JP7491832B2

Movatterモバイル変換

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Publication number: JP7491832B2
Application number: JP2020215288A
Authority: JP
Inventors: 博徳力丸; 弘行 ▲高▼宮; 泰徳湊
Original assignee: Nippon Steel Texeng Co Ltd
Current assignee: Nippon Steel Texeng Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2024-05-28
Anticipated expiration: 2040-12-24
Also published as: JP7603869B2; JP2024091871A; JP2022100974A

Description

Translated fromJapanese

本発明は、二次電池の充放電検査（試験）中に、充放電検査装置における電気接続端子の劣化及び接触不良等の異常を高精度で検出することができる充放電検査装置の電気接続端子の異常判定方法に関する。The present invention relates to a method for determining abnormalities in the electrical connection terminals of a charge/discharge inspection device that can detect abnormalities such as deterioration and poor contact of the electrical connection terminals of the charge/discharge inspection device with high accuracy during charge/discharge inspection (test) of a secondary battery.

従来、二次電池の充放電検査は、充放電検査装置の充放電電源の電気接続端子（プローブピン、クリップ又は丸端子等）を二次電池の電極に電気接続して行われる。従って、正確な充放電検査を行うためには、充放電電源から二次電池までの配線（経路）異常、及び電気接続端子と二次電池の電極との接続（接触）不良等の異常が発生していないかを確認し、異常が発生している場合には、部品の交換その他のメンテナンスを行う必要がある。そこで、例えば、特許文献１には、充電経路の抵抗値を算出し、算出された抵抗値と、充電経路の設計上の抵抗値とを比較して、充電経路の異常の有無を判定する充放電検査システムが提案されている。また、特許文献２には、充放電電流が流れる負荷線と、二次電池の正負端子（電極）との接触抵抗を算出し、算出した抵抗値の大小に基づいて、負荷線（電気接続端子）と、正負端子との接触不良を検出する充放電試験装置が提案されている。Conventionally, charge/discharge inspection of a secondary battery is performed by electrically connecting the electrical connection terminals (probe pins, clips, round terminals, etc.) of the charge/discharge power supply of the charge/discharge inspection device to the electrodes of the secondary battery. Therefore, in order to perform an accurate charge/discharge inspection, it is necessary to check for abnormalities such as wiring (path) abnormalities from the charge/discharge power supply to the secondary battery and poor connection (contact) between the electrical connection terminals and the electrodes of the secondary battery, and if an abnormality occurs, it is necessary to replace parts or perform other maintenance. For example,Patent Document 1 proposes a charge/discharge inspection system that calculates the resistance value of the charging path and compares the calculated resistance value with the design resistance value of the charging path to determine whether or not there is an abnormality in the charging path. In addition, Patent Document 2 proposes a charge/discharge test device that calculates the contact resistance between a load line through which a charge/discharge current flows and the positive and negative terminals (electrodes) of the secondary battery, and detects poor contact between the load line (electrical connection terminals) and the positive and negative terminals based on the magnitude of the calculated resistance value.

