.

実施形態の蓄電装置は、並列接続される複数の電池モジュールを備える蓄電装置であって、前記複数の電池モジュールにそれぞれ接続されるスイッチと、前記複数の電池モジュールのうちの少なくとも１つの電池モジュールの状態が異常確定前状態になると、充電器から当該蓄電装置へ供給される電力を小さくさせ、前記異常確定前状態の電池モジュールの状態が異常確定状態になると、前記異常確定状態の電池モジュールが他の電池モジュールから電気的に切り離されるように前記スイッチの動作を制御する制御部とを備える。   The power storage device of the embodiment is a power storage device including a plurality of battery modules connected in parallel, each of a switch connected to each of the plurality of battery modules, and at least one battery module of the plurality of battery modules. When the state becomes the state before the abnormality confirmation, the power supplied from the charger to the power storage device is reduced, and when the state of the battery module in the state before the abnormality confirmation becomes the abnormality confirmation state, the battery module in the abnormality confirmation state becomes another A control unit that controls the operation of the switch so as to be electrically disconnected from the battery module.

本発明によれば、互いに並列接続される複数の電池モジュールを有する蓄電装置において、異常状態の電池モジュールを他の電池モジュールから切り離すとき、残りの電池モジュールに許容電流を超える電流が流れないようにすることができる。   According to the present invention, in a power storage device having a plurality of battery modules connected in parallel to each other, when disconnecting an abnormal battery module from other battery modules, a current exceeding the allowable current does not flow through the remaining battery modules. can do.

実施形態の蓄電装置の一例を示す図である。It is a figure which shows an example of the electrical storage apparatus of embodiment. 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 control part.

図１は、実施形態の蓄電装置の一例を示す図である。
図１に示す蓄電装置１は、例えば、電動フォークリフトやプラグインハイブリッド車など、電動モータの動力を利用して走行する車両に搭載される電池パックであり、車両に搭載される走行用の電動モータや電装部品などに電力を供給する。 FIG. 1 is a diagram illustrating an example of the power storage device according to the embodiment.
A power storage device 1 illustrated in FIG. 1 is a battery pack that is mounted on a vehicle that travels by using the power of an electric motor, such as an electric forklift or a plug-in hybrid vehicle, and the traveling electric motor that is mounted on the vehicle. Supply power to electrical components.

また、蓄電装置１は、互いに並列接続される電池モジュール２（２−１〜２−ｎ）と、各電池モジュール２に直列接続されるスイッチ３（３−１〜３−ｎ）と、制御部４とを備える。   In addition, the power storage device 1 includes battery modules 2 (2-1 to 2-n) connected in parallel to each other, switches 3 (3-1 to 3-n) connected in series to the battery modules 2, and a control unit 4.

各電池モジュール２は、例えば、リチウムイオン電池又はニッケル水素電池などの１以上の二次電池が直列接続されて構成される。
各スイッチ３は、例えば、機械式リレーやＭＯＳＦＥＴ（Metal Oxide Semiconductor Field Effect Transistor）などの半導体スイッチである。なお、図１の例では、各スイッチ３が電池モジュール２のプラス端子側に設けられているが、電池モジュール２のマイナス端子側に設けられていてもよい。スイッチ３がオンからオフになると、そのスイッチ３に接続される電池モジュール２が他の電池モジュール２から電気的に切り離される。また、スイッチ３がオンであるとき、そのスイッチ３に接続されるすべての電池モジュール２が互いに電気的に接続されている。 Each battery module 2 is configured by, for example, one or more secondary batteries such as a lithium ion battery or a nickel metal hydride battery connected in series.
Each switch 3 is, for example, a semiconductor switch such as a mechanical relay or a MOSFET (Metal Oxide Semiconductor Field Effect Transistor). In the example of FIG. 1, each switch 3 is provided on the positive terminal side of the battery module 2, but may be provided on the negative terminal side of the battery module 2. When the switch 3 is turned off from on, the battery module 2 connected to the switch 3 is electrically disconnected from the other battery modules 2. Further, when the switch 3 is on, all the battery modules 2 connected to the switch 3 are electrically connected to each other.

制御部４は、例えば、ＣＰＵ（Central Processing Unit）、マルチコアＣＰＵ、又はプログラマブルなディバイス（ＦＰＧＡ（Field Programmable Gate Array）やＰＬＤ（Programmable Logic Device）など）である。   The control unit 4 is, for example, a CPU (Central Processing Unit), a multi-core CPU, or a programmable device (FPGA (Field Programmable Gate Array), PLD (Programmable Logic Device, etc.)).

