JP6862732B2 - Detection device, detection method, power storage system and program - Google Patents

Detection device, detection method, power storage system and program Download PDF

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JP6862732B2
JP6862732B2 JP2016181841A JP2016181841A JP6862732B2 JP 6862732 B2 JP6862732 B2 JP 6862732B2 JP 2016181841 A JP2016181841 A JP 2016181841A JP 2016181841 A JP2016181841 A JP 2016181841A JP 6862732 B2 JP6862732 B2 JP 6862732B2
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弥 仲松
弥 仲松
洋幸 長野
洋幸 長野
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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
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Description

本発明は、検出装置、検出方法、蓄電システムおよびプログラムに関する。 The present invention relates to a detection device, a detection method, a power storage system and a program.

複数の蓄電池を具備した蓄電システムにおいて、蓄電池の電圧測定回路内の抵抗値が増加することを原因として、システム停止や容量の低下が生じることがある。その抵抗値の増加を、定電流定電圧（ＣＣ−ＣＶ）充電時の電圧値を用いて検出する方法が考えられている（例えば、特許文献１参照。）。特許文献１に記載の検出方法では、ＣＣ充電時の電圧上昇速度があらかじめ設定された基準値よりも大きく、ＣＶ充電後の開回路電圧値があらかじめ設定された基準値よりも小さな場合に抵抗値の増加を判定する。 In a power storage system including a plurality of storage batteries, the system may be stopped or the capacity may be reduced due to an increase in the resistance value in the voltage measurement circuit of the storage batteries. A method of detecting the increase in the resistance value by using the voltage value at the time of constant current constant voltage (CC-CV) charging has been considered (see, for example, Patent Document 1). In the detection method described in Patent Document 1, the resistance value is obtained when the voltage rise rate during CC charging is larger than the preset reference value and the open circuit voltage value after CV charging is smaller than the preset reference value. Judge the increase in.

特開２０１１−２５７４１１号公報Japanese Unexamined Patent Publication No. 2011-257411

特許文献１に記載されたような方法では、充電開始時から充電終了後まで抵抗値の測定が必要となる。さらに、充電終了後の開回路電圧の測定も必要となり、長い期間における測定が必要となってしまうという問題点がある。さらに、抵抗値の増加を判定するタイミングが充電終了時以降に限定されるため、充電中に過充電の誤検出等の不具合が生じても、それを充電中に検出することはできないという問題点がある。 In the method as described in Patent Document 1, it is necessary to measure the resistance value from the start of charging to the end of charging. Further, it is necessary to measure the open circuit voltage after the charging is completed, and there is a problem that the measurement is required for a long period of time. Furthermore, since the timing for determining the increase in resistance value is limited to after the end of charging, even if a problem such as erroneous detection of overcharging occurs during charging, it cannot be detected during charging. There is.

本発明の目的は、上述した課題を解決する検出装置、検出方法、蓄電システムおよびプログラムを提供することである。 An object of the present invention is to provide a detection device, a detection method, a power storage system, and a program that solve the above-mentioned problems.

本発明の検出装置は、
複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する監視部と、
前記複数の蓄電池のうち、前記監視部が測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに前記監視部が測定した電流値と所定の比較電圧値および比較電流値とに基づいて抵抗値を算出し、該算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する判定部とを有する。
また、本発明の検出方法は、
複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する処理と、
前記複数の蓄電池のうち、前記測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに測定した電流値と所定の比較電圧値および比較電流値とに基づいて抵抗値を算出する処理と、
前記算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する処理とを行う。
また、本発明の蓄電システムは、
複数の蓄電池と、
前記複数の蓄電池の抵抗値を検出する検出装置とを有し、
前記検出装置は、
前記複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する監視部と、
前記複数の蓄電池のうち、前記監視部が測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに前記監視部が測定した電流値と所定の比較電圧値および比較電流値とに基づいて前記抵抗値を算出し、該算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する判定部とを有する。
また、本発明のプログラムは、
コンピュータに実行させるためのプログラムであって、
複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する手順と、
前記複数の蓄電池のうち、前記測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに測定した電流値と所定の比較電圧値および比較電流値とに基づいて抵抗値を算出する手順と、
前記算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する手順とを実行させる。 The detection device of the present invention
When a plurality of storage batteries are charged with a constant current and a constant voltage, a monitoring unit that measures the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and a monitoring unit.
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the voltage value of the predetermined storage battery measured by the monitoring unit becomes maximum, and the voltage value of the predetermined storage battery measured by the monitoring unit at that time. A resistance value is calculated based on the current value, a predetermined comparative voltage value, and a comparative current value, and it is determined whether or not the resistance value is increased based on the calculated resistance value and the predetermined resistance threshold value. It has a determination unit.
Moreover, the detection method of this invention
When charging a plurality of storage batteries with constant current and constant voltage, a process of measuring the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the measured voltage value of the predetermined storage battery becomes maximum, the current value measured at that time, and the predetermined comparison voltage. The process of calculating the resistance value based on the value and the comparison current value, and
Based on the calculated resistance value and a predetermined resistance threshold value, a process of determining whether or not the resistance value is increasing is performed.
Further, the power storage system of the present invention is
With multiple storage batteries
It has a detection device that detects the resistance value of the plurality of storage batteries.
The detection device is
When the plurality of storage batteries are charged with constant current and constant voltage, a monitoring unit that measures the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and a monitoring unit.
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the voltage value of the predetermined storage battery measured by the monitoring unit becomes maximum, and the voltage value of the predetermined storage battery measured by the monitoring unit at that time. The resistance value is calculated based on the current value, the predetermined comparative voltage value, and the comparative current value, and it is determined whether or not the resistance value is increased based on the calculated resistance value and the predetermined resistance threshold value. It has a determination unit to be used.
In addition, the program of the present invention
A program that lets a computer run
When charging a plurality of storage batteries with constant current and constant voltage, a procedure for measuring the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the measured voltage value of the predetermined storage battery becomes maximum, the current value measured at that time, and the predetermined comparison voltage. The procedure for calculating the resistance value based on the value and the comparison current value, and
Based on the calculated resistance value and the predetermined resistance threshold value, the procedure for determining whether or not the resistance value is increasing is executed.

以上説明したように、本発明においては、充電中の短い期間に測定した測定値を用いて抵抗値の増加を検出することができる。 As described above, in the present invention, an increase in the resistance value can be detected by using the measured value measured in a short period during charging.