特許第６０８６７６８号公報Japanese Patent No. 6086768特開２０１５－１１７９９５号公報JP 2015-117995 A

このように、抵抗の絶対値を算出して異常判定を行う場合、判定の基準となる値が必要となる。つまり、特許文献１及び特許文献２では、それぞれ充電経路（充放電電源から二次電池まで）の設計上の（正常な）抵抗（経路抵抗、ライン抵抗）及び負荷線（電気接続端子）と二次電池の正負端子が正常に接触している場合の接触抵抗に加え、異常の有無を判定するための閾値（抵抗の変動量の許容限界値）が必要である。
しかし、充放電検査装置は、多数の二次電池の充放電検査を同時に（並行して）行うために、１又は複数の充放電電源のそれぞれに複数の二次電池が接続されており、それぞれの充放電電源の各出力端子から各二次電池の電極に至るまでの距離（配線（経路）の長さ）はチャンネルにより異なり、その配線抵抗（ライン抵抗）もチャンネル毎に異なる。
従って、抵抗の絶対値に基づいて厳密な異常判定を行うためには、チャンネル毎の正常時の配線抵抗値（ライン抵抗値）に対応させて異常判定値（閾値）を設定する必要があり、設定に手間がかかるという課題があった。
また、特許文献１には、算出された抵抗値と設計上の抵抗値とを比較して、充電経路に異常があるか否かを判定する以外に、今回算出された抵抗値と、過去に算出された抵抗値とを比較し、その差が所定の閾値より大きい場合に、充電経路に異常があると判定する方法、及び今回算出された抵抗値と、過去に算出された抵抗値の所定期間内の平均値とを比較し、その差が所定の閾値より大きい場合に、充電経路に異常があると判定する方法も提案されている。これらの方法では、設計上の抵抗値を求める必要はないが、今回算出された抵抗値と、過去に算出された抵抗値又は過去に算出された抵抗値の所定期間内の平均値を比較して異常の有無を判定するためには、前述の方法と同様に、閾値を設定する必要があった。
さらに、特許文献１は、充電経路の異常を検出することに特化したものであり、充電経路に配置されるリアクトルやヒューズ等の各素子の不良や、それら各素子を電気的に接続するボルトの緩み等の接触不良に着目したものであるが、このような配線経路の不具合（劣化）が発生する確率は極めて低い。一方、実際の充放電検査では、次々と搬送される二次電池の電極に対し、当接（突き当て）、嵌合、又は挟持等の方法で電気接続を繰り返す充放電電源の電気接続端子においては、損耗等の経時的な劣化やそれに伴う接触不良が発生し易く、電気接続端子を交換する頻度が高いにも関わらず、電気接続端子の劣化を検知することについては検討されていない。
また、特許文献２は、負荷線（電気接続端子）と二次電池の電極との接触不良を検出することに特化したものであり、充放電電流が流れる負荷線と、二次電池の電極との接触抵抗を直接算出することにより、負荷線と電極との接触不良を検出しているため、電気接続端子自体の異常や損耗等による経時的な劣化を検出することはできない。
以上のことから、これまでは、充放電電源のそれぞれの電気接続端子そのものの劣化状態を個別に検出することができなかったため、実際の劣化の有無を確認することなく、全ての電気接続端子を定期的に交換しており、メンテナンスの費用と手間が増大し、不経済で、省資源性に欠けるという問題があった。In this way, when the absolute value of resistance is calculated to judge an abnormality, a reference value for the judgment is required. That is, in each ofPatent Document 1 and Patent Document 2, in addition to the (normal) resistance (path resistance, line resistance) in the design of the charging path (from the charging/discharging power source to the secondary battery) and the contact resistance when the load line (electrical connection terminal) and the positive and negative terminals of the secondary battery are in normal contact, a threshold value (allowable limit value of the amount of variation in resistance) is required to judge the presence or absence of an abnormality.
However, in order for the charge/discharge inspection device to perform charge/discharge inspections of a large number of secondary batteries simultaneously (in parallel), multiple secondary batteries are connected to each of one or more charge/discharge power sources, and the distance (length of the wiring (path)) from each output terminal of each charge/discharge power source to the electrode of each secondary battery varies depending on the channel, and the wiring resistance (line resistance) also varies from channel to channel.
Therefore, in order to perform strict abnormality judgment based on the absolute value of resistance, it is necessary to set an abnormality judgment value (threshold value) corresponding to the normal wiring resistance value (line resistance value) for each channel, which poses the problem of time-consuming setting.
In addition to comparing the calculated resistance value with the design resistance value to determine whether or not there is an abnormality in the charging path,Patent Document 1 also proposes a method of comparing a currently calculated resistance value with a previously calculated resistance value and determining whether or not there is an abnormality in the charging path if the difference between the currently calculated resistance value and the previously calculated resistance value is greater than a predetermined threshold, and a method of comparing a currently calculated resistance value with an average value of previously calculated resistance values within a predetermined period and determining whether or not there is an abnormality in the charging path if the difference between the currently calculated resistance value and the previously calculated resistance value within a predetermined period is greater than a predetermined threshold. These methods do not require the design resistance value to be calculated, but in order to determine whether or not there is an abnormality by comparing the currently calculated resistance value with a previously calculated resistance value or an average value of previously calculated resistance values within a predetermined period, it is necessary to set a threshold value as in the above-mentioned method.
Furthermore,Patent Document 1 is specialized in detecting abnormalities in the charging path, focusing on defects in elements such as reactors and fuses arranged in the charging path, and poor contact such as loose bolts that electrically connect these elements, but the probability of such wiring path defects (deterioration) occurring is extremely low. Meanwhile, in actual charge/discharge inspections, electrical connection terminals of a charging/discharging power source that are repeatedly electrically connected to electrodes of secondary batteries that are transported one after another by abutting (butting), fitting, clamping, or other methods are prone to deterioration over time such as wear and tear and the associated poor contact, and although electrical connection terminals are frequently replaced, detection of deterioration of electrical connection terminals has not been considered.
Furthermore, Patent Document 2 is specialized in detecting poor contact between a load line (electrical connection terminal) and an electrode of a secondary battery, and detects poor contact between the load line and an electrode by directly calculating the contact resistance between the load line through which charging/discharging current flows and the electrode of the secondary battery. Therefore, it is not possible to detect deterioration over time due to abnormalities or wear and tear of the electrical connection terminal itself.
For the reasons described above, until now it has not been possible to individually detect the deterioration state of each electrical connection terminal of a charge/discharge power source, and therefore all electrical connection terminals have been replaced periodically without checking whether or not there was actual deterioration. This has resulted in problems such as increased maintenance costs and labor, being uneconomical, and lacking in resource conservation.

