JP2000123883A - Battery failure detecting method and battery failure detecting system - Google Patents
Battery failure detecting method and battery failure detecting systemInfo
- Publication number
- JP2000123883A JP2000123883A JP10288414A JP28841498A JP2000123883A JP 2000123883 A JP2000123883 A JP 2000123883A JP 10288414 A JP10288414 A JP 10288414A JP 28841498 A JP28841498 A JP 28841498A JP 2000123883 A JP2000123883 A JP 2000123883A
- Authority
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- Japan
- Prior art keywords
- battery
- voltage value
- measured
- failure
- battery unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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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- Secondary Cells (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】 本発明は、例えば複数のナ
トリウム−硫黄単電池を接続してなるブロックのような
電池単位を、少なくとも２以上直列に接続してモジュー
ル電池のような電池列とした場合において、前記電池単
位毎に電池の故障を検出する方法及びシステムに関する
ものである。TECHNICAL FIELD The present invention relates to a case where at least two or more battery units such as blocks formed by connecting a plurality of sodium-sulfur cells are connected in series to form a battery row such as a module battery. And a method and system for detecting a battery failure for each battery unit.
【０００２】[0002]
【従来の技術】 ナトリウム−硫黄単電池（以下、ＮＡ
Ｓ単電池という。）は、一方に陰極活物質である溶融金
属ナトリウム、他方には陽極活物質である溶融硫黄を配
し、両者をナトリウムイオンに対して選択的な透過性を
有するベータアルミナ固体電解質で隔離し、３００〜３
５０℃で作動させる高温二次電池である。2. Description of the Related Art A sodium-sulfur cell (hereinafter referred to as NA)
It is called S cell. ) Is provided with molten metal sodium as a cathode active material on one side and molten sulfur as an anode active material on the other side, and both are separated by a beta alumina solid electrolyte having selective permeability to sodium ions, 300-3
It is a high temperature secondary battery operated at 50 ° C.
【０００３】 通常、ＮＡＳ単電池は、複数本を電気的
に接続したモジュール電池の形で用いられるが、その運
転は、図３に示すように、第一休止段階Ｐ1、放電段階
Ｐ2、第二休止段階Ｐ3、充電段階Ｐ4からなるサイクル
を繰り返して行われる。[0003] Normally, NAS cells are used in the form of a module battery in which a plurality of cells are electrically connected. As shown in FIG. 3, the NAS cells operate in a first pause stage P 1 , a discharge stage P 2 , The cycle including the second pause stage P 3 and the charging stage P 4 is repeatedly performed.
【０００４】 放電段階Ｐ2においては溶融ナトリウム
が電子を放出してナトリウムイオンとなり、これが固体
電解質管を透過して陽極側に移動し、硫黄及び外部回路
を通ってきた電子と反応して多硫化ナトリウムを生成
し、２Ｖ程度の電圧を発生させる。一方、充電段階Ｐ4
においては、放電とは逆にナトリウム及び硫黄の生成反
応が起こり、電池が充電される。In the discharge stage P 2 , the molten sodium emits electrons to become sodium ions, which pass through the solid electrolyte tube and move to the anode side, react with sulfur and electrons passing through the external circuit, and react with polysulfide. Generates sodium and generates a voltage of about 2V. On the other hand, charging stage P 4
In, the reaction of producing sodium and sulfur occurs in reverse to the discharge, and the battery is charged.
【０００５】 モジュール電池は、例えば図２に示すよ
うに複数のナトリウム−硫黄単電池２を直列に接続した
ストリング３を、並列に接続してブロック４を構成し、
更に当該ブロック４を少なくとも２以上直列に接続した
上で断熱容器５に収容された構造を採る。このようなモ
ジュール電池の故障を検出する方法としては、各ブロッ
クの放電深度を比較することにより、電池の故障を検出
する方法が開示されている（特開平３−１５８７８１号
公報）。In the module battery, for example, as shown in FIG. 2, a string 4 in which a plurality of sodium-sulfur cells 2 are connected in series is connected in parallel to form a block 4,
Further, a structure is adopted in which at least two or more of the blocks 4 are connected in series, and the blocks 4 are housed in a heat insulating container 5. As a method of detecting a failure of such a module battery, a method of detecting a failure of a battery by comparing the discharge depth of each block is disclosed (Japanese Patent Laid-Open No. 3-15881).
【０００６】 当該方法は、モジュール電池１を構成す
るブロック４毎に電池の故障の有無を判断するため、ブ
ロック４を構成する個々の単電池２毎に故障を検出する
方法と比較して、装置が複雑化せず、また、製造コスト
も低減できる点において好適な故障検出方法である。In this method, the presence / absence of a battery failure is determined for each of the blocks 4 constituting the module battery 1, so that the apparatus is compared with a method of detecting a failure for each of the individual cells 2 constituting the block 4. This is a preferred failure detection method in that the method does not complicate and the manufacturing cost can be reduced.
【０００７】[0007]
【発明が解決しようとする課題】 しかしながら、当該
方法においては、まず、各ブロック４における電圧値を
測定し、当該測定電圧値から各ブロック４の放電深度を
算出し、各ブロック４の放電深度を比較することによ
り、ブロック内の電池の故障の有無を検出していた。従
って、検出方法が複雑であることに起因して、検出シス
テムが高価となる点に問題があった。However, in the method, first, the voltage value in each block 4 is measured, the discharge depth of each block 4 is calculated from the measured voltage value, and the discharge depth of each block 4 is calculated. By comparing, the presence or absence of the failure of the battery in the block was detected. Therefore, there is a problem in that the detection system is expensive due to the complicated detection method.