本発明の検出装置を用いた蓄電システムの第１の実施の形態を示す図である。It is a figure which shows the 1st Embodiment of the power storage system using the detection device of this invention. 図１に示した検出装置の内部構成の一例を示す図である。It is a figure which shows an example of the internal structure of the detection apparatus shown in FIG. 図１に示した蓄電システムにおける抵抗値増加の検出方法の一例を説明するためのフローチャートである。It is a flowchart for demonstrating an example of the detection method of the resistance value increase in the power storage system shown in FIG. 本発明の検出装置を用いた蓄電システムの第２の実施の形態を示す図である。It is a figure which shows the 2nd Embodiment of the power storage system using the detection device of this invention. 図４に示した検出装置の内部構成の一例を示す図である。It is a figure which shows an example of the internal structure of the detection apparatus shown in FIG. 正常時における、定電流定電圧充電を行っている蓄電池の電圧値および電流値の時間的変化の一例を示す図である。It is a figure which shows an example of the time change of the voltage value and the current value of the storage battery which performs a constant current constant voltage charge in a normal state. 抵抗値増加が生じた場合の、定電流定電圧充電を行っている蓄電池の電圧値および電流値の時間的変化の一例を示す図である。It is a figure which shows an example of the temporal change of the voltage value and the current value of the storage battery which performs a constant current constant voltage charge when a resistance value increase occurs. 図５に示した判定部における抵抗値の算出方法を説明するための図である。It is a figure for demonstrating the calculation method of the resistance value in the determination part shown in FIG. 図４に示した蓄電システムにおける抵抗値増加の検出方法の一例を説明するためのフローチャートである。It is a flowchart for demonstrating an example of the detection method of the resistance value increase in the power storage system shown in FIG.

以下に本発明の実施の形態について図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

本発明を適用する蓄電システムは、複数の蓄電モジュールが、少なくとも一部が直列に接続された構成を有する。また、蓄電システムを構成する各蓄電モジュールは、１以上の蓄電池（電池セル）から構成されるものである。
（第１の実施の形態） The power storage system to which the present invention is applied has a configuration in which a plurality of power storage modules are connected in series at least in part. Further, each power storage module constituting the power storage system is composed of one or more storage batteries (battery cells).
(First Embodiment)

図１は、本発明の検出装置を用いた蓄電システムの第１の実施の形態を示す図である。
本形態は図１に示すように、検出装置１００と、複数の蓄電池２００−１〜２００−３とを有している。なお、図１には、蓄電池２００−１〜２００−３が３つである場合を例に挙げて示しているが、この数に限らない。 FIG. 1 is a diagram showing a first embodiment of a power storage system using the detection device of the present invention.
As shown in FIG. 1, this embodiment has a detection device 100 and a plurality of storage batteries 200-1 to 200-3. Note that FIG. 1 shows an example in which there are three storage batteries 200-1 to 200-3, but the number is not limited to this.

蓄電池２００−１〜２００−３は、充電および放電可能な二次電池である。検出装置１００は、蓄電池２０１−０〜２００−３の電圧値および蓄電池２０１−０〜２００−３に流れる電流値を測定する。なお、蓄電池２００−１〜２００−３それぞれの内部に、自身の電圧値および電流値を測定する機構が設けられている場合、検出装置１００は、それらの測定値を取得する。 The storage batteries 200-1 to 200-3 are secondary batteries that can be charged and discharged. The detection device 100 measures the voltage value of the storage batteries 201-0 to 200-3 and the current value flowing through the storage batteries 201-0 to 200-3. When a mechanism for measuring its own voltage value and current value is provided inside each of the storage batteries 200-1 to 200-3, the detection device 100 acquires those measured values.

図２は、図１に示した検出装置１００の内部構成の一例を示す図である。図１に示した検出装置１００は図２に示すように、監視部１１０と、判定部１２０とを有している。なお、図２には、図１に示した検出装置１００が具備する構成要素のうち、本実施の形態に関わる主要な構成要素の一例を示す。 FIG. 2 is a diagram showing an example of the internal configuration of the detection device 100 shown in FIG. As shown in FIG. 2, the detection device 100 shown in FIG. 1 has a monitoring unit 110 and a determination unit 120. Note that FIG. 2 shows an example of the main components related to the present embodiment among the components included in the detection device 100 shown in FIG.

監視部１１０は、蓄電池２００−１〜２００−３に定電流定電圧充電を行う際、蓄電池２００−１〜２００−３の電圧値それぞれを所定の時間間隔で測定または取得する。また、監視部１１０は、蓄電池２００−１〜２００−３に定電流定電圧充電を行う際、蓄電池２０１−１〜２０１−３に流れる電流値を、電圧値の測定または取得のタイミングと同じタイミングで測定または取得する。このとき、監視部１１０は、蓄電池２００−１〜２００−３から構成される蓄電システム全体における電流値を、電圧値の測定または取得のタイミングと同じタイミングで測定または取得するものであっても良い。
判定部１２０は、蓄電池２００−１〜２００−３のうち、監視部１１０が測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定されたその所定の蓄電池の電圧値と、そのときに監視部１１０が測定した電流値と、所定の比較電圧値および比較電流値とに基づいて抵抗値を算出する。判定部１２０は、算出した抵抗値と所定の抵抗閾値とに基づいて、抵抗値が増加しているか否かを判定する。例えば、判定部１２０は、蓄電池２００−１〜２００−３のうち、所定の蓄電池の電圧値がその所定の蓄電池の電圧値が最大となる時刻を含む所定の期間に測定された値であるかどうかを判定しても良い。具体的に、判定部１２０は、所定の蓄電池の電圧値が所定の期間に測定された値であるか否かの判定に際して、電圧値の変化量の大きさに基づいて判定しても良いし、電圧値の変化を関数でフィッティングすることにより判定しても良い。判定部１２０は、所定の蓄電池の電圧値が所定の期間に測定された値である場合、その電圧値とそのときに監視部１１０が測定した電流値と、所定の比較電圧値および比較電流値とに基づいて抵抗値を算出する。 When the storage batteries 200-1 to 200-3 are charged with a constant current and a constant voltage, the monitoring unit 110 measures or acquires the voltage values of the storage batteries 200-1 to 200-3 at predetermined time intervals. Further, when the monitoring unit 110 charges the storage batteries 200-1 to 200-3 with a constant current and a constant voltage, the monitoring unit 110 sets the current value flowing through the storage batteries 201-1 to 201-3 at the same timing as the timing of measuring or acquiring the voltage value. To measure or obtain at. At this time, the monitoring unit 110 may measure or acquire the current value in the entire power storage system composed of the storage batteries 200-1 to 200-3 at the same timing as the timing of measuring or acquiring the voltage value. ..
The determination unit 120 is the voltage value of the predetermined storage battery measured in a predetermined period including the time when the voltage value of the predetermined storage battery measured by the monitoring unit 110 is maximum among the storage batteries 200-1 to 200-3. , The resistance value is calculated based on the current value measured by the monitoring unit 110 at that time and the predetermined comparison voltage value and comparison current value. The determination unit 120 determines whether or not the resistance value is increasing based on the calculated resistance value and the predetermined resistance threshold value. For example, is the determination unit 120 a value measured in a predetermined period including the time when the voltage value of the predetermined storage battery becomes the maximum among the storage batteries 200-1 to 200-3? You may judge whether or not. Specifically, the determination unit 120 may determine whether or not the voltage value of the predetermined storage battery is a value measured in a predetermined period based on the magnitude of the amount of change in the voltage value. , The change in the voltage value may be determined by fitting with a function. When the voltage value of the predetermined storage battery is a value measured in a predetermined period, the determination unit 120 determines the voltage value, the current value measured by the monitoring unit 110 at that time, and the predetermined comparison voltage value and the comparison current value. The resistance value is calculated based on.