本発明はかかる事情に鑑みてなされたもので、充放電検査装置における充放電電源のそれぞれの電気接続端子の経年劣化及び接触不良等の異常を高精度で検出することができ、異常が発生している電気接続端子のみを確実かつ効率的に交換することを可能として、メンテナンスにかかる費用と手間を大幅に削減することができる充放電検査装置の電気接続端子の異常判定方法を提供することを目的とする。The present invention has been made in consideration of these circumstances, and aims to provide a method for determining abnormalities in the electrical connection terminals of a charge/discharge inspection device that can detect abnormalities such as deterioration over time and poor contact in each electrical connection terminal of a charge/discharge power source in a charge/discharge inspection device with high accuracy, and enables only the electrical connection terminals in which an abnormality has occurred to be replaced reliably and efficiently, thereby significantly reducing the costs and effort required for maintenance.

前記目的に沿う本発明に係る充放電検査装置の電気接続端子の異常判定方法は、複数の二次電池を同時に充放電検査するための充放電検査装置の１又は複数の充放電電源におけるそれぞれの複数組の正負の電気接続端子の異常を個別に検出する充放電検査装置の電気接続端子の異常判定方法であって、
複数の前記二次電池の充放電検査中に取得される前記各充放電電源の出力電圧及び前記各二次電池の正負の電極間の電池電圧の測定データを時系列で蓄積し、該各測定データに基づいて前記各充放電電源の各組の正負の前記電気接続端子の劣化傾向及び前記各充放電電源の各組の正負の前記電気接続端子と前記各二次電池の正負の前記電極との接触不良の有無を診断する。In accordance with the above-mentioned object, the method for determining an abnormality in an electrical connection terminal of a charge/discharge inspection device according to the present invention is a method for determining an abnormality in an electrical connection terminal of a charge/discharge inspection device, which individually detects abnormalities in each of a plurality of pairs of positive and negative electrical connection terminals in one or a plurality of charge/discharge power sources of a charge/discharge inspection device for simultaneously charging and discharging a plurality of secondary batteries, comprising:
Measurement data on the output voltage of each of the charging/discharging power sources and the battery voltage between the positive and negative electrodes of each of the secondary batteries obtained during charging/discharging inspection of the multiple secondary batteries is accumulated in chronological order, and based on the measurement data, a diagnosis is made as to the deterioration tendency of the positive and negative electrical connection terminals of each pair of the charging/discharging power sources and the presence or absence of poor contact between the positive and negative electrical connection terminals of each pair of the charging/discharging power sources and the positive and negative electrodes of each of the secondary batteries.

本発明に係る充放電検査装置の電気接続端子の異常判定方法において、前記各充放電電源の各組の正負の前記電気接続端子の劣化傾向の有無は、前記各充放電電源の出力電圧と、前記各充放電電源の各組の正負の前記電気接続端子と電気接続された前記各二次電池の電池電圧との電圧差の経時変化から診断することができる。In the method for determining an abnormality in the electrical connection terminals of the charge/discharge inspection device according to the present invention, the presence or absence of a tendency for the positive and negative electrical connection terminals of each pair of the charge/discharge power sources to deteriorate can be diagnosed from the change over time in the voltage difference between the output voltage of each of the charge/discharge power sources and the battery voltage of each of the secondary batteries electrically connected to the positive and negative electrical connection terminals of each pair of the charge/discharge power sources.

本発明に係る充放電検査装置の電気接続端子の異常判定方法において、前記各充放電電源の各組の正負の前記電気接続端子のうち、前記電圧差が経時的に上昇傾向にある正負の前記電気接続端子が劣化傾向にあると診断することが好ましい。In the method for determining an abnormality in the electrical connection terminals of the charge/discharge inspection device according to the present invention, it is preferable to diagnose, among the positive and negative electrical connection terminals of each pair of the charge/discharge power sources, the positive and negative electrical connection terminals in which the voltage difference shows an increasing tendency over time as being prone to deterioration.

本発明に係る充放電検査装置の電気接続端子の異常判定方法において、前記電圧差の経時変化は、前記各充放電電源の各組の正負の前記電気接続端子が新品に交換された直後に取得される、前記各充放電電源の出力電圧と、前記各充放電電源の各組の正負の前記電気接続端子と電気接続された前記各二次電池の電池電圧との電圧差を初期値として求められることがさらに好ましい。In the method for determining an abnormality in the electrical connection terminals of the charge/discharge inspection device according to the present invention, it is further preferable that the change in the voltage difference over time is determined using as an initial value the voltage difference between the output voltage of each of the charge/discharge power sources and the battery voltage of each of the secondary batteries electrically connected to the positive and negative electrical connection terminals of each of the charge/discharge power sources, which is obtained immediately after the positive and negative electrical connection terminals of each of the charge/discharge power sources are replaced with new ones.