【０００８】 本発明は、このような状況に鑑みてなさ
れたものであり、その目的とするところは、検出方法が
単純であって、より安価な電池故障の検出方法及び検出
システムを提供することにある。The present invention has been made in view of such circumstances, and an object of the present invention is to provide a simpler detection method and a more inexpensive battery failure detection method and detection system. It is in.
【０００９】[0009]
【課題を解決するための手段】 即ち、本発明によれ
ば、電池単位を少なくとも２以上直列に接続してなる電
池列において、電池単位毎に電池の故障を検出する方法
であって、各電池単位の電圧値を測定し、当該測定電圧
値、当該測定電圧値の各電池単位間での電圧差、或いは
当該測定電圧値と設定電圧値との電圧差が、設定範囲内
にあるか否かを判定することにより、故障を検出するこ
とを特徴とする電池故障検出方法が提供される。That is, according to the present invention, there is provided a method for detecting a failure of a battery for each battery unit in a battery row in which at least two battery units are connected in series. Measure the voltage value of the unit and determine whether the measured voltage value, the voltage difference between the battery units of the measured voltage value, or the voltage difference between the measured voltage value and the set voltage value is within the set range. The battery failure detection method is characterized in that a failure is detected by determining.
【００１０】 本発明においては、前記の電池単位が、
複数のナトリウム−硫黄単電池を直列に接続してなるス
トリングを、更に並列に接続してなるブロックであっ
て、電池列が、当該ブロックを、少なくとも２以上直列
に接続し断熱容器に収容してなるモジュール電池である
ことが好ましく、電池単位が、前記のモジュール電池で
あって、電池列が当該モジュール電池を少なくとも２以
上直列に接続してなるモジュール電池列であってもよ
い。In the present invention, the battery unit is
A block in which a string formed by connecting a plurality of sodium-sulfur cells in series is further connected in parallel, and a battery row includes at least two or more blocks connected in series and accommodated in a heat insulating container. Preferably, the battery unit is the above-described module battery, and the battery row may be a module battery row formed by connecting at least two or more module batteries in series.
【００１１】 また、本発明の検出方法としては、各電
池単位の電圧値を測定し、当該測定電圧値が設定範囲内
であるか否かを判定し、当該測定電圧値が設定範囲外で
ある場合に当該電池単位を故障として検出する方法、或
いは各電池単位の電圧値を測定し、当該測定電圧値を各
電池単位間で比較して電圧差を算出し、当該電圧差が設
定範囲内であるか否かを判定し、当該電圧差が設定範囲
外である場合に、当該比較した電池単位のうち測定電圧
値が低い電池単位を故障として検出する検出方法が挙げ
られる。後者の検出方法では、各電池単位間で測定電圧
値を比較する際に、２の電池単位を１組として測定電圧
値を比較することが好ましい。Further, as a detection method of the present invention, a voltage value of each battery unit is measured, it is determined whether or not the measured voltage value is within a set range, and the measured voltage value is out of the set range. In such a case, a method of detecting the battery unit as a failure, or measuring the voltage value of each battery unit, comparing the measured voltage value between each battery unit to calculate a voltage difference, and determining that the voltage difference is within a set range. There is a detection method of determining whether or not there is, and if the voltage difference is out of the set range, detecting a battery unit having a lower measured voltage value among the compared battery units as a failure. In the latter detection method, when comparing the measured voltage values between the respective battery units, it is preferable to compare the measured voltage values using two battery units as one set.
【００１２】 更に、本発明の検出方法としては、各電
池単位の電圧値を測定し、当該測定電圧値を設定電圧値
との間で比較して電圧差を算出し、当該電圧差が設定範
囲内であるか否かを判定し、当該電圧差が設定範囲外で
ある場合に当該電池単位を故障として検出する方法を採
ってもよい。当該方法における設定電圧値としては、同
一電池単位における過去の測定電圧値、全ての電池単位
についての平均電圧値を用いることができ、最も測定電
圧値の低い電池単位以外の全ての電池単位についての平
均電圧値を用いることが更に好ましい。Further, as a detection method of the present invention, a voltage value of each battery unit is measured, and the measured voltage value is compared with a set voltage value to calculate a voltage difference. A method may be adopted in which it is determined whether or not the voltage difference is within the range, and when the voltage difference is out of the set range, the battery unit is detected as a failure. As the set voltage value in the method, a past measured voltage value in the same battery unit, an average voltage value for all battery units can be used, and for all battery units except the battery unit with the lowest measured voltage value, More preferably, an average voltage value is used.
【００１３】 上述の何れの検出方法においても、測定
する電圧値は放電末の開放電圧値であることが好まし
く、放電終了から充電開始までの休止期間内であって、
かつ、開放電圧値が安定化した後に開放電圧値を測定す
ることが更に好ましい。具体的には、放電終了時を基準
として当該放電終了後３０分乃至２時間において開放電
圧値を測定することが特に好ましいが、充電開始時を基
準として開放電圧値の測定時を決定してもよい。In any of the above-described detection methods, the voltage value to be measured is preferably an open-circuit voltage value at the end of discharge, and is within a pause period from the end of discharge to the start of charging.
Further, it is more preferable to measure the open-circuit voltage value after the open-circuit voltage value is stabilized. Specifically, it is particularly preferable to measure the open-circuit voltage value 30 minutes to 2 hours after the end of the discharge on the basis of the end of the discharge. Good.
【００１４】 また、本発明によれば、電池単位を少な
くとも２以上直列に接続してなる電池列において、電池
単位毎に電池の故障を検出するシステムであって、各電
池単位の電圧値を測定するための電圧計と、当該測定電
圧値が設定範囲内であるか否かを判定するための判定器
と、当該測定電圧値が設定範囲外である場合に、当該電
池単位の故障を警告するための警報手段及び／又は当該
電池単位の故障を表示するための表示手段を備えたこと
を特徴とする電池故障検出システムが提供される。Further, according to the present invention, there is provided a system for detecting a failure of a battery for each battery unit in a battery array formed by connecting at least two battery units in series, and measuring a voltage value of each battery unit. A voltmeter, a determiner for determining whether the measured voltage value is within a set range, and a warning of a failure of the battery unit when the measured voltage value is outside the set range. And / or a display means for displaying the failure of the battery unit.