以下に、図１に示した蓄電システムにおける抵抗値増加の検出方法について説明する。図３は、図１に示した蓄電システムにおける抵抗値増加の検出方法の一例を説明するためのフローチャートである。 Hereinafter, a method for detecting an increase in resistance value in the power storage system shown in FIG. 1 will be described. FIG. 3 is a flowchart for explaining an example of a method for detecting an increase in resistance value in the power storage system shown in FIG.

まず、蓄電池２００−１〜２００−３に対して定電流定電圧充電を開始する（ステップＳ１）。すると、監視部１１０は、蓄電池２００−１〜２００−３の電圧値それぞれを、また蓄電池２００−１〜２００−３に流れる電流値を所定の時間間隔で測定する（ステップＳ２）。
続いて、判定部１２０は、蓄電池２００−１〜２００−３のうち、監視部１１０が測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間に測定された値であるかどうかを判定する（ステップＳ３）。所定の蓄電池の電圧値が所定の期間に測定された値である場合、判定部１２０は、その電圧値とそのときに監視部１１０が測定した電流値と、所定の比較電圧値および比較電流値とに基づいて抵抗値を算出する（ステップＳ４）。続いて、判定部１２０は、算出した抵抗値とあらかじめ設定された抵抗閾値とに基づいて、抵抗値が増加しているか否かを判定する（ステップＳ５）。 First, constant current and constant voltage charging is started for the storage batteries 200-1 to 200-3 (step S1). Then, the monitoring unit 110 measures each of the voltage values of the storage batteries 200-1 to 200-3 and the current value flowing through the storage batteries 200-1 to 200-3 at predetermined time intervals (step S2).
Subsequently, the determination unit 120 determines whether or not the value is measured in a predetermined period including the time when the voltage value of the predetermined storage battery measured by the monitoring unit 110 is maximum among the storage batteries 200-1 to 200-3. Is determined (step S3). When the voltage value of the predetermined storage battery is a value measured in a predetermined period, the determination unit 120 determines the voltage value, the current value measured by the monitoring unit 110 at that time, and the predetermined comparison voltage value and comparison current value. The resistance value is calculated based on (step S4). Subsequently, the determination unit 120 determines whether or not the resistance value is increasing based on the calculated resistance value and the preset resistance threshold value (step S5).

このように、監視部が測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定されたその所定の蓄電池の電圧値および電流値と、所定の比較電圧値および比較電流値とに基づいて抵抗値を算出し、その抵抗値と所定の抵抗閾値とを比較して、抵抗値が増加しているかどうかを判定する。そのため、充電中の短い期間に測定した測定値を用いて抵抗値の増加を検出することができる。
（第２の実施の形態） In this way, the voltage value and current value of the predetermined storage battery measured in the predetermined period including the time when the voltage value of the predetermined storage battery measured by the monitoring unit becomes maximum, and the predetermined comparison voltage value and comparison current value. The resistance value is calculated based on the above, and the resistance value is compared with a predetermined resistance threshold to determine whether or not the resistance value is increasing. Therefore, the increase in resistance value can be detected by using the measured value measured in a short period during charging.
(Second Embodiment)

図４は、本発明の検出装置を用いた蓄電システムの第２の実施の形態を示す図である。
本形態は図４に示すように、検出装置１０１と、複数の蓄電池２０１−１〜２０１−３とを有している。なお、図４には、蓄電池２０１−１〜２０１−３が３つである場合を例に挙げて示しているが、この数に限らない。 FIG. 4 is a diagram showing a second embodiment of a power storage system using the detection device of the present invention.
As shown in FIG. 4, this embodiment has a detection device 101 and a plurality of storage batteries 201-1 to 201-3. Note that FIG. 4 shows an example in which there are three storage batteries 201-1 to 201-3, but the number is not limited to this.

蓄電池２０１−１〜２０１−３は、充電および放電可能な二次電池である。検出装置１０１は、蓄電池２０１−１〜２０１−３の電圧値および蓄電池２０１−１〜２０１−３に流れる電流値を測定する。なお、蓄電池２０１−１〜２０１−３それぞれの内部に、自身の電圧値および電流値を測定する機構が設けられている場合、検出装置１０１は、それらの測定値を取得する。 The storage batteries 201-1 to 201-3 are secondary batteries that can be charged and discharged. The detection device 101 measures the voltage value of the storage batteries 201-1 to 201-3 and the current value flowing through the storage batteries 201-1 to 201-3. If a mechanism for measuring its own voltage value and current value is provided inside each of the storage batteries 201-1 to 201-3, the detection device 101 acquires those measured values.

図５は、図４に示した検出装置１０１の内部構成の一例を示す図である。図４に示した検出装置１０１は図５に示すように、監視部１１１と、判定部１２１と、記憶部１３１とを有している。なお、図５には、図４に示した検出装置１０１が具備する構成要素のうち、本実施の形態に関わる主要な構成要素の一例を示す。 FIG. 5 is a diagram showing an example of the internal configuration of the detection device 101 shown in FIG. As shown in FIG. 5, the detection device 101 shown in FIG. 4 has a monitoring unit 111, a determination unit 121, and a storage unit 131. Note that FIG. 5 shows an example of the main components related to the present embodiment among the components included in the detection device 101 shown in FIG.