本発明に係る充放電検査装置の電気接続端子の異常判定方法において、前記各測定データの蓄積は、前記各充放電電源が同一の設定電流を出力している下で行われることが好ましい。In the method for determining an abnormality in an electrical connection terminal of a charge/discharge inspection device according to the present invention, it is preferable that the accumulation of each of the measurement data is performed while each of the charge/discharge power sources is outputting the same set current.

本発明に係る充放電検査装置の電気接続端子の異常判定方法において、前記二次電池の充放電検査中に、前記各充放電電源の出力電流の測定データを時系列で蓄積することができる。In the method for determining an abnormality in an electrical connection terminal of a charge/discharge inspection device according to the present invention, measurement data on the output current of each of the charge/discharge power sources can be accumulated in chronological order during the charge/discharge inspection of the secondary battery.

本発明に係る充放電検査装置の電気接続端子の異常判定方法において、前記二次電池の充放電検査中に、前記各二次電池の電池温度の測定データを蓄積し、該各電池温度に基づいて前記各充放電電源の各組の正負の前記電気接続端子と前記各二次電池の正負の前記電極との接触不良の有無を診断してもよい。In the method for determining an abnormality in the electrical connection terminals of the charge/discharge inspection device according to the present invention, measurement data on the battery temperature of each secondary battery may be accumulated during the charge/discharge inspection of the secondary battery, and the presence or absence of poor contact between the positive and negative electrical connection terminals of each set of each charge/discharge power source and the positive and negative electrodes of each secondary battery may be diagnosed based on the battery temperatures.

本発明に係る充放電検査装置の電気接続端子の異常判定方法は、複数の二次電池の充放電検査中に取得される各充放電電源の出力電圧及び各二次電池の正負の電極間の電池電圧の測定データを時系列で蓄積することにより、蓄積された各測定データに基づいて各充放電電源の各組の正負の電気接続端子の劣化傾向及び各充放電電源の各組の正負の電気接続端子と各二次電池の正負の電極との接触不良の有無を診断することができるので、診断のための専用の治具等を必要とせず、チャンネル毎の配線抵抗の影響を受けることなく、劣化傾向又は接触不良が発生している電気接続端子のみの交換又はメンテナンスを効率的に行うことができる。The method for determining abnormalities in electrical connection terminals of a charge/discharge inspection device according to the present invention accumulates measurement data on the output voltage of each charge/discharge power source and the battery voltage between the positive and negative electrodes of each secondary battery in a chronological order, which are obtained during charge/discharge inspection of multiple secondary batteries. Based on the accumulated measurement data, the deterioration tendency of the positive and negative electrical connection terminals of each pair of each charge/discharge power source and the presence or absence of poor contact between the positive and negative electrical connection terminals of each pair of each charge/discharge power source and the positive and negative electrodes of each secondary battery can be diagnosed. This means that no dedicated tools or other tools are required for diagnosis, and it is possible to efficiently replace or maintain only electrical connection terminals that are tending to deteriorate or have poor contact, without being affected by the wiring resistance of each channel.

本発明の一実施の形態に係る充放電検査装置の電気接続端子の異常判定方法の説明図である。5 is an explanatory diagram of a method for determining an abnormality in an electrical connection terminal of a charge/discharge inspection device according to an embodiment of the present invention. FIG.

続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。
図１に示す本発明の一実施の形態に係る充放電検査装置の電気接続端子の異常判定方法は、複数の二次電池１０を同時に充放電検査（試験）するための充放電検査装置１１の充放電電源１２における複数組の正負の電気接続端子１３ａ、１３ｂの劣化及び接触不良等の異常の有無を個別に高精度で検出するものである。ここで、１つの充放電電源１２に接続できる二次電池１０の数は適宜、選択することができる。なお、図１では、充放電検査装置１１が１つの充放電電源１２を備えた場合を示しているが、充放電検査装置は複数の充放電電源を備えることができ、その数は適宜、選択することができる。Next, with reference to the attached drawings, an embodiment of the present invention will be described for better understanding of the present invention.
The method for determining an abnormality in an electrical connection terminal of a charge/discharge inspection device according to an embodiment of the present invention shown in Fig. 1 detects with high accuracy the presence or absence of an abnormality, such as deterioration and poor contact, in multiple pairs of positive and negativeelectrical connection terminals 13a, 13b in a charge/discharge power source 12 of a charge/discharge inspection device 11 for simultaneously charging and discharging inspecting (testing) multiplesecondary batteries 10. Here, the number ofsecondary batteries 10 that can be connected to one charge/discharge power source 12 can be selected as appropriate. Note that Fig. 1 shows a case in which the charge/discharge inspection device 11 has one charge/discharge power source 12, but the charge/discharge inspection device can have multiple charge/discharge power sources, and the number can be selected as appropriate.