【００１５】 本発明の検出システムとしては、電池単
位毎の測定電圧値の電圧差、或いは電池単位毎の測定電
圧値と設定電圧値との電圧差を算出するための比較器を
備え、判定器を、当該電圧差が設定範囲内であるか否か
を判定するためのものとしたものであることが好まし
く、各電池単位の過去の測定電圧値を記憶するための記
憶手段及び／又は電池単位毎の測定電圧値の平均電圧値
を算出するための演算手段を備えたものであることが更
に好ましい。The detection system of the present invention includes a comparator for calculating a voltage difference between a measured voltage value for each battery unit or a voltage difference between a measured voltage value for each battery unit and a set voltage value. Is preferably used to determine whether the voltage difference is within a set range, and a storage unit for storing past measured voltage values of each battery unit and / or a battery unit It is further preferable that the apparatus further comprises a calculating means for calculating an average voltage value of the measured voltage values for each.
【００１６】[0016]
【発明の実施の形態】 本発明においては、各電池単位
の電圧値を測定し、当該測定電圧値、当該測定電圧値の
各電池単位間での電圧差、或いは当該測定電圧値と設定
電圧値との電圧差が、設定範囲内にあるか否かを判定す
ることにより、故障を検出する。従って、測定電圧値か
ら放電深度を算出することなく故障を検出することがで
き、検出方法が単純で、安価な検出システムを提供する
ことが可能である。以下、本発明について説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a voltage value of each battery unit is measured, and the measured voltage value, a voltage difference between the battery units of the measured voltage value, or the measured voltage value and a set voltage value are measured. A failure is detected by determining whether or not the voltage difference between the two is within a set range. Therefore, a failure can be detected without calculating the depth of discharge from the measured voltage value, and a simple detection method and an inexpensive detection system can be provided. Hereinafter, the present invention will be described.
【００１７】 本発明の方法は、例えば複数のナトリウ
ム−硫黄単電池を接続してなるブロックのような電池単
位を、少なくとも２以上直列に接続してモジュール電池
のような電池列に対して適用できる。本発明において
「電池単位」とは、通常、少なくとも２以上の単電池を
電気的に接続した単電池からなるユニットをいい、「電
池列」とは、「電池単位」を少なくとも２以上直列に接
続してなるユニットをいう。The method of the present invention can be applied to a battery array such as a module battery by connecting at least two or more battery units such as a block formed by connecting a plurality of sodium-sulfur cells in series. . In the present invention, “battery unit” generally refers to a unit composed of unit cells in which at least two or more unit cells are electrically connected, and “battery row” refers to a unit in which at least two or more unit cells are connected in series. A unit consisting of
【００１８】 具体的には例えば、複数のナトリウム−
硫黄単電池を直列に接続してなるストリングを、更に並
列に接続してなるブロックを「電池単位」、当該ブロッ
クを、少なくとも２以上直列に接続し断熱容器に収容し
てなるモジュール電池を「電池列」として本発明を適用
することが可能である。Specifically, for example, a plurality of sodium-
A block formed by connecting strings of sulfur cells in series and a block formed by further connecting them in parallel is referred to as a "battery unit." A module battery formed by connecting at least two or more blocks in series and housed in a heat insulating container is referred to as a "battery." It is possible to apply the invention as a "row".
【００１９】 また、モジュール電池を更に複数個直列
に接続した部分を有するバッテリーシステムにおいて
は、前記のモジュール電池を電池単位とし、当該モジュ
ール電池を少なくとも２以上直列に接続してなるモジュ
ール電池列を電池列として本発明を適用してもよい。即
ち、本発明における「電池単位」は、単独で電池として
の機能を発揮し得る限りにおいてユニットの大きさは特
に限定されず、場合によっては単電池自体も「電池単
位」となり得る。Further, in a battery system having a portion in which a plurality of module batteries are further connected in series, the above-mentioned module batteries are used as battery units, and at least two or more of the module batteries are connected in series to form a battery. The present invention may be applied as a row. That is, the size of the “battery unit” in the present invention is not particularly limited as long as the unit alone can exhibit the function as a battery. In some cases, the unit cell itself may be a “battery unit”.
【００２０】 本発明の方法は、上述の電池列において
電池単位毎に電池の故障を検出するものである。従っ
て、検出方法が単純であることに加え、多数の単電池が
複合的に接続されてなる大規模なバッテリーシステムに
おいても、故障が存する電池単位を特定でき、当該電池
単位のみを修理・調整等行えば済むようになる。以下、
本発明の検出方法について例示的に説明する。The method of the present invention detects a battery failure for each battery unit in the above-described battery row. Therefore, in addition to the simple detection method, even in a large-scale battery system in which a large number of cells are connected in a complex manner, it is possible to specify a battery unit having a failure and to repair / adjust only the battery unit. You just need to do it. Less than,
The detection method of the present invention will be exemplarily described.
【００２１】（第１の検出方法）本発明における第１の
検出方法は、各電池単位の電圧値を測定し、当該測定電
圧値が設定範囲内にあるか否かを判定し、当該測定電圧
値が設定範囲外である場合に故障として検出する方法で
ある。(First Detection Method) In a first detection method according to the present invention, a voltage value of each battery is measured, it is determined whether or not the measured voltage value is within a set range, and the measured voltage value is determined. This is a method of detecting as a failure when the value is out of the setting range.