監視部１１１は、蓄電池２０１−１〜２０１−３に定電流定電圧充電を行う際、蓄電池２０２−１〜２０２−３の電圧値それぞれを所定の時間間隔で測定または取得する。また、監視部１１１は、蓄電池２０１−１〜２０１−３に定電流定電圧充電を行う際、蓄電池２０２−１〜２０２−３に流れる電流値を、電圧値の測定または取得のタイミングと同じタイミングで測定または取得する。このとき、監視部１１１は、蓄電池２０１−１〜２０１−３から構成される蓄電システム全体における電流値を、電圧値の測定または取得のタイミングと同じタイミングで測定または取得するものであっても良い。
記憶部１３１は、監視部１１１が測定または取得した電圧値と電流値とを対応付けて記憶する。このとき記憶部１３１は、それらの電圧値および電流値を監視部１１１が測定した時刻も対応付けて記憶するものであっても良い。また、記憶部１３１は、監視部１１１が測定または取得した電圧値および電流値をすべて記憶する必要はなく、判定部１２１が記憶部１３１に対して書き込みを行った電圧値および電流値を記憶すれば良い。
判定部１２１は、蓄電池２０１−１〜２０１−３のうち、監視部１１１が測定した電圧値が最大である蓄電池（最大蓄電池）の電圧値が所定の期間に測定された値であるかどうかを判定する。
ここで「所定の期間」とは、最大蓄電池の電圧値が最大値となる点を含む期間である。この「期間」は、蓄電システムの充電電流や充電レートなどに応じて設定される。この「期間」は、例えば、充電レートが０．３Ｃ、充電電流が１０Ａの蓄電システムでは、電圧値が最大値をとる時刻の前後３分間と設定されるものであっても良い。また、この「期間」は、この期間内のどの時刻に測定された電圧値および電流値を用いて抵抗値を算出しても、その抵抗値が、セル電圧値が最大値を記録する時刻に測定された電圧値および電流値を用いて算出した抵抗値と比べて大きく変化しないように設定される。例えば、セル電圧値が最大値を記録する時刻以降、セル電圧値とともに充電電流も減少するため、抵抗値の変化はセル電圧値が最大値を記録する時刻以前よりも小さい。そのため、電圧の最大値を記録する以降の時刻に関しては、より大きく範囲をとってもよい。例えば、充電レートが０．３Ｃ、充電電流が１０Ａの蓄電システムの場合では、期間はセル電圧値が最大値をとる時刻の前３分間および後１０分間としても良い。
判定部１２１は、蓄電池２０１−１〜２０１−３のうち、監視部１１１が測定した電圧値が最大である蓄電池（最大蓄電池）の電圧値が所定の期間に測定された値である場合、その電圧値（Ｖｃｃ）とそのときに監視部１１１が測定した電流値（Ｉｃｃ）とを記憶部１３１に書き込む。このとき、ＶｃｃおよびＩｃｃは、最大蓄電池の電圧値が最大値となる点を含む期間に測定された電圧値および電流値であれば、どの電圧値および電流値であっても良い。その後、判定部１２１は、監視部１１１が測定した電流値があらかじめ設定された電流値（Ｉｃｖ：比較電流値）以下であるかどうかを判定する。判定部１２１は、最大蓄電池の電圧値が所定の期間に測定された値であるか否かの判定に際して、電圧値の変化量の大きさに基づいて判定しても良いし、電圧値の変化を関数でフィッティングすることにより判定しても良い。判定部１２１は、監視部１１１が測定した電流値がＩｃｖ以下である場合、監視部１１１がその電流値を測定したときに測定した電圧値（Ｖｃｖ：比較電圧値）とＶｃｃとＩｃｖとＩｃｖとを用いて、最大蓄電池の抵抗値を算出する。この抵抗値の算出方法について、具体的に説明する。 When the storage batteries 201-1 to 201-3 are charged with a constant current and a constant voltage, the monitoring unit 111 measures or acquires the voltage values of the storage batteries 202-1 to 202-3 at predetermined time intervals. Further, when the monitoring unit 111 charges the storage batteries 201-1 to 201-3 with a constant current and constant voltage, the monitoring unit 111 sets the current value flowing through the storage batteries 202-1 to 202-3 at the same timing as the timing of measuring or acquiring the voltage value. To measure or obtain at. At this time, the monitoring unit 111 may measure or acquire the current value in the entire power storage system composed of the storage batteries 201-1 to 201-3 at the same timing as the timing of measuring or acquiring the voltage value. ..
The storage unit 131 stores the voltage value measured or acquired by the monitoring unit 111 in association with the current value. At this time, the storage unit 131 may store the voltage value and the current value in association with the time measured by the monitoring unit 111. Further, the storage unit 131 does not need to store all the voltage values and current values measured or acquired by the monitoring unit 111, and stores the voltage value and current value written by the determination unit 121 to the storage unit 131. Just do it.
The determination unit 121 determines whether or not the voltage value of the storage battery (maximum storage battery) having the maximum voltage value measured by the monitoring unit 111 among the storage batteries 201-1 to 201-3 is the value measured in a predetermined period. judge.
Here, the "predetermined period" is a period including a point where the voltage value of the maximum storage battery becomes the maximum value. This "period" is set according to the charging current and charging rate of the power storage system. This "period" may be set to 3 minutes before and after the time when the voltage value reaches the maximum value in the power storage system having a charging rate of 0.3C and a charging current of 10A, for example. In addition, this "period" is the time when the cell voltage value records the maximum value regardless of the time at which the voltage value and current value measured are calculated. It is set so that it does not change significantly compared to the resistance value calculated using the measured voltage value and current value. For example, after the time when the cell voltage value records the maximum value, the charging current decreases with the cell voltage value, so that the change in the resistance value is smaller than before the time when the cell voltage value records the maximum value. Therefore, a larger range may be taken for the time after the maximum value of the voltage is recorded. For example, in the case of a power storage system having a charging rate of 0.3C and a charging current of 10A, the period may be 3 minutes before and 10 minutes after the time when the cell voltage value reaches the maximum value.
When the voltage value of the storage battery (maximum storage battery) having the maximum voltage value measured by the monitoring unit 111 among the storage batteries 201-1 to 201-3 is the value measured in a predetermined period, the determination unit 121 measures the voltage value. The voltage value (Vcc) and the current value (Icc) measured by the monitoring unit 111 at that time are written in the storage unit 131. At this time, Vcc and Icc may be any voltage value and current value as long as they are voltage values and current values measured during the period including the point where the voltage value of the maximum storage battery becomes the maximum value. After that, the determination unit 121 determines whether or not the current value measured by the monitoring unit 111 is equal to or less than a preset current value (Icv: comparative current value). The determination unit 121 may determine whether or not the voltage value of the maximum storage battery is a value measured in a predetermined period based on the magnitude of the amount of change in the voltage value, or the change in the voltage value. May be determined by fitting with a function. When the current value measured by the monitoring unit 111 is Icv or less, the determination unit 121 determines the voltage value (Vcv: comparative voltage value), Vcc, Icv, and Icv measured when the monitoring unit 111 measures the current value. Is used to calculate the resistance value of the maximum storage battery. The method of calculating this resistance value will be specifically described.

図６は、正常時における、定電流定電圧充電を行っている蓄電池の電圧値および電流値の時間的変化の一例を示す図である。図６に示すように、まず定電流充電が行われ、蓄電池の電圧値が一定の電圧値になると、定電圧充電が行われる。このとき、複数の充電池は互いに電圧値の差があるため、そのうち、電圧値が最大である最大蓄電池と、電圧値が最小である最小蓄電池とが存在する。図６では、最大蓄電池の電圧値を「最大セル電圧値」と示し、最小蓄電池の電圧値を「最小セル電圧値」と示す。抵抗値が増加した蓄電池の電圧は、充電時に電圧降下分の影響で大きくなる。そのため、蓄電システムの充電時における最大セル電圧値は、その蓄電池の電圧値になる。 FIG. 6 is a diagram showing an example of a time change of a voltage value and a current value of a storage battery that is being charged with a constant current and a constant voltage in a normal state. As shown in FIG. 6, constant current charging is performed first, and when the voltage value of the storage battery reaches a constant voltage value, constant voltage charging is performed. At this time, since the plurality of rechargeable batteries have a difference in voltage value from each other, there are a maximum storage battery having the maximum voltage value and a minimum storage battery having the minimum voltage value. In FIG. 6, the voltage value of the maximum storage battery is indicated by “maximum cell voltage value”, and the voltage value of the minimum storage battery is indicated by “minimum cell voltage value”. The voltage of the storage battery whose resistance value has increased increases due to the influence of the voltage drop during charging. Therefore, the maximum cell voltage value at the time of charging the power storage system is the voltage value of the storage battery.