図１に示すように、充放電検査装置１１には、コントローラ（デジタルデータ収集器）１４を介して管理パソコン１５が接続されている。また、充放電検査装置１１は、充放電電源１２の各二次電池１０に対する出力電圧を測定する出力電圧測定器１７と、各二次電池１０の正負の電極１８ａ、１８ｂ間の電池電圧を測定する電池電圧測定器１９と、充放電電源１２の二次電池１０毎の出力電流を測定する出力電流測定器２０と、各二次電池１０の電池温度を測定する温度センサー２１を有している。これにより、管理パソコン１５は、複数の二次電池１０の充放電検査中に取得される充放電電源１２の出力電圧、各二次電池１０の正負の電極１８ａ、１８ｂ間の電池電圧、充放電電源１２の出力電流及び各二次電池１０の電池温度のそれぞれの測定データを時系列で蓄積することができる。そして、管理パソコン１５は、これらの各測定データに基づいて充放電電源１２の各組の正負の電気接続端子１３ａ、１３ｂの劣化傾向及び充放電電源１２の各組の正負の電気接続端子１３ａ、１３ｂと各二次電池１０の正負の電極１８ａ、１８ｂとの接触不良の有無を診断することができる。As shown in FIG. 1, the charge/discharge inspection device 11 is connected to amanagement computer 15 via a controller (digital data collector) 14. The charge/discharge inspection device 11 also has anoutput voltage meter 17 for measuring the output voltage of the charge/discharge power source 12 for eachsecondary battery 10, abattery voltage meter 19 for measuring the battery voltage between the positive andnegative electrodes 18a, 18b of eachsecondary battery 10, an outputcurrent meter 20 for measuring the output current of eachsecondary battery 10 of the charge/discharge power source 12, and atemperature sensor 21 for measuring the battery temperature of eachsecondary battery 10. As a result, themanagement computer 15 can accumulate the measurement data of the output voltage of the charge/discharge power source 12, the battery voltage between the positive andnegative electrodes 18a, 18b of eachsecondary battery 10, the output current of the charge/discharge power source 12, and the battery temperature of eachsecondary battery 10, which are acquired during the charge/discharge inspection of multiplesecondary batteries 10, in chronological order. Based on these measurement data, themanagement computer 15 can diagnose the deterioration tendency of each pair of positive and negativeelectrical connection terminals 13a, 13b of the charging/discharging power source 12 and the presence or absence of poor contact between each pair of positive and negativeelectrical connection terminals 13a, 13b of the charging/discharging power source 12 and the positive andnegative electrodes 18a, 18b of eachsecondary battery 10.

具体的には、例えば、充放電電源１２の各二次電池１０に対する出力電圧と、充放電電源１２の各組の正負の電気接続端子１３ａ、１３ｂと電気接続された各二次電池１０の電池電圧との電圧差の経時変化（上昇量）から、充放電電源１２の各組の正負の電気接続端子１３ａ、１３ｂの異常（劣化傾向及び接触不良）の有無を診断することができる。より具体的には、各充放電電源１２の各組の正負の電気接続端子１３ａ、１３ｂのうち、前述の電圧差が経時的に上昇傾向にある正負の電気接続端子１３ａ、１３ｂは劣化傾向にあると診断することができ、電圧差が突発的（急激）に変動した電気接続端子１３ａ、１３ｂは電極１８ａ、１８ｂとの接触不良若しくはその他の不具合（故障）が発生していると診断することができる。
なお、各測定データの蓄積は、充放電電源１２が設定電流（予め設定された同一（一定）の電流）を出力している下で行われることにより、それぞれの電気接続端子１３ａ、１３ｂの異常（劣化傾向及び接触不良）の有無を正確に診断することができる。特に、充放電検査装置が複数の充放電電源を備える場合、各充放電電源が同一の設定電流を出力している下で各測定データの蓄積が行われることにより、全ての電気接続端子の異常の有無を同一条件で正確に診断することができる。Specifically, for example, the presence or absence of abnormalities (deterioration tendency and poor contact) in each pair of positive and negativeelectrical connection terminals 13a, 13b of the charging/discharging power source 12 can be diagnosed from the change over time (amount of increase) in the voltage difference between the output voltage of the charging/discharging power source 12 for eachsecondary battery 10 and the battery voltage of eachsecondary battery 10 electrically connected to each pair of positive and negativeelectrical connection terminals 13a, 13b of the charging/discharging power source 12. More specifically, among the positive and negativeelectrical connection terminals 13a, 13b of each pair of the charging/discharging power source 12, the positive and negativeelectrical connection terminals 13a, 13b in which the above-mentioned voltage difference tends to increase over time can be diagnosed as being prone to deterioration, and theelectrical connection terminals 13a, 13b in which the voltage difference has suddenly (suddenly) changed can be diagnosed as having poor contact with theelectrodes 18a, 18b or other malfunctions (failures).
The measurement data is accumulated while the charge/discharge power source 12 is outputting a set current (the same (constant) current set in advance), so that the presence or absence of abnormalities (deterioration tendency and poor contact) in each of theelectrical connection terminals 13a, 13b can be accurately diagnosed. In particular, when the charge/discharge inspection device is equipped with multiple charge/discharge power sources, the measurement data is accumulated while each charge/discharge power source is outputting the same set current, so that the presence or absence of abnormalities in all of the electrical connection terminals can be accurately diagnosed under the same conditions.