【００２２】 各電池単位の電圧値を測定した際に、電
池単位を構成する単電池に故障があれば当該電池単位の
測定電圧値が低下する。従って、各電池単位の正常な電
圧値の範囲を予め設定しておくことにより、ある電池単
位の測定電圧値が設定電圧値の範囲内であれば正常、範
囲外である場合に異常として故障を検出することが可能
となる。When the voltage value of each battery unit is measured, if the unit cell constituting the battery unit has a failure, the measured voltage value of the battery unit decreases. Therefore, by setting a normal voltage value range for each battery unit in advance, if the measured voltage value for a certain battery unit is within the range of the set voltage value, it is normal. It becomes possible to detect.
【００２３】（第２の検出方法）本発明における第２の
検出方法は、各電池単位の電圧値を測定し、当該測定電
圧値を電池単位間で比較して電圧差を算出し、当該電圧
差が設定範囲内にあるか否かを判定し、当該電圧差が設
定範囲外である場合に、当該比較した電池単位のうち測
定電圧値が低い電池単位を故障として検出する検出方法
である。(Second Detection Method) In a second detection method according to the present invention, a voltage value of each battery unit is measured, and the measured voltage value is compared between the battery units to calculate a voltage difference. This is a detection method in which it is determined whether or not the difference is within a set range, and when the voltage difference is outside the set range, a battery unit having a lower measured voltage value among the compared battery units is detected as a failure.
【００２４】 各電池単位の電圧値を測定した際には、
単電池に故障がある電池単位の測定電圧値のみが低下
し、他の正常な電池単位の測定電圧値は低下しない。従
って、各電池単位間の正常な電圧差の範囲を予め設定し
ておくことにより、測定電圧値を電池単位間で比較した
電圧差が設定範囲内であれば双方の電池単位とも正常、
範囲外である場合には当該比較した電池単位のうち測定
電圧値が低い電池単位を異常として故障を検出すること
が可能となる。When measuring the voltage value of each battery unit,
Only the measured voltage value of a battery unit in which a unit cell has a failure decreases, and the measured voltage values of other normal battery units do not decrease. Therefore, by setting the range of the normal voltage difference between each battery unit in advance, if the voltage difference obtained by comparing the measured voltage values between the battery units is within the set range, both battery units are normal,
If it is out of the range, it becomes possible to detect a failure as a battery unit having a lower measured voltage value among the compared battery units and detect a failure.
【００２５】 第２の検出方法は、同一条件で通電され
た電池単位の間で電圧差を算出するため、故障の検出精
度を向上できる点において第１の検出方法より好適な検
出方法である。但し、第２の検出方法において、全ての
電池単位間で測定電圧値を比較しようとすると検出シス
テムが複雑化するため、２の電池単位を１組として測定
電圧値を比較することが好ましい。The second detection method is a more preferable detection method than the first detection method in that a voltage difference is calculated between battery units that are energized under the same condition, so that the accuracy of detecting a failure can be improved. However, in the second detection method, if it is attempted to compare the measured voltage values among all the battery units, the detection system becomes complicated. Therefore, it is preferable to compare the measured voltage values with two battery units as one set.
【００２６】 上記の方法を採用する場合においては、
比較する２の電池単位で同時に１の電池単位が故障した
ような場合には測定電圧値に顕著な差が生じず、故障を
検出することができない。しかしながら、比較する２の
電池単位が同時に故障する確率は極めて低いため、シス
テムの簡略化と前記の確率を比較考量した上でシステム
を構築すればよい。When adopting the above method,
If one battery unit fails at the same time in two battery units to be compared, no significant difference occurs in the measured voltage value, and the failure cannot be detected. However, since the probability that two battery units to be compared will fail at the same time is extremely low, the system may be constructed after simplifying the system and weighing the probability.
【００２７】（第３の検出方法）本発明における第３の
検出方法は、各電池単位の電圧値を測定し、当該測定電
圧値を設定電圧値との間で比較して電圧差を算出し、当
該電圧差が設定範囲内であるか否かを判定し、当該電圧
差が設定範囲外である場合に当該電池単位を故障として
検出する方法である。(Third Detection Method) In a third detection method according to the present invention, a voltage difference is calculated by measuring a voltage value of each battery unit and comparing the measured voltage value with a set voltage value. In this method, it is determined whether or not the voltage difference is within a set range, and if the voltage difference is outside the set range, the battery unit is detected as a failure.
【００２８】 各電池単位の電圧値を測定した際に、電
池単位を構成する単電池に故障があれば当該電池単位の
測定電圧値と正常な電圧値との電圧差は大きくなる。従
って、各電池単位の正常な電圧値、及び当該電圧値から
算出される正常な電圧差の範囲を予め設定しておくこと
により、ある電池単位の測定電圧値と設定電圧値との間
で比較した電圧差が設定範囲内であれば正常、範囲外で
ある場合に異常として故障を検出することが可能とな
る。When the voltage value of each battery unit is measured, if a unit cell constituting the battery unit has a failure, the voltage difference between the measured voltage value of the battery unit and a normal voltage value increases. Therefore, by setting in advance the normal voltage value of each battery unit and the range of the normal voltage difference calculated from the voltage value, the measured voltage value of a certain battery unit can be compared with the set voltage value. If the detected voltage difference is within the set range, it is normal, and if it is out of the range, it is possible to detect a failure as an abnormality.
【００２９】 第３の方法における設定電圧値として
は、同一電池単位における過去の測定電圧値、例えば１
充放電サイクル前の当該電池単位の測定電圧値を用いる
ことができる。この場合、電池特性が等しい、同一の電
池単位の間で電圧差を算出するため、故障の検出精度を
向上できる点において好適な検出方法である。As the set voltage value in the third method, a past measured voltage value in the same battery unit, for example, 1
The measured voltage value of the battery unit before the charge / discharge cycle can be used. In this case, since the voltage difference is calculated between the same battery units having the same battery characteristics, this is a suitable detection method in that the accuracy of detecting a failure can be improved.