図７は、抵抗値増加が生じた場合の、定電流定電圧充電を行っている蓄電池の電圧値および電流値の時間的変化の一例を示す図である。図７に示すように、図６に示したものと比べて、電流が流れているときの最大セル電圧値と最小セル電圧値との差が大きくなる。特に充電末期では、ＳＯＣ（Ｓｔａｔｅ Ｏｆ Ｃｈａｒｇｅ）の変化に起因した電圧値の変化が小さくなり、内部抵抗値に起因した電圧降下の寄与が大きくなる。 FIG. 7 is a diagram showing an example of temporal changes in the voltage value and the current value of the storage battery performing constant current constant voltage charging when the resistance value increases. As shown in FIG. 7, the difference between the maximum cell voltage value and the minimum cell voltage value when a current is flowing is larger than that shown in FIG. In particular, at the end of charging, the change in the voltage value due to the change in SOC (State Of Charge) becomes small, and the contribution of the voltage drop due to the internal resistance value becomes large.

本形態においては、この充電末期において、電圧値に基づいて抵抗値を算出することで、抵抗値増加を検知する。 In this embodiment, the increase in resistance value is detected by calculating the resistance value based on the voltage value at the end of charging.

図８は、図５に示した判定部１２１における抵抗値の算出方法を説明するための図である。図８に示すように、本形態においては、判定部１２１は、定電流充電終了時（第１の時刻：ｔ０）から定電圧充電終了時（第２の時刻：ｔ１）までの充電末期の期間において抵抗値を算出する。本形態においては、判定部１２１は、充電末期を最大セル電圧値が時系列で最大（図８においてＶｃｃ）となった点として検出する。ここで、最大となった点の電圧値を用いるものでなく、電圧値が最大となった測定点の前後の所定の数点（充電レートに応じた数）の期間に含まれる電圧値をＶｃｃとして用いるものであっても良い。その時刻での電流値をＩｃｃとする。また、判定部１２１は、電流値が所定の電流値Ｉｃｖ（Ｉｃｃよりもはるかに小さな値であって、０ではない値）になった時刻の最大セル電圧値をＶｃｖとする。 FIG. 8 is a diagram for explaining a method of calculating the resistance value in the determination unit 121 shown in FIG. As shown in FIG. 8, in the present embodiment, the determination unit 121 is in the period of the end of charging from the end of constant current charging (first time: t0) to the end of constant voltage charging (second time: t1). The resistance value is calculated in. In the present embodiment, the determination unit 121 detects the end of charging as a point at which the maximum cell voltage value reaches the maximum in time series (Vcc in FIG. 8). Here, instead of using the voltage value of the maximum point, Vcc is the voltage value included in the period of several predetermined points (number according to the charging rate) before and after the measurement point where the voltage value is maximum. It may be used as. Let Icc be the current value at that time. Further, the determination unit 121 sets Vcv as the maximum cell voltage value at the time when the current value reaches a predetermined current value Icv (a value much smaller than Icc and not 0).

判定部１２１は、最大蓄電池の電圧値を用いて抵抗値を算出する。本形態においては、判定部１２１は、以下の式を用いて抵抗値を算出する。
抵抗値＝（Ｖｃｃ−Ｖｃｖ）／（Ｉｃｃ−Ｉｃｖ）…（式１）
判定部１２１は、算出した抵抗値が、セルが劣化したときの抵抗値よりも大きな値である場合、抵抗値が増加したと判定する。このセルが劣化したときの抵抗値は、過去の運用履歴や実験等で得られた値であって、あらかじめ設定されている閾値である。 The determination unit 121 calculates the resistance value using the voltage value of the maximum storage battery. In this embodiment, the determination unit 121 calculates the resistance value using the following formula.
Resistance value = (Vcc-Vcv) / (Icc-Icv) ... (Equation 1)
When the calculated resistance value is larger than the resistance value when the cell deteriorates, the determination unit 121 determines that the resistance value has increased. The resistance value when this cell deteriorates is a value obtained in a past operation history, an experiment, or the like, and is a preset threshold value.

以下に、図４に示した蓄電システムにおける抵抗値増加の検出方法について説明する。図９は、図４に示した蓄電システムにおける抵抗値増加の検出方法の一例を説明するためのフローチャートである。 Hereinafter, a method for detecting an increase in resistance value in the power storage system shown in FIG. 4 will be described. FIG. 9 is a flowchart for explaining an example of a method for detecting an increase in resistance value in the power storage system shown in FIG.

まず、蓄電池２０１−１〜２０１−３に対して定電流定電圧充電を開始する（ステップＳ１１）。すると、監視部１１１は、蓄電池２０１−１〜２０１−３の電圧値それぞれを、また蓄電池２０１−１〜２０１−３に流れる電流値を所定の時間間隔で測定する（ステップＳ１２）。
判定部１２１は、蓄電池２０１−１〜２０１−３のうち、監視部１１１が測定した電圧値が最大である蓄電池の最大セル電圧値が所定の期間に測定された値であるかどうかを判定する（ステップＳ１３）。最大セル電圧値が所定の期間に測定された値である場合、判定部１２１は、その電圧値（Ｖｃｃ）とそのときに監視部１１１が測定した電流値（Ｉｃｃ）とを記憶部１３１に書き込む（ステップＳ１４）。判定部１２１は、引き続き、監視部１１１は、蓄電池２０１−１〜２０１−３の電圧値それぞれを、また蓄電池２０１−１〜２０１−３に流れる電流値を所定の時間間隔で測定する（ステップＳ１５）。
判定部１２１は、監視部１１１が測定した電流値があらかじめ設定された電流値（Ｉｃｖ：比較電圧値）以下であるかどうかを判定する（ステップＳ１６）。判定部１２１は、監視部１１１が測定した電流値がＩｃｖ以下である場合、監視部１１１がその電流値を測定したときに測定した電圧値（Ｖｃｖ：比較電圧値）とＶｃｃとＩｃｖとＩｃｖとを用いて、最大蓄電池の抵抗値を算出する（ステップＳ１７）。具体的には、判定部１２１は（式１）を用いて抵抗値を算出する。すると、判定部１２１は、算出した抵抗値と、あらかじめ設定されている抵抗閾値とに基づいて、抵抗値が増加しているかどうかを判定する（ステップＳ１８）。具体的には、判定部１２１は、算出した抵抗値が、セルが劣化したときの抵抗値（抵抗閾値）よりも大きな値である場合、抵抗値が増加したと判定する。 First, constant current and constant voltage charging is started for the storage batteries 201-1 to 201-3 (step S11). Then, the monitoring unit 111 measures each of the voltage values of the storage batteries 201-1 to 201-3 and the current value flowing through the storage batteries 201-1 to 201-3 at predetermined time intervals (step S12).
The determination unit 121 determines whether or not the maximum cell voltage value of the storage battery having the maximum voltage value measured by the monitoring unit 111 among the storage batteries 201-1 to 201-3 is the value measured in a predetermined period. (Step S13). When the maximum cell voltage value is a value measured in a predetermined period, the determination unit 121 writes the voltage value (Vcc) and the current value (Icc) measured by the monitoring unit 111 at that time to the storage unit 131. (Step S14). The determination unit 121 subsequently measures the voltage values of the storage batteries 201-1 to 201-3 and the current values flowing through the storage batteries 201-1 to 201-3 at predetermined time intervals (step S15). ).
The determination unit 121 determines whether or not the current value measured by the monitoring unit 111 is equal to or less than a preset current value (Icv: comparison voltage value) (step S16). When the current value measured by the monitoring unit 111 is Icv or less, the determination unit 121 determines the voltage value (Vcv: comparative voltage value), Vcc, Icv, and Icv measured when the monitoring unit 111 measures the current value. Is used to calculate the resistance value of the maximum storage battery (step S17). Specifically, the determination unit 121 calculates the resistance value using (Equation 1). Then, the determination unit 121 determines whether or not the resistance value is increasing based on the calculated resistance value and the preset resistance threshold value (step S18). Specifically, the determination unit 121 determines that the resistance value has increased when the calculated resistance value is larger than the resistance value (resistance threshold value) when the cell deteriorates.