また、複数の二次電池１０の充放電検査中に、充放電電源１２の二次電池１０毎の出力電流の測定データを同時に時系列で蓄積することにより、充放電電源１２の各二次電池１０に対する出力電圧及び各二次電池１０の電池電圧の各測定データが測定された時の充放電電源１２の二次電池１０毎の出力電流を確認することができ、設定電流出力下で測定されたものか検証することができる。また、充放電電源１２の各二次電池１０に対する出力電圧及び各二次電池１０の電池電圧の各測定データが一定の設定電流出力下で測定されたものでない場合でも、充放電電源１２の二次電池１０毎の出力電流が等しい時の充放電電源１２の各二次電池１０に対する出力電圧及び各二次電池１０の電池電圧の測定データを抽出することにより、電気接続端子１３ａ、１３ｂの異常の有無を正確に把握することができる。In addition, by accumulating measurement data of the output current of eachsecondary battery 10 of the charging/discharging power source 12 in a time series at the same time during the charging/discharging inspection of the multiplesecondary batteries 10, it is possible to confirm the output current of eachsecondary battery 10 of the charging/discharging power source 12 at the time when each measurement data of the output voltage of the charging/discharging power source 12 for eachsecondary battery 10 and the battery voltage of eachsecondary battery 10 was measured, and it is possible to verify whether the measurement was performed under a set current output. In addition, even if each measurement data of the output voltage of the charging/discharging power source 12 for eachsecondary battery 10 and the battery voltage of eachsecondary battery 10 was not measured under a constant set current output, it is possible to accurately grasp the presence or absence of an abnormality in theelectrical connection terminals 13a, 13b by extracting the measurement data of the output voltage of the charging/discharging power source 12 for eachsecondary battery 10 and the battery voltage of eachsecondary battery 10 when the output current of eachsecondary battery 10 of the charging/discharging power source 12 is equal.

管理パソコン１５は、電気接続端子１３ａ、１３ｂに異常が発生している場合に、モニタ及び／又はスピーカー（いずれも図示せず）等を用いて、作業者に通知することができる。例えば、警告の文字や記号をモニタ上に表示させたり、警告音をスピーカーから流したりして、異常を知らせ、電気接続端子１３ａ、１３ｂの交換やメンテナンスを促すことができる。
そして、充放電電源１２の各組の正負の電気接続端子１３ａ、１３ｂが新品に交換された直後に取得される充放電電源１２の各二次電池１０に対する出力電圧と、充放電電源１２の各組の正負の電気接続端子１３ａ、１３ｂと電気接続された各二次電池１０の電池電圧との電圧差を初期値（正常値若しくは基準値）として、前述の電圧差の経時変化を求めることにより、充放電電源１２の各出力端子から各二次電池１０の電極１８ａ、１８ｂに至るまでの配線抵抗値（ライン抵抗値）の影響を受けることなく、各組の正負の電気接続端子１３ａ、１３ｂの異常の有無を正確に検出することができ、特に、各二次電池１０の正負の電極１８ａ、１８ｂとの接触不良の有無を高精度で検出することができる。
また、前述の電圧差の経時変化に加え、各温度センサー２１で測定される各二次電池１０の電池温度の測定データを蓄積（監視）することにより、充放電電源１２の各組の正負の電気接続端子１３ａ、１３ｂと各二次電池１０の正負の電極１８ａ、１８ｂとの接触不良による発熱異常を検知することができ、接触不良診断の精度をさらに向上させることができる。When an abnormality occurs in theelectrical connection terminals 13a, 13b, themanagement computer 15 can notify an operator by using a monitor and/or a speaker (neither of which are shown), etc. For example, it can notify an operator of the abnormality by displaying warning characters or symbols on the monitor or playing a warning sound from the speaker, and prompt the operator to replace or perform maintenance on theelectrical connection terminals 13a, 13b.
Then, by setting the voltage difference between the output voltage of the charging/discharging power source 12 for eachsecondary battery 10 obtained immediately after each set of positive and negativeelectrical connection terminals 13a, 13b of the charging/discharging power source 12 is replaced with new ones, and the battery voltage of eachsecondary battery 10 electrically connected to each set of positive and negativeelectrical connection terminals 13a, 13b of the charging/discharging power source 12 as an initial value (normal value or reference value), and determining the change over time of the above-mentioned voltage difference, it is possible to accurately detect the presence or absence of an abnormality in each set of positive and negativeelectrical connection terminals 13a, 13b without being affected by the wiring resistance value (line resistance value) from each output terminal of the charging/discharging power source 12 to theelectrodes 18a, 18b of eachsecondary battery 10, and in particular, the presence or absence of poor contact with the positive andnegative electrodes 18a, 18b of eachsecondary battery 10 can be detected with high accuracy.
In addition to the change over time in the voltage difference described above, by accumulating (monitoring) measurement data on the battery temperature of eachsecondary battery 10 measured by eachtemperature sensor 21, it is possible to detect abnormal heat generation due to poor contact between each set of positive and negativeelectrical connection terminals 13a, 13b of the charging/discharging power source 12 and the positive andnegative electrodes 18a, 18b of eachsecondary battery 10, thereby further improving the accuracy of poor contact diagnosis.