【００３０】 また、設定電圧値としては、全ての電池
単位についての平均電圧値を用いてもよい。この場合
は、電池単位の数が多い場合でも、比較する設定電圧値
が１つとなり、検出システムを簡略化できる点において
好ましい。As the set voltage value, an average voltage value for all battery units may be used. In this case, even when the number of battery units is large, the number of set voltage values to be compared is one, which is preferable in that the detection system can be simplified.
【００３１】 なお、最も測定電圧値の低い電池単位以
外の全ての電池単位についての平均電圧値を用いると、
故障の検出精度を向上できる点において更に好ましい。
故障の蓋然性が高い電池単位の電圧値を除外した平均電
圧値を用いているからである。When the average voltage value of all battery units other than the battery unit with the lowest measured voltage value is used,
It is further preferable in that the accuracy of detecting a failure can be improved.
This is because the average voltage value excluding the voltage value of each battery unit having a high probability of failure is used.
【００３２】 既述した第１〜第３の何れの検出方法に
おいても、電圧値は電池運転中の電圧値ではなく、開放
電圧値を測定することが好ましい。電池運転中の電圧値
は電池の内部抵抗による電圧降下を含んだ電圧値であ
り、内部抵抗は電池の劣化具合により経時的に変動す
る。従って、電池運転時の電圧値を測定し、或いは比較
しても正確に単電池の故障を検出できない場合が生じ得
る。In any of the first to third detection methods described above, it is preferable that the voltage value is not a voltage value during battery operation but an open-circuit voltage value. The voltage value during the battery operation is a voltage value including a voltage drop due to the internal resistance of the battery, and the internal resistance fluctuates with time due to the degree of deterioration of the battery. Therefore, even if the voltage value during battery operation is measured or compared, a failure of the unit cell may not be accurately detected.
【００３３】 これに対し、開放電圧値は電池の起電圧
そのものであり、電圧値が電池の内部抵抗に影響される
ことがないため、当該電圧値を測定し、比較することに
より単電池の故障をより正確に検出することが可能であ
る。開放電圧値には、図３に示すように放電末の開放電
圧値Ｖ1と充電末の開放電圧値Ｖ2があるが、充電末の開
放電圧値Ｖ2は電池単位内の単電池に故障があっても変
化しないため、放電末の開放電圧値Ｖ1を測定する必要
がある。On the other hand, the open-circuit voltage value is the electromotive voltage of the battery itself, and the voltage value is not influenced by the internal resistance of the battery. Can be detected more accurately. The open-circuit voltage value, it is open voltage value V 2 of the charging end and the open-circuit voltage value V 1 of the discharge end, as shown in FIG. 3, the open-circuit voltage value V 2 of the charging end failure in the unit cells in the battery unit It does not change even if there is, so it is necessary to measure the open-circuit voltage value V 1 at the end of discharge.
【００３４】 放電末の開放電圧値Ｖ1を測定する際に
は、放電終了時ｔ2から充電開始時ｔ3までの休止段階Ｐ
2（即ち、第２休止段階）であって、かつ、開放電圧値
が安定化した後に開放電圧値を測定することが更に好ま
しい。放電終了時ｔ2直後は、活物質の拡散が十分では
なく、陽極側のナトリウム、硫黄或いは多硫化ナトリウ
ムが均一化されていないことに起因して、開放電圧値が
不安定なためである。When measuring the open-circuit voltage value V 1 at the end of discharge, the pause phase P from the end of discharge t 2 to the start of charge t 3 is determined.
2 (i.e., the second resting phase) A, and it is further preferable that the open-circuit voltage value to measure the open-circuit voltage value after the stabilized. Immediately after the discharge end time t 2 , the active material is not sufficiently diffused, and the open-circuit voltage value is unstable due to the non-uniformity of sodium, sulfur or sodium polysulfide on the anode side.
【００３５】 具体的には、放電終了時ｔ2を基準とし
て当該放電終了後３０分乃至２時間において開放電圧値
を測定することが特に好ましい。３０分未満では活物質
の拡散が不十分で電圧値が安定しておらず、２時間を越
えると次の充電に移行してしまう場合が多いからであ
る。Specifically, it is particularly preferable to measure the open-circuit voltage value 30 minutes to 2 hours after the end of the discharge with reference to the end t 2 of the discharge. If the time is less than 30 minutes, the active material is not sufficiently diffused, and the voltage value is not stable. If the time exceeds 2 hours, the battery often shifts to the next charge.
【００３６】 通常、ＮＡＳ電池を用いたモジュール電
池は、電力需要の高い昼間を放電段階Ｐ2とし、電力需
要の低い夜間に充電段階Ｐ4とするように運転のサイク
ルが組まれている。しかし、放電段階Ｐ2は昼間の電力
需要に応じて８時間〜１２時間の間で変動するため、放
電終了後３０分以上の休止段階Ｐ3を取らずに充電段階
Ｐ4に入る場合も生じ得る。Normally, the operation cycle of a module battery using a NAS battery is set such that the daytime when power demand is high is set as the discharge stage P 2 and the night time when power demand is low is set as the charge stage P 4 . However, the discharge phase P 2 is to vary between 8 to 12 hours depending on the daytime power demand occurs even if without taking pause step P 3 for more than 30 minutes after the end of discharge into the charge phase P 4 obtain.