なお、図５に示した記憶部１３１が、電圧値および電流値を記憶する場合、蓄電池を識別できる識別情報と対応付けて記憶するものであっても良い。これにより、抵抗値が増加している電圧値の蓄電池を特定することが可能となる。 When the storage unit 131 shown in FIG. 5 stores the voltage value and the current value, it may be stored in association with the identification information that can identify the storage battery. This makes it possible to identify a storage battery having a voltage value whose resistance value is increasing.

また、上述したＶｃｖを満充電電圧値とし、Ｉｃｖを０とするものであっても良い。この場合、最大セル電圧値の最大となる１点のみで抵抗値を算出することができる。 Further, the above-mentioned Vcv may be set to the full charge voltage value, and Icv may be set to 0. In this case, the resistance value can be calculated only at one point that is the maximum of the maximum cell voltage value.

また、図５に示した記憶部１３１が電圧値および電流値を記憶する時刻の範囲は閾値に対応した範囲を含んでいれば、その範囲の広さは限定しない。また、その範囲は、複数の範囲に分かれていてもよい。 Further, as long as the time range in which the storage unit 131 shown in FIG. 5 stores the voltage value and the current value includes the range corresponding to the threshold value, the range is not limited. Further, the range may be divided into a plurality of ranges.

このように、蓄電池の電圧値が所定の期間に測定された値または最大値となった時の電圧値および電流値と、所定の比較電圧値および比較電流値とに基づいて抵抗値を算出し、その抵抗値と所定の抵抗閾値とを比較して、抵抗値が増加しているかどうかを判定する。そのため、充電中の短い期間に測定した測定値を用いて抵抗値の増加を検出することができる。 In this way, the resistance value is calculated based on the voltage value and current value when the voltage value of the storage battery reaches the measured value or the maximum value in a predetermined period, and the predetermined comparison voltage value and comparison current value. , The resistance value is compared with a predetermined resistance threshold to determine whether or not the resistance value is increasing. Therefore, the increase in resistance value can be detected by using the measured value measured in a short period during charging.

なお、上述した形態を単独で用いるものであっても良いし、組み合わせて用いるものであっても良い。また、抵抗値増加を原因として電圧降下が生じることを利用するものであれば、他の方法を用いるものであっても良い。また、蓄電池の種類や材質については、特に規定しない。 The above-mentioned forms may be used alone or in combination. Further, another method may be used as long as it utilizes the fact that the voltage drop occurs due to the increase in the resistance value. In addition, the type and material of the storage battery are not specified.

上述した検出装置１００，１０１それぞれに設けられた各構成要素は、ハードウェア単位の要素ではなく、機能単位の要素を示している。また、検出装置１００，１０１それぞれが行う処理は、目的に応じてそれぞれ作製された論理回路で行うようにしても良い。また、処理内容を手順として記述したコンピュータプログラム（以下、プログラムと称する）を検出装置１００，１０１それぞれにて読取可能な記録媒体に記録し、この記録媒体に記録されたプログラムを検出装置１００，１０１それぞれに読み込ませ、実行するものであっても良い。検出装置１００，１０１それぞれにて読取可能な記録媒体とは、フロッピー（登録商標）ディスク、光磁気ディスク、ＤＶＤ（Ｄｉｇｉｔａｌ Ｖｅｒｓａｔｉｌｅ Ｄｉｓｃ）、ＣＤ（Ｃｏｍｐａｃｔ Ｄｉｓｃ）、Ｂｌｕ−ｒａｙ（登録商標） Ｄｉｓｃなどの移設可能な記録媒体の他、検出装置１００，１０１それぞれに内蔵されたＲＯＭ（Ｒｅａｄ Ｏｎｌｙ Ｍｅｍｏｒｙ）、ＲＡＭ（Ｒａｎｄｏｍ Ａｃｃｅｓｓ Ｍｅｍｏｒｙ）等のメモリやＨＤＤ（Ｈａｒｄ Ｄｉｓｃ Ｄｒｉｖｅ）等を指す。この記録媒体に記録されたプログラムは、検出装置１００，１０１それぞれに設けられたＣＰＵ（Ｃｅｎｔｒａｌ Ｐｒｏｃｅｓｓｉｎｇ Ｕｎｉｔ）にて読み込まれ、ＣＰＵの制御によって、上述したものと同様の処理が行われる。ここで、ＣＰＵは、プログラムが記録された記録媒体から読み込まれたプログラムを実行するコンピュータとして動作するものである。 Each component provided in each of the detection devices 100 and 101 described above indicates an element of a functional unit, not an element of a hardware unit. Further, the processing performed by each of the detection devices 100 and 101 may be performed by logic circuits manufactured according to the purpose. Further, a computer program (hereinafter referred to as a program) in which the processing contents are described as a procedure is recorded on a recording medium that can be read by the detection devices 100 and 101, and the program recorded on the recording medium is recorded on the detection devices 100 and 101. It may be read by each and executed. Recording media that can be read by each of the detection devices 100 and 101 include floppy (registered trademark) discs, optical magnetic discs, DVDs (Digital Versailles Disc), CDs (Compact Disc), Blu-ray (registered trademark) Disc, and the like. In addition to the transferable recording medium, it refers to a memory such as a ROM (Read Only Memory) and a RAM (Random Access Memory) built in each of the detection devices 100 and 101, an HDD (Hard Disk Drive), and the like. The program recorded on the recording medium is read by a CPU (Central Processing Unit) provided in each of the detection devices 100 and 101, and the same processing as described above is performed under the control of the CPU. Here, the CPU operates as a computer that executes a program read from a recording medium in which the program is recorded.