以上、本発明の実施の形態を説明したが、本発明は何ら上記した実施の形態に記載の構成に限定されるものではなく、特許請求の範囲に記載されている事項の範囲内で考えられるその他の実施の形態や変形例も含むものである。
例えば、上記実施の形態では、充放電電源の出力電圧と、充放電電源の各組の正負の電気接続端子と電気接続された各二次電池の電池電圧との電圧差の経時変化（上昇量）から、電気接続端子の異常の有無を診断する代わりに、電圧差の経時変化の微分値（上昇速度）を求めて、電気接続端子の異常の有無を診断することができる。この他にも、蓄積された複数種類の測定データを組合せたり、各種の演算（加減乗除のほか微分、積分等も含む）により測定データを加工したりして、異常診断に利用することができる。
また、充放電電源の電気接続端子の形態は特に限定されるものではなく、二次電池の電極と電気接続できる形態を適宜、選択することができ、二次電池の電極の形態に応じて、プローブピンのほか、クリップ又は丸端子等の各種形態を採用することができる。
上記実施の形態では、充放電検査装置に対して、管理パソコンとコントローラを独立させたが、コントローラは管理パソコン又は充放電検査装置に組み込むこともできる。Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations described in the above embodiments, and also includes other embodiments and variations that can be considered within the scope of the matters described in the claims.
For example, in the above embodiment, instead of diagnosing the presence or absence of an abnormality in the electrical connection terminals from the change over time (amount of increase) in the voltage difference between the output voltage of the charging/discharging power supply and the battery voltage of each secondary battery electrically connected to the positive and negative electrical connection terminals of each pair of the charging/discharging power supply, the presence or absence of an abnormality in the electrical connection terminals can be diagnosed by obtaining the differential value (rate of increase) of the change over time in the voltage difference. In addition, it is possible to combine multiple types of accumulated measurement data, or process the measurement data by various calculations (including differentiation, integration, etc. in addition to addition, subtraction, multiplication, and division) and use the data for abnormality diagnosis.
In addition, the shape of the electrical connection terminal of the charge/discharge power source is not particularly limited, and a shape that can be electrically connected to the electrode of the secondary battery can be selected as appropriate. Depending on the shape of the electrode of the secondary battery, various shapes such as a probe pin, a clip or a round terminal can be adopted.
In the above embodiment, the administration computer and the controller are independent from the charge/discharge inspection device, but the controller can also be incorporated in the administration computer or the charge/discharge inspection device.

１０：二次電池、１１：充放電検査装置、１２：充放電電源、１３ａ、１３ｂ：電気接続端子、１４：コントローラ、１５：管理パソコン、１７：出力電圧測定器、１８ａ、１８ｂ：電極、１９：電池電圧測定器、２０：出力電流測定器、２１：温度センサー10: Secondary battery, 11: Charge/discharge inspection device, 12: Charge/discharge power source, 13a, 13b: Electrical connection terminal, 14: Controller, 15: Management computer, 17: Output voltage meter, 18a, 18b: Electrodes, 19: Battery voltage meter, 20: Output current meter, 21: Temperature sensor