また、制御部４は、充電中、制御タイミング毎に、各電池モジュール２に対して異常検出処理を行う。例えば、制御部４は、電池モジュール２−１が過充電状態又は過放電状態であることを判断することにより、電池モジュール２−１の異常を検出する。また、制御部４は、電池モジュール２−１が異常である旨を制御部４以外の制御部から受信することにより、電池モジュール２−１の異常を検出してもよい。   Moreover, the control part 4 performs an abnormality detection process with respect to each battery module 2 for every control timing during charge. For example, the control unit 4 detects an abnormality of the battery module 2-1 by determining that the battery module 2-1 is in an overcharged state or an overdischarged state. Further, the control unit 4 may detect an abnormality of the battery module 2-1 by receiving from the control unit other than the control unit 4 that the battery module 2-1 is abnormal.

また、制御部４は、充電中、制御タイミング毎に、充電器５から蓄電装置１へ供給される電力（電流）を制御する。例えば、制御部４は、「電流指令値＝電池モジュール２の許容電流×（互いに電気的に接続されている電池モジュール２の数−異常確定前状態の電池モジュール２の数）を計算し、その電流指令値を充電器５へ送信する。充電器５は、受信した電流指令値に応じた電流が充電器５から蓄電装置１へ流れるように、自身の出力電流を制御する。これにより、電流指令値が小さくなると、充電器５から蓄電装置１へ供給される電力（電流）も小さくなる。   In addition, the control unit 4 controls power (current) supplied from the charger 5 to the power storage device 1 at each control timing during charging. For example, the control unit 4 calculates “current command value = allowable current of the battery module 2 × (number of battery modules 2 electrically connected to each other−number of battery modules 2 in a state before the abnormality is determined)” The current command value is transmitted to the charger 5. The charger 5 controls the output current of the charger 5 so that a current corresponding to the received current command value flows from the charger 5 to the power storage device 1. When the command value decreases, the power (current) supplied from the charger 5 to the power storage device 1 also decreases.

また、制御部４は、充電中、各電池モジュール２のうちの少なくとも１つの電池モジュール２が異常確定状態になると、その異常確定状態の電池モジュール２が他の電池モジュール２から電気的に切り離されるように各スイッチ３の動作を制御する。例えば、制御部４は、電池モジュール２−１が異常確定状態になると、電池モジュール２−１に接続されるスイッチ３−１をオンからオフに切り替え、残りのスイッチ３−２〜３−ｎをそれぞれオンのままにする。これにより、異常確定状態の電池モジュール２−１が他の電池モジュール２−２〜２−ｎから電気的に切り離される。   In addition, when at least one of the battery modules 2 is in an abnormality confirmed state during charging, the control unit 4 is electrically disconnected from the other battery modules 2 when the abnormality confirmed state is reached. Thus, the operation of each switch 3 is controlled. For example, when the battery module 2-1 is in an abnormality confirmed state, the control unit 4 switches the switch 3-1 connected to the battery module 2-1 from on to off, and switches the remaining switches 3-2 to 3 -n. Leave each on. Thereby, the battery module 2-1 in the abnormality confirmed state is electrically disconnected from the other battery modules 2-2 to 2-n.

図２は、制御部４の動作の一例を示すフローチャートである。なお、図２に示すフローチャートは、制御タイミング毎に繰り返し行われるものとする。
まず、制御部４は、すべての電池モジュール２に対して異常を検出しない場合（Ｓ２１：Ｎｏ）、互いに電気的に接続されている電池モジュール２の数や異常確定前状態の電池モジュール２の数を変更せずに、充電器５から蓄電装置１へ供給される電力（電流）を制御する（Ｓ２２）。 FIG. 2 is a flowchart showing an example of the operation of the control unit 4. Note that the flowchart shown in FIG. 2 is repeatedly performed at each control timing.
First, when the controller 4 does not detect any abnormality for all the battery modules 2 (S21: No), the number of the battery modules 2 that are electrically connected to each other or the number of the battery modules 2 in the state before the abnormality is determined. The power (current) supplied from the charger 5 to the power storage device 1 is controlled without changing (S22).