【００３７】 このような場合には、充電開始時ｔ3を
基準として開放電圧値の測定時を決定してもよい。充電
開始時ｔ3から少なくとも検出所要時間を差し引いた時
点において開放電圧値を測定することにより、活物質の
拡散時間を可能な限り長く取ることができるからであ
る。通常の電池運転のサイクルは、電池に不必要なスト
レスを与えないために最低でも１０分間の休止段階Ｐ3
を取るように組まれているため、例えば充電開始時ｔ3
から５分前の時点において開放電圧値を測定すればよ
い。In such a case, the time when the open-circuit voltage value is measured may be determined based on the charging start time t 3 . By measuring the open-circuit voltage value at the time obtained by subtracting at least the detection time required from the charge start time t 3, because it can take as long as possible the diffusion time of the active material. A normal battery operation cycle includes a rest phase P 3 of at least 10 minutes to avoid unnecessary stress on the battery.
For example, at the start of charging t 3
The open-circuit voltage value may be measured at a time point five minutes before.
【００３８】[0038]
【実施例】 以下、本発明の第１〜第３の検出方法につ
いて、モジュール電池を「電池列」、当該モジュール電
池のブロックを「電池単位」として具体化した検出シス
テムの実施例を説明する。但し、本発明のシステムはこ
れらの実施例に限定されるものではない。Hereinafter, an embodiment of a detection system in which module batteries are referred to as “battery strings” and blocks of the module batteries are referred to as “battery units” will be described with respect to the first to third detection methods of the present invention. However, the system of the present invention is not limited to these embodiments.
【００３９】（実施例１） 既述した第１の検出方法に
対応するシステム（以下、第１のシステムという。）
は、例えば図４に示すように、電圧計１０と、判定器１
１と、警報手段１２及び表示手段１３とを備えて構成さ
れる。これらの構成要素は、モジュール電池１自体に設
置してもよいが、別途設けた監視手段１５に設置し、モ
ジュール電池１から通信ケーブル１４により接続する方
法を採ってもよい。(Embodiment 1) A system corresponding to the above-described first detection method (hereinafter, referred to as a first system).
Is, for example, as shown in FIG.
1 and an alarm unit 12 and a display unit 13. These components may be installed in the module battery 1 itself, or may be installed in the separately provided monitoring means 15 and connected to the module battery 1 by the communication cable 14.
【００４０】 電圧計１０は、各ブロック４の電圧値を
測定するための計器であり、具体的には、絶縁アンプが
好適に用いられる。判定器１１は、測定電圧値Ｖ1が設
定範囲Ｖa≦Ｖ1≦Ｖb内にあるか否かを判定するための
計器であり、具体的にはシーケンサ、コンピュータ或い
はアナログ設定器等が好適に用いられる。The voltmeter 10 is a meter for measuring the voltage value of each block 4, and specifically, an insulating amplifier is suitably used. Determiner 11 is a meter for the measurement voltage value V 1 for determining whether or not within the set range Va ≦ V 1 ≦ Vb, specifically sequencer, using suitably a computer or analog set, etc. Can be
【００４１】 警報手段１２及び表示手段１３は、測定
電圧値Ｖ1が設定範囲Ｖa≦Ｖb外である場合に故障を警
告するための伝達手段である。本発明において警報手段
１２とは、故障を聴覚的に伝達する手段を意味し、例え
ば警告ブザー、自動通報装置等が挙げられる。なお、自
動通報装置とは、外部から警報情報が与えられた場合
に、予め設定された複数の電話番号に自動的に順次電話
をかけ、警告内容に応じて予め録音されたメッセージを
繰り返し伝える保安装置をいう。The warning means 12 and the display means 13 are transmission means for warning a failure when the measured voltage value V 1 is out of the setting range Va ≦ Vb. In the present invention, the warning means 12 means a means for transmitting a failure audibly, and examples thereof include a warning buzzer and an automatic notification device. When an alarm is given from outside, the automatic notification device automatically makes a call to a plurality of preset telephone numbers automatically, and repeatedly transmits a pre-recorded message according to the content of the warning. A device.
【００４２】 本発明において表示手段１３とは、故障
を視覚的に伝達する手段を意味し、例えば警告ランプ、
ディスプレイ表示等が挙げられるが、故障発生時刻、故
障電池単位等、複数の情報が一時に表示できる点におい
てディスプレイ表示であることが好ましい。In the present invention, the display means 13 means means for visually transmitting a failure, for example, a warning lamp,
Although display display and the like can be mentioned, display display is preferable in that a plurality of pieces of information such as a failure occurrence time and a unit of a failed battery can be displayed at one time.
【００４３】 第１のシステムにおいては、例えばモジ
ュール電池に設置された電圧計１０により、各ブロック
４の電圧値を測定し、その測定電圧値Ｖ1をデジタル信
号に変換した上で、通信ケーブル１４を経由して監視手
段１５に出力する。監視手段１５に設置された判定器１
１には、ブロックの正常な電圧値が予め設定されてお
り、デジタル信号として入力された各ブロック毎の測定
電圧値Ｖ1が設定範囲Ｖa≦Ｖ1≦Ｖb内にあるか否かを判
定する。In the first system, the voltage value of each block 4 is measured by, for example, a voltmeter 10 installed on a module battery, and the measured voltage value V 1 is converted into a digital signal. And outputs it to the monitoring means 15 via. Judgment device 1 installed in monitoring means 15
1, it is determined whether the normal voltage value of the block is set in advance, the measured voltage value V 1 of the each block is input as a digital signal is within the set range Va ≦ V 1 ≦ Vb .
【００４４】 ブロック内の単電池が故障すると当該ブ
ロックのストリングの並列数にほぼ反比例して電圧値が
低下する。例えば６個の単電池を直列したストリング１
０列を並列に接続したモジュール電池の場合、単電池が
１本故障すると、当該ブロックの放電末の開放電圧値が
約３５０（ｍＶ）、２本故障すると、約７００（ｍＶ）
低下する。When a unit cell in a block fails, the voltage value decreases substantially in inverse proportion to the number of parallel strings in the block. For example, a string 1 in which six cells are connected in series
In the case of a module battery in which 0 rows are connected in parallel, if one cell fails, the open-circuit voltage value at the end of discharge of the block is about 350 (mV), and if two cells fail, about 700 (mV)
descend.