Claims

Translated fromJapanese

複数の二次電池を同時に充放電検査するための充放電検査装置の１又は複数の充放電電源におけるそれぞれの複数組の正負の電気接続端子の異常を個別に検出する充放電検査装置の電気接続端子の異常判定方法であって、
複数の前記二次電池の充放電検査中に取得される前記各充放電電源の出力電圧及び前記各二次電池の正負の電極間の電池電圧の測定データを時系列で蓄積し、該各測定データに基づいて前記各充放電電源の各組の正負の前記電気接続端子の劣化傾向及び前記各充放電電源の各組の正負の前記電気接続端子と前記各二次電池の正負の前記電極との接触不良の有無を診断すると共に、
前記二次電池の充放電検査中に、前記各二次電池の電池温度の測定データを蓄積し、該各電池温度に基づいて前記各充放電電源の各組の正負の前記電気接続端子と前記各二次電池の正負の前記電極との接触不良の有無を診断することを特徴とする充放電検査装置の電気接続端子の異常判定方法。1. A method for determining an abnormality in electrical connection terminals of a charge/discharge inspection device, the method individually detecting abnormalities in each of a plurality of pairs of positive and negative electrical connection terminals in one or a plurality of charge/discharge power sources of a charge/discharge inspection device for simultaneously charging/discharging a plurality of secondary batteries, comprising:
accumulating measurement data of the output voltage of each of the charging/discharging power sources and the battery voltage between the positive and negative electrodes of each of the secondary batteries in a chronological order, which are obtained during a charging/discharging inspection of the multiple secondary batteries, and diagnosing, based on the measurement data, the deterioration tendency of the positive and negative electrical connection terminals of each set of the charging/discharging power sources and the presence or absence of poor contact between the positive and negative electrical connection terminals of each set of the charging/discharging power sources and the positive and negative electrodes of each of the secondary batteries;
A method for determining an abnormality in the electrical connection terminals of a charge/discharge inspection device, characterized in that during charge/discharge inspection of the secondary batteries, measurement data of the battery temperature of each of the secondary batteries is accumulated, and based on the battery temperatures, the presence or absence of poor contact between the positive and negative electrical connection terminals of each set of each of the charge/discharge power sources and the positive and negative electrodes of each of the secondary batteries is diagnosed .

請求項１記載の充放電検査装置の電気接続端子の異常判定方法において、前記各充放電電源の各組の正負の前記電気接続端子の劣化傾向の有無は、前記各充放電電源の出力電圧と、前記各充放電電源の各組の正負の前記電気接続端子と電気接続された前記各二次電池の電池電圧との電圧差の経時変化から診断することを特徴とする充放電検査装置の電気接続端子の異常判定方法。In the method for determining an abnormality in the electrical connection terminals of a charge/discharge inspection device according to claim 1, the presence or absence of a deterioration tendency of the positive and negative electrical connection terminals of each pair of the charge/discharge power sources is diagnosed from the change over time in the voltage difference between the output voltage of each of the charge/discharge power sources and the battery voltage of each of the secondary batteries electrically connected to the positive and negative electrical connection terminals of each pair of the charge/discharge power sources.

請求項２記載の充放電検査装置の電気接続端子の異常判定方法において、前記各充放電電源の各組の正負の前記電気接続端子のうち、前記電圧差が経時的に上昇傾向にある正負の前記電気接続端子が劣化傾向にあると診断することを特徴とする充放電検査装置の電気接続端子の異常判定方法。The method for determining an abnormality in the electrical connection terminals of a charge/discharge inspection device according to claim 2, characterized in that, of the positive and negative electrical connection terminals of each pair of the charge/discharge power sources, the positive and negative electrical connection terminals in which the voltage difference is increasing over time are diagnosed as being in a deterioration state.

請求項２又は３記載の充放電検査装置の電気接続端子の異常判定方法において、前記電圧差の経時変化は、前記各充放電電源の各組の正負の前記電気接続端子が新品に交換された直後に取得される、前記各充放電電源の出力電圧と、前記各充放電電源の各組の正負の前記電気接続端子と電気接続された前記各二次電池の電池電圧との電圧差を初期値として求められることを特徴とする充放電検査装置の電気接続端子の異常判定方法。In the method for determining an abnormality in the electrical connection terminals of a charge/discharge inspection device according to claim 2 or 3, the change in the voltage difference over time is determined using as an initial value the voltage difference between the output voltage of each of the charge/discharge power sources, obtained immediately after the positive and negative electrical connection terminals of each pair of the charge/discharge power sources are replaced with new ones, and the battery voltage of each of the secondary batteries electrically connected to the positive and negative electrical connection terminals of each pair of the charge/discharge power sources.

請求項１～４のいずれか１記載の充放電検査装置の電気接続端子の異常判定方法において、前記各測定データの蓄積は、前記各充放電電源が同一の設定電流を出力している下で行われることを特徴とする充放電検査装置の電気接続端子の異常判定方法。A method for determining an abnormality in an electrical connection terminal of a charge/discharge inspection device according to any one of claims 1 to 4, characterized in that the accumulation of each measurement data is performed while each of the charge/discharge power sources is outputting the same set current.

請求項１～５のいずれか１記載の充放電検査装置の電気接続端子の異常判定方法において、前記二次電池の充放電検査中に、前記各充放電電源の出力電流の測定データを時系列で蓄積することを特徴とする充放電検査装置の電気接続端子の異常判定方法。
6. The method for determining an abnormality in an electrical connection terminal of a charge/discharge inspection device according to any one of claims 1 to 5, further comprising accumulating measurement data of the output current of each of the charge/discharge power sources in chronological order during the charge/discharge inspection of the secondary battery.