また、制御部４は、各電池モジュール２のうちの少なくとも１つの電池モジュール２に対して異常を検出し（Ｓ２１：Ｙｅｓ）、その電池モジュール２に対応する異常カウンタの値（電池モジュール２の異常を検出した回数）をインクリメントする（Ｓ２３）。また、制御部４は、その異常カウンタの値が異常確定閾値及び異常確定前閾値以下である場合（Ｓ２４：Ｎｏ、Ｓ２５：Ｎｏ）、互いに電気的に接続されている電池モジュール２の数や異常確定前状態の電池モジュール２の数を変更せずに、充電器５から蓄電装置１へ供給される電力（電流）を制御する（Ｓ２２）。   Further, the control unit 4 detects an abnormality in at least one battery module 2 among the battery modules 2 (S21: Yes), and the value of the abnormality counter corresponding to the battery module 2 (abnormality of the battery module 2). Is incremented) (S23). In addition, when the value of the abnormality counter is equal to or less than the abnormality confirmation threshold value and the threshold value before abnormality confirmation (S24: No, S25: No), the control unit 4 determines the number of battery modules 2 that are electrically connected to each other and abnormality. The power (current) supplied from the charger 5 to the power storage device 1 is controlled without changing the number of the battery modules 2 in the state before confirmation (S22).

一方、制御部４は、各電池モジュール２のうちの少なくとも１つの電池モジュール２に対して異常を検出し（Ｓ２１：Ｙｅｓ）、その電池モジュール２に対応する異常カウンタの値（電池モジュール２の異常を検出した回数）をインクリメントする（Ｓ２３）。また、制御部４は、その異常カウンタの値が異常確定閾値以下で、かつ、異常確定前閾値よりも大きい場合（Ｓ２４：Ｎｏ、Ｓ２５：Ｙｅｓ）、その電池モジュール２の状態を「正常状態」から「異常確定前状態」に変更し（Ｓ２６）、異常確定前状態の電池モジュール２の数を変更して充電器５から蓄電装置１へ供給される電力（電流）を制御する（Ｓ２７）。   On the other hand, the control unit 4 detects an abnormality in at least one of the battery modules 2 (S21: Yes), and the value of the abnormality counter corresponding to the battery module 2 (abnormality of the battery module 2). Is incremented) (S23). Further, when the value of the abnormality counter is equal to or less than the abnormality confirmation threshold value and greater than the threshold value before abnormality confirmation (S24: No, S25: Yes), the control unit 4 sets the state of the battery module 2 to “normal state”. Is changed to “pre-abnormal state” (S26), the number of battery modules 2 in the pre-abnormal state is changed, and the power (current) supplied from the charger 5 to the power storage device 1 is controlled (S27).

また、制御部４は、各電池モジュール２のうちの少なくとも１つの電池モジュール２に対して異常を検出し（Ｓ２１：Ｙｅｓ）、その電池モジュール２に対応する異常カウンタの値をインクリメントする（Ｓ２３）。また、制御部４は、その異常カウンタの値が異常確定閾値よりも大きい場合（Ｓ２４：Ｙｅｓ）、その電池モジュール２の状態を「異常確定前状態」から「異常確定状態」に変更し（Ｓ２８）、互いに電気的に接続されている電池モジュール２の数や異常確定前状態の電池モジュール２の数を変更して充電器５から蓄電装置１へ供給される電力（電流）を制御し（Ｓ２９）、異常確定状態の電池モジュール２が他の電池モジュール２から切り離されるように各スイッチ３の動作を制御する（Ｓ３０）。   Further, the control unit 4 detects an abnormality in at least one of the battery modules 2 (S21: Yes), and increments the value of the abnormality counter corresponding to the battery module 2 (S23). . Further, when the value of the abnormality counter is larger than the abnormality confirmation threshold value (S24: Yes), the control unit 4 changes the state of the battery module 2 from the “state before abnormality confirmation” to the “abnormality confirmation state” (S28). ), The power (current) supplied from the charger 5 to the power storage device 1 is controlled by changing the number of battery modules 2 electrically connected to each other and the number of battery modules 2 in a state before the abnormality is determined (S29). ), The operation of each switch 3 is controlled so that the battery module 2 in the abnormality confirmed state is disconnected from the other battery modules 2 (S30).

例えば、蓄電装置１に備えられる、すべての電池モジュール２−１〜２−５に対して異常が検出されない場合を想定する。なお、電池モジュール２の許容電流を４０［Ａ］とする。   For example, the case where abnormality is not detected with respect to all the battery modules 2-1 to 2-5 with which the electrical storage apparatus 1 is equipped is assumed. The allowable current of the battery module 2 is 40 [A].