以上、実施形態を参照して本願発明を説明したが、本願発明は、上記実施形態に限定されたものではない。本願発明の構成や詳細には、本願発明のスコープ内で当業者が理解し得る様々な変更を行うことができる。 Although the invention of the present application has been described above with reference to the embodiment, the invention of the present application is not limited to the above embodiment. Various changes that can be understood by those skilled in the art can be made within the scope of the present invention in terms of the structure and details of the present invention.

上記の実施の形態の一部または全部は、以下の付記のようにも記載され得るが、以下には限られない。
（付記１）複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する監視部と、
前記複数の蓄電池のうち、前記監視部が測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに前記監視部が測定した電流値と所定の比較電圧値および比較電流値とに基づいて抵抗値を算出し、該算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する判定部とを有する検出装置。
（付記２）前記比較電圧値は、前記蓄電池の満充電電圧値であり、前記比較電流値は０である、付記１に記載の検出装置。
（付記３）前記比較電圧値は、前記所定の蓄電池の電流値が前記比較電流値以下となったときに測定された該所定の蓄電池の電圧値である、付記１に記載の検出装置。
（付記４）前記判定部は、前記所定の蓄電池の電圧値が所定の期間に測定された値であると判定された電圧値から前記比較電圧値を差し引いた値を、該電圧値を測定したときに前記監視部が測定した電流値から前記比較電流値を差し引いた値で除算した値を前記抵抗値として算出する、付記１から３のいずれか１項に記載の検出装置。
（付記５）前記判定部は、前記算出した抵抗値が前記抵抗閾値よりも大きな値である場合、前記抵抗値が増加していると判定する、付記１から４のいずれか１項に記載の検出装置。
（付記６）前記所定の蓄電池は、前記複数の蓄電池のうち、前記監視部が測定した電圧値が最大である蓄電池である、付記１から５のいずれか１項に記載の検出装置。
（付記７）前記所定の期間は、前記所定の蓄電池の電圧値が最大値となる点を含む期間である、付記１から６のいずれか１項に記載の検出装置。
（付記８）複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する処理と、
前記複数の蓄電池のうち、前記測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに測定した電流値と所定の比較電圧値および比較電流値とに基づいて抵抗値を算出する処理と、
前記算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する処理とを行う検出方法。
（付記９）複数の蓄電池と、
前記複数の蓄電池の抵抗値を検出する検出装置とを有し、
前記検出装置は、
前記複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する監視部と、
前記複数の蓄電池のうち、前記監視部が測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに前記監視部が測定した電流値と所定の比較電圧値および比較電流値とに基づいて前記抵抗値を算出し、該算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する判定部とを有する蓄電システム。
（付記１０）コンピュータに、
複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する手順と、
前記複数の蓄電池のうち、前記測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに測定した電流値と所定の比較電圧値および比較電流値とに基づいて抵抗値を算出する手順と、
前記算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する手順とを実行させるためのプログラム。 Some or all of the above embodiments may also be described, but not limited to:
(Appendix 1) When a plurality of storage batteries are charged with a constant current and a constant voltage, a monitoring unit that measures the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and a monitoring unit.
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the voltage value of the predetermined storage battery measured by the monitoring unit becomes maximum, and the voltage value of the predetermined storage battery measured by the monitoring unit at that time. A resistance value is calculated based on the current value, a predetermined comparative voltage value, and a comparative current value, and it is determined whether or not the resistance value is increased based on the calculated resistance value and the predetermined resistance threshold value. A detection device having a determination unit.
(Supplementary note 2) The detection device according to Supplementary note 1, wherein the comparative voltage value is a full charge voltage value of the storage battery, and the comparative current value is 0.
(Appendix 3) The detection device according to Appendix 1, wherein the comparative voltage value is a voltage value of the predetermined storage battery measured when the current value of the predetermined storage battery becomes equal to or less than the comparative current value.
(Appendix 4) The determination unit measures the voltage value by subtracting the comparison voltage value from the voltage value determined that the voltage value of the predetermined storage battery is the value measured in a predetermined period. The detection device according to any one of Supplementary note 1 to 3, wherein a value obtained by dividing the current value measured by the monitoring unit by a value obtained by subtracting the comparative current value is calculated as the resistance value.
(Supplementary note 5) The item according to any one of Supplementary note 1 to 4, wherein the determination unit determines that the resistance value is increasing when the calculated resistance value is larger than the resistance threshold value. Detection device.
(Supplementary note 6) The detection device according to any one of Supplementary note 1 to 5, wherein the predetermined storage battery is a storage battery having the maximum voltage value measured by the monitoring unit among the plurality of storage batteries.
(Supplementary note 7) The detection device according to any one of Supplementary note 1 to 6, wherein the predetermined period includes a point at which the voltage value of the predetermined storage battery becomes the maximum value.
(Appendix 8) When a plurality of storage batteries are charged with a constant current and a constant voltage, a process of measuring the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the measured voltage value of the predetermined storage battery becomes maximum, the current value measured at that time, and the predetermined comparison voltage. The process of calculating the resistance value based on the value and the comparison current value, and
A detection method that performs a process of determining whether or not the resistance value is increasing based on the calculated resistance value and a predetermined resistance threshold value.
(Appendix 9) With multiple storage batteries
It has a detection device that detects the resistance value of the plurality of storage batteries.
The detection device is
When the plurality of storage batteries are charged with constant current and constant voltage, a monitoring unit that measures the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and a monitoring unit.
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the voltage value of the predetermined storage battery measured by the monitoring unit becomes maximum, and the voltage value of the predetermined storage battery measured by the monitoring unit at that time. The resistance value is calculated based on the current value, the predetermined comparative voltage value, and the comparative current value, and it is determined whether or not the resistance value is increased based on the calculated resistance value and the predetermined resistance threshold value. A power storage system having a determination unit and a determination unit.
(Appendix 10) To the computer
When charging a plurality of storage batteries with constant current and constant voltage, a procedure for measuring the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the measured voltage value of the predetermined storage battery becomes maximum, the current value measured at that time, and the predetermined comparison voltage. The procedure for calculating the resistance value based on the value and the comparison current value, and
A program for executing a procedure for determining whether or not the resistance value is increasing based on the calculated resistance value and a predetermined resistance threshold value.