【００４５】 従って、正常電圧値±２５０（ｍＶ）の
範囲を正常値として設定しておけばブロック内の単電池
の故障を検出できることになる。判定器１１により故障
と判断した場合は故障信号が、監視手段１５に設置され
た警告ブザー等の警報手段１２及びディスプレイ等の表
示手段１３に出力され、監視者が故障を確認することが
できる。Therefore, if the range of the normal voltage value ± 250 (mV) is set as the normal value, it is possible to detect the failure of the unit cell in the block. When the failure is determined by the determiner 11, a failure signal is output to the warning means 12 such as a warning buzzer installed in the monitoring means 15 and the display means 13 such as a display, so that the monitor can confirm the failure.
【００４６】（実施例２） 第２の検出方法に対応する
システム（以下、第２のシステムという。）の例として
は、図１に示すように第１のシステムに比較器１６を加
えたシステムが挙げられる。比較器１６は、測定電圧値
Ｖ1、Ｖ2を比較するための計器であって、判定器１１と
同様にシーケンサ、コンピュータ、アナログ設定器等が
好適に用いられる。Embodiment 2 As an example of a system corresponding to the second detection method (hereinafter referred to as a second system), a system in which a comparator 16 is added to the first system as shown in FIG. Is mentioned. The comparator 16 is an instrument for comparing the measured voltage values V 1 and V 2 , and a sequencer, a computer, an analog setting device, or the like is preferably used as in the case of the determiner 11.
【００４７】 第２のシステムでは、第１のシステムと
同様に各ブロック４の電圧値を測定し、監視手段１５に
設置された比較器１６に出力する。比較器１６では例え
ば隣接する２つのブロックの測定電圧値Ｖ1、Ｖ2を比較
して電圧差Ｖxを算出し、同じく監視手段１５に設置さ
れた判定器１１に出力する。In the second system, similarly to the first system, the voltage value of each block 4 is measured and output to the comparator 16 provided in the monitoring means 15. The comparator 16 compares the measured voltage values V 1 and V 2 of two adjacent blocks to calculate a voltage difference Vx, for example, and outputs the voltage difference Vx to the determiner 11 installed in the monitoring means 15.
【００４８】 判定器１１には、ブロック間の正常な電
圧差Ｖcが予め設定されており、デジタル信号として入
力された電圧差Ｖxが設定範囲Ｖx≦Ｖc内にあるか否か
を判定する。The normal voltage difference Vc between the blocks is set in the determiner 11 in advance, and it is determined whether or not the voltage difference Vx input as a digital signal is within the setting range Vx ≦ Vc.
【００４９】 一のブロックの単電池が１本故障すると
他のブロックとの放電末の開放電圧値の電圧差が約３５
０（ｍＶ）、２本故障すると、７００（ｍＶ）となるた
め、正常電圧差を２５０（ｍＶ）以内と設定しておけば
ブロック内の単電池の故障を検出できることになる。故
障信号の出力方法、故障の警告方法については第１のシ
ステムと同様である。When one of the cells in one block fails, the voltage difference between the open circuit voltage values of the other blocks at the end of discharge is about 35.
If 0 (mV) or two failures occur, the voltage becomes 700 (mV). Therefore, if the normal voltage difference is set within 250 (mV), a failure of a unit cell in the block can be detected. The method of outputting a failure signal and the method of warning a failure are the same as in the first system.
【００５０】（実施例３） 第３の検出方法に対応する
システム（以下、第３のシステムという。）の例として
は、図５に示すように、第２のシステムに更に記憶手段
１７を加えたシステムが挙げられる。記憶手段１７は、
測定電圧値Ｖ1’を記憶するための手段であって、監視
手段１５に設置される。記憶手段１７としては、判定器
１１、比較器１６と同様にコンピュータやシーケンサが
好適に用いられる。Embodiment 3 As an example of a system corresponding to the third detection method (hereinafter, referred to as a third system), as shown in FIG. 5, a storage means 17 is added to the second system. System. The storage means 17
This is a means for storing the measured voltage value V 1 ′, and is provided in the monitoring means 15. As the storage means 17, a computer or a sequencer is preferably used as in the case of the determiner 11 and the comparator 16.
【００５１】 第３のシステムでは、第２のシステムと
同様に各ブロック４の電圧値を測定し、監視手段１５に
設置された比較器１６に出力する。比較器１６には測定
電圧値Ｖ1とともに、記憶手段１７から同一ブロックに
おける過去の測定電圧値Ｖ1’が入力されており、両者
を比較して電圧差Ｖyを算出し、判定器１１に出力す
る。In the third system, similarly to the second system, the voltage value of each block 4 is measured and output to the comparator 16 provided in the monitoring means 15. The measured voltage value V 1 and the past measured voltage value V 1 ′ in the same block are input from the storage unit 17 to the comparator 16, and the two are compared to calculate a voltage difference Vy and output the same to the determiner 11. I do.
【００５２】 判定器１１には、同一ブロックにおける
正常な電圧差Ｖdが予め設定されており、電圧差Ｖyが設
定範囲Ｖy≦Ｖd内にあるか否かを判定する。故障の検出
方法、故障信号の出力方法、故障の警告方法については
第２のシステムと同様である。The normal voltage difference Vd in the same block is set in the determiner 11 in advance, and it is determined whether the voltage difference Vy is within a set range Vy ≦ Vd. The method of detecting a failure, the method of outputting a failure signal, and the method of warning a failure are the same as in the second system.