この場合、制御部４は、「電流指令値＝電池モジュール２の許容電流：４０［Ａ］×（互いに電気的に接続されている電池モジュール２の数：「５」−異常確定前状態の電池モジュール２の数：「０」）」を計算することにより電流指令値：２００［Ａ］を求める。充電器５から蓄電装置１へは２００［Ａ］の電流が流れ、各電池モジュール２−１〜２−５には、それぞれ、許容電流を超えない４０［Ａ］の電流が流れる。   In this case, the control unit 4 determines that “current command value = allowable current of the battery module 2: 40 [A] × (number of battery modules 2 electrically connected to each other:“ 5 ”—battery in a state before the abnormality is determined. The current command value: 200 [A] is obtained by calculating the number of modules 2: “0”). A current of 200 [A] flows from the charger 5 to the power storage device 1, and a current of 40 [A] that does not exceed the allowable current flows through each of the battery modules 2-1 to 2-5.

次の制御タイミングにおいて、例えば、電池モジュール２−１〜２−５のうちの電池モジュール２−１に対して、異常が検出される場合を想定する。なお、異常確定前閾値を「０」とする。   At the next control timing, for example, a case is assumed in which an abnormality is detected for the battery module 2-1 of the battery modules 2-1 to 2-5. The threshold value before abnormality determination is set to “0”.

この場合、制御部４は、電池モジュール２−１に対応する異常カウンタの値を「０」から「１」にインクリメントし、その異常カウンタの値が異常確定前閾値よりも大きくなると、電池モジュール２−１の状態を「正常状態」から「異常確定前状態」に変更し、異常確定前状態の電池モジュール２の数を「０」から「１」に変更し、「電流指令値＝電池モジュール２の許容電流：４０［Ａ］×（互いに電気的に接続されている電池モジュール２の数：「５」−異常確定前状態の電池モジュール２の数：「１」）を計算することにより電流指令値：１６０［Ａ］を求める。充電器５から蓄電装置１へは、１６０［Ａ］の電流が流れ、各電池モジュール２−１〜２−５には、それぞれ、許容電流を超えない３２［Ａ］の電流が流れる。   In this case, the control unit 4 increments the value of the abnormality counter corresponding to the battery module 2-1 from “0” to “1”, and when the value of the abnormality counter becomes larger than the threshold value before abnormality determination, the battery module 2. −1 is changed from “normal state” to “pre-abnormal state”, the number of battery modules 2 in the pre-abnormal state is changed from “0” to “1”, and “current command value = battery module 2” Allowable current: 40 [A] × (number of battery modules 2 electrically connected to each other: “5” −number of battery modules 2 in a state before the abnormality is determined: “1”) Value: 160 [A] is obtained. A current of 160 [A] flows from the charger 5 to the power storage device 1, and a current of 32 [A] that does not exceed the allowable current flows through each of the battery modules 2-1 to 2-5.

さらに次の制御タイミングにおいて、例えば、継続して、電池モジュール２−１に対して、異常が検出される場合を想定する。なお、異常確定閾値を「１」とする。
この場合、制御部４は、電池モジュール２−１に対応する異常カウンタの値を「１」から「２」にインクリメントし、その異常カウンタの値が異常確定閾値よりも大きくなると、電池モジュール２−１の状態を「異常確定前状態」から「異常確定状態」に変更し、互いに電気的に接続されている電池モジュール２の数を「５」から「４」に変更するとともに、異常確定前状態の電池モジュール２の数を「１」から「０」に変更し、「電流指令値＝電池モジュール２の許容電流：４０［Ａ］×（互いに電気的に接続されている電池モジュール２の数：「４」−異常確定前状態の電池モジュール２の数：「０」）を計算することにより電流指令値：１６０［Ａ］を求める。充電器５から蓄電装置１へは、電池モジュール２−１が切り離される直前と同様に、１６０［Ａ］の電流が流れ、各電池モジュール２−２〜２−５には、それぞれ、許容電流を超えない４０［Ａ］の電流が流れる。 Furthermore, at the next control timing, for example, it is assumed that an abnormality is continuously detected for the battery module 2-1. The abnormality confirmation threshold is “1”.
In this case, the control unit 4 increments the value of the abnormality counter corresponding to the battery module 2-1 from “1” to “2”, and when the value of the abnormality counter becomes larger than the abnormality determination threshold, the battery module 2-2. 1 is changed from “pre-abnormal state” to “abnormal state”, the number of battery modules 2 electrically connected to each other is changed from “5” to “4”, The number of battery modules 2 is changed from “1” to “0”, and “current command value = allowable current of battery module 2: 40 [A] × (number of battery modules 2 electrically connected to each other: The current command value: 160 [A] is obtained by calculating “4” —the number of battery modules 2 in the state before the abnormality is determined: “0”). 160 [A] current flows from the charger 5 to the power storage device 1 just before the battery module 2-1 is disconnected, and each battery module 2-2 to 2-5 has a permissible current. A current of 40 [A] not exceeding flows.