１００，１０１ 検出装置
１１０，１１１ 監視部
１２０，１２１ 判定部
１３１ 記憶部
２００−１〜２００−３，２０１−１〜２０１−３ 蓄電池 100, 101 Detection device 110, 111 Monitoring unit 120, 121 Judgment unit 131 Storage unit 200-1 to 200-3, 201-1 to 201-3 Storage battery

Claims (8)

直列に接続された複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する監視部と、
前記複数の蓄電池のうち、前記監視部が測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに前記監視部が測定した電流値と所定の比較電圧値および比較電流値とに基づいて抵抗値を算出し、該算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する判定部とを有し、
前記判定部は、前記所定の蓄電池の電圧値が所定の期間に測定された値であると判定された電圧値から前記比較電圧値を差し引いた値を、該電圧値を測定したときに前記監視部が測定した電流値から前記比較電流値を差し引いた値で除算した値を前記抵抗値として算出する検出装置。 When a plurality of storage batteries connected in series are charged with a constant current and a constant voltage, a monitoring unit that measures the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and a monitoring unit.
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the voltage value of the predetermined storage battery measured by the monitoring unit becomes maximum, and the voltage value of the predetermined storage battery measured by the monitoring unit at that time. A resistance value is calculated based on the current value, a predetermined comparative voltage value, and a comparative current value, and it is determined whether or not the resistance value is increased based on the calculated resistance value and the predetermined resistance threshold value. have a a determination unit,
The determination unit monitors the voltage value of the predetermined storage battery when the voltage value is measured by subtracting the comparison voltage value from the voltage value determined to be the value measured in a predetermined period. A detection device that calculates a value obtained by dividing the current value measured by the unit by a value obtained by subtracting the comparative current value as the resistance value. 請求項１に記載の検出装置において、
前記比較電圧値は、前記所定の蓄電池の電流値が前記比較電流値以下となったときに測定された該所定の蓄電池の電圧値である検出装置。 In the detection device according to claim 1,
The comparative voltage value is a detection device which is a voltage value of the predetermined storage battery measured when the current value of the predetermined storage battery becomes equal to or less than the comparative current value. 請求項１または請求項２に記載の検出装置において、
前記判定部は、前記算出した抵抗値が前記抵抗閾値よりも大きな値である場合、前記抵抗値が増加していると判定する検出装置。 In the detection device according to claim 1 or 2.
The determination unit is a detection device that determines that the resistance value is increasing when the calculated resistance value is larger than the resistance threshold value. 請求項１から３のいずれか１項に記載の検出装置において、
前記所定の蓄電池は、前記複数の蓄電池のうち、前記監視部が測定した電圧値が最大である蓄電池である検出装置。 In the detection device according to any one of claims 1 to 3.
The predetermined storage battery is a detection device which is a storage battery having the maximum voltage value measured by the monitoring unit among the plurality of storage batteries. 請求項１から４のいずれか１項に記載の検出装置において、
前記所定の期間は、前記所定の蓄電池の電圧値が最大値となる点を含む期間である検出装置。 In the detection device according to any one of claims 1 to 4.
The predetermined period is a detection device including a point at which the voltage value of the predetermined storage battery becomes the maximum value. 直列に接続された複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する処理と、
前記複数の蓄電池のうち、前記測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに測定した電流値と所定の比較電圧値および比較電流値とに基づいて抵抗値を算出する処理と、
前記算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する判定処理とを行い、
前記判定処理は、前記所定の蓄電池の電圧値が所定の期間に測定された値であると判定された電圧値から前記比較電圧値を差し引いた値を、該電圧値を測定したときに前記測定した電流値から前記比較電流値を差し引いた値で除算した値を前記抵抗値として算出する検出方法。 When constant current and constant voltage charging is performed on a plurality of storage batteries connected in series, a process of measuring the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the measured voltage value of the predetermined storage battery becomes maximum, the current value measured at that time, and the predetermined comparison voltage. The process of calculating the resistance value based on the value and the comparison current value, and
Wherein based on the calculated resistance value and a predetermined resistance threshold, it has rows and determination processing for determining whether or not the resistance value increases,
In the determination process, the measurement is performed when the voltage value is measured by subtracting the comparison voltage value from the voltage value determined that the voltage value of the predetermined storage battery is the value measured in a predetermined period. A detection method for calculating a value obtained by dividing a value obtained by subtracting the comparative current value from the calculated current value as the resistance value. 直列に接続された複数の蓄電池と、
前記複数の蓄電池の抵抗値を検出する検出装置とを有し、
前記検出装置は、
前記複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する監視部と、
前記複数の蓄電池のうち、前記監視部が測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに前記監視部が測定した電流値と所定の比較電圧値および比較電流値とに基づいて前記抵抗値を算出し、該算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する判定部とを有し、
前記判定部は、前記所定の蓄電池の電圧値が所定の期間に測定された値であると判定された電圧値から前記比較電圧値を差し引いた値を、該電圧値を測定したときに前記監視部が測定した電流値から前記比較電流値を差し引いた値で除算した値を前記抵抗値として算出する蓄電システム。 With multiple storage batteries connected in series,
It has a detection device that detects the resistance value of the plurality of storage batteries.
The detection device is
When the plurality of storage batteries are charged with constant current and constant voltage, a monitoring unit that measures the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and a monitoring unit.
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the voltage value of the predetermined storage battery measured by the monitoring unit becomes maximum, and the voltage value of the predetermined storage battery measured by the monitoring unit at that time. The resistance value is calculated based on the current value, the predetermined comparative voltage value, and the comparative current value, and it is determined whether or not the resistance value is increased based on the calculated resistance value and the predetermined resistance threshold value. and a determination unit that possess,
The determination unit monitors the voltage value of the predetermined storage battery when the voltage value is measured by subtracting the comparison voltage value from the voltage value determined to be the value measured in a predetermined period. A power storage system that calculates the resistance value by dividing the current value measured by the unit by the value obtained by subtracting the comparative current value. コンピュータに、
直列に接続された複数の蓄電池に定電流定電圧充電を行う際、前記複数の蓄電池の電圧値および該複数の蓄電池へ流れる電流値それぞれを所定の時間間隔で測定する手順と、
前記複数の蓄電池のうち、前記測定した所定の蓄電池の電圧値が最大となる時刻を含む所定の期間において測定された該所定の蓄電池の電圧値とそのときに測定した電流値と所定の比較電圧値および比較電流値とに基づいて抵抗値を算出する手順と、
前記算出した抵抗値と所定の抵抗閾値とに基づいて、前記抵抗値が増加しているか否かを判定する判定手順とを実行させるためのものであり、
前記判定手順は、前記所定の蓄電池の電圧値が所定の期間に測定された値であると判定された電圧値から前記比較電圧値を差し引いた値を、該電圧値を測定したときに前記測定した電流値から前記比較電流値を差し引いた値で除算した値を前記抵抗値として算出するプログラム。 On the computer
When performing constant current constant voltage charging of a plurality of storage batteries connected in series, a procedure for measuring the voltage value of the plurality of storage batteries and the current value flowing through the plurality of storage batteries at predetermined time intervals, and
Among the plurality of storage batteries, the voltage value of the predetermined storage battery measured in a predetermined period including the time when the measured voltage value of the predetermined storage battery becomes maximum, the current value measured at that time, and the predetermined comparison voltage. The procedure for calculating the resistance value based on the value and the comparison current value, and
The purpose is to execute a determination procedure for determining whether or not the resistance value is increasing based on the calculated resistance value and a predetermined resistance threshold value .
In the determination procedure, the measurement is performed when the voltage value is measured by subtracting the comparison voltage value from the voltage value determined that the voltage value of the predetermined storage battery is the value measured in a predetermined period. A program that calculates the resistance value by dividing the calculated current value by the value obtained by subtracting the comparative current value.
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