【００５３】（実施例４） 第３のシステムの変形とし
て、図６に示すように、記憶手段１７の代わりに演算手
段１８を加えたシステム（以下、第４のシステムとい
う。）も考えられる。(Embodiment 4) As a modification of the third system, as shown in FIG. 6, a system in which an arithmetic unit 18 is added instead of the storage unit 17 (hereinafter, referred to as a fourth system) can be considered.
【００５４】 演算手段１８は、電池単位毎の測定電圧
値の平均電圧値を算出するための手段であって、監視手
段１５に設置される。演算手段１８としては、判定器１
１、比較器１６、記憶手段１７と同様にコンピュータや
シーケンサが好適に用いられる。The calculating means 18 is means for calculating an average voltage value of the measured voltage value for each battery unit, and is installed in the monitoring means 15. The judging device 1 includes
1, a computer and a sequencer are preferably used as in the case of the comparator 16, the storage means 17, and the like.
【００５５】 第４のシステムでは、第３のシステムと
同様にブロック４の電圧値Ｖ1を測定し、監視手段１５
に設置された演算手段１８に出力する。演算手段１８に
は測定電圧値Ｖ1とともに、他のブロックにおける測定
電圧値Ｖ2〜Ｖnも入力され、これらの平均電圧値Ｖave
を算出し、比較器１６に出力する。In the fourth system, similarly to the third system, the voltage value V 1 of the block 4 is measured, and the monitoring means 15
Is output to the calculation means 18 installed in the. Together with the measurement voltage value V 1 was the arithmetic means 18, the measured voltage value V 2 to Vn in the other blocks are also input, these average voltage value Vave
Is calculated and output to the comparator 16.
【００５６】 比較器１６では測定電圧値Ｖ1と平均電
圧値Ｖaveを比較して電圧差Ｖzを算出し、同じく監視手
段１５に設置された判定器１１に出力する。判定器１１
には、正常な電圧差Ｖeが予め設定されており、電圧差
Ｖzが設定範囲Ｖz≦Ｖe内にあるか否かを判定する。故
障の検出方法、故障信号の出力方法、故障の警告方法に
ついては第３のシステムと同様である。The comparator 16 compares the measured voltage value V 1 with the average voltage value Vave to calculate a voltage difference Vz, and outputs the voltage difference Vz to the determiner 11 similarly installed in the monitoring means 15. Judge 11
, A normal voltage difference Ve is set in advance, and it is determined whether or not the voltage difference Vz is within a setting range Vz ≦ Ve. The method of detecting a failure, the method of outputting a failure signal, and the method of warning a failure are the same as in the third system.
【００５７】 なお、実施例１〜４のシステムにおいて
は、説明の便宜上、判定器１１、比較器１６、記憶手段
１７、演算手段１８等を別個独立に表現してあるが、こ
れらの装置・手段の機能を、単一の装置（例えばコンピ
ュータ）に付与することを何ら妨げるものではない。In the systems of the first to fourth embodiments, for convenience of explanation, the determiner 11, the comparator 16, the storage unit 17, the arithmetic unit 18 and the like are separately and independently expressed. Does not hinder the provision of the above function to a single device (for example, a computer).
【００５８】[0058]
【発明の効果】 以上に説明した通り、本発明の単電池
故障検出方法及びシステムは、測定電圧値から放電深度
を算出することなく故障を検出することができるため、
検出方法が単純で、安価な検出システムを提供すること
が可能である。また、多数の単電池が複合的に接続され
てなる大規模なバッテリーシステムにおいても、故障が
存する電池単位を特定でき、当該電池単位のみを修理・
調整等行えば済むようになる。As described above, the cell failure detection method and system of the present invention can detect a failure without calculating the depth of discharge from the measured voltage value.
It is possible to provide an inexpensive detection system with a simple detection method. Further, even in a large-scale battery system in which a large number of cells are connected in a complex manner, it is possible to specify a battery unit having a failure, and to repair / repair only the battery unit.
Adjustment and the like will be sufficient.
【図１】 本発明の単電池故障検出システムの一の実施
例を示す模式図である。FIG. 1 is a schematic diagram showing one embodiment of a unit cell failure detection system of the present invention.
【図２】 一般的なモジュール電池の構造を示す模式図
である。FIG. 2 is a schematic view showing the structure of a general module battery.
【図３】 モジュール電池の運転サイクルを示すグラフ
であって、（ａ）は電圧値、（ｂ）は電力値、（ｃ）は
信号を示すグラフである。3A and 3B are graphs showing operation cycles of the module battery, wherein FIG. 3A is a graph showing a voltage value, FIG. 3B is a graph showing a power value, and FIG. 3C is a graph showing a signal.
【図４】 本発明の単電池故障検出システムの別の実施
例を示す模式図である。FIG. 4 is a schematic diagram showing another embodiment of the unit cell failure detection system of the present invention.
【図５】 本発明の単電池故障検出システムの更に別の
実施例を示す模式図である。FIG. 5 is a schematic diagram showing still another embodiment of the unit cell failure detection system of the present invention.
【図６】 本発明の単電池故障検出システムの更にまた
別の実施例を示す模式図である。FIG. 6 is a schematic diagram showing still another embodiment of the single cell failure detection system of the present invention.
１…モジュール電池、２…ＮＡＳ単電池、３…ストリン
グ、４…ブロック、５…断熱容器、１０…電圧計、１１
…判定器、１２…警報手段、１３…表示手段、１４…通
信ケーブル、１５…監視手段、１６…比較器、１７…記
憶手段、１８…演算手段。DESCRIPTION OF SYMBOLS 1 ... Module battery, 2 ... NAS unit cell, 3 ... String, 4 ... Block, 5 ... Insulated container, 10 ... Voltmeter, 11
... Judgment device, 12 alarm means, 13 display means, 14 communication cable, 15 monitoring means, 16 comparator, 17 storage means, 18 arithmetic means.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿部 浩