なお、上記実施例では、異常確定前閾値を「０」に設定しているが、異常確定前閾値を「１」以上に設定してもよい。異常確定前閾値を「１」以上に設定することにより、ある電池モジュール２に対して、正常状態であるにもかかわらず異常が検出されて異常カウンタの値がインクリメントされてしまっても、その電池モジュール２の状態が「正常状態」から「異常確定前状態」に変更され難くなるため、異常の誤検出による充電器５から蓄電装置１への電力低下を抑えることができる。   In the above-described embodiment, the threshold before abnormality determination is set to “0”, but the threshold before abnormality determination may be set to “1” or more. By setting the threshold value before abnormality determination to “1” or more, even if an abnormality is detected for a certain battery module 2 even though it is in a normal state, the value of the abnormality counter is incremented. Since it is difficult for the state of the module 2 to be changed from the “normal state” to the “pre-abnormal state”, it is possible to suppress a reduction in power from the charger 5 to the power storage device 1 due to erroneous detection of abnormality.

このように、実施形態の蓄電装置１では、異常確定状態の電池モジュール２が他の電池モジュール２から切り離される前において、異常確定前状態の電池モジュール２の数の分だけ、充電器５から蓄電装置１へ供給される電力（電流）を小さくさせている。これにより、充電器５から蓄電装置１へ供給される電力（電流）が変化するタイミングが、異常確定状態の電池モジュール２が他の電池モジュール２から切り離されるタイミングよりも遅れる場合でも、各電池モジュール２に許容電流を超える電流が流れないようにすることができる。   As described above, in the power storage device 1 of the embodiment, before the battery module 2 in the abnormality confirmed state is disconnected from the other battery modules 2, the battery 5 is charged by the number of the battery modules 2 in the state before the abnormality confirmed. The electric power (current) supplied to the device 1 is reduced. Thereby, even when the timing at which the electric power (current) supplied from the charger 5 to the power storage device 1 changes is delayed from the timing at which the battery module 2 in the abnormality confirmed state is disconnected from the other battery modules 2, each battery module It is possible to prevent a current exceeding the allowable current from flowing through 2.

１ 蓄電装置
２ 電池モジュール
３ スイッチ
４ 制御部
５ 充電器
1 Power Storage Device 2 Battery Module 3 Switch 4 Control Unit 5 Charger

Claims (3)

並列接続される複数の電池モジュールを備える蓄電装置であって、
前記複数の電池モジュールにそれぞれ接続されるスイッチと、
前記複数の電池モジュールのうちの少なくとも１つの電池モジュールの状態が異常確定前状態になると、充電器から当該蓄電装置へ供給される電力を小さくさせ、前記異常確定前状態の電池モジュールが異常確定状態になると、前記異常確定状態の電池モジュールが他の電池モジュールから電気的に切り離されるように前記スイッチの動作を制御する制御部と、
を備えることを特徴とする蓄電装置。 A power storage device comprising a plurality of battery modules connected in parallel,
A switch connected to each of the plurality of battery modules;
When the state of at least one of the plurality of battery modules is in a pre-abnormal state, the power supplied from the charger to the power storage device is reduced, and the battery module in the pre-abnormal state is in an abnormal state Then, a control unit that controls the operation of the switch so that the battery module in the abnormality confirmed state is electrically disconnected from other battery modules;
A power storage device comprising: 請求項１に記載の蓄電装置であって、
前記制御部は、電流指令値＝前記電池モジュールの許容電流×（互いに電気的に接続されている前記電池モジュールの数−前記異常確定前状態の電池モジュールの数）を計算して前記電流指令値を求めることにより、前記充電器から当該蓄電装置へ供給される電力を制御する
ことを特徴とする蓄電装置。 The power storage device according to claim 1,
The control unit calculates current command value = allowable current of the battery module × (number of battery modules electrically connected to each other−number of battery modules in a state before the abnormality is determined) to calculate the current command value. The power storage device is characterized by controlling power supplied from the charger to the power storage device. 請求項１又は請求項２に記載の蓄電装置であって、
前記制御部は、前記電池モジュールの異常を検出した回数が、異常確定前閾値よりも大きい場合、その電池モジュールを前記異常確定前状態にする
ことを特徴とする蓄電装置。
The power storage device according to claim 1 or 2,
When the number of times that the abnormality of the battery module is detected is larger than a threshold value before abnormality determination, the control unit sets the battery module to the state before abnormality determination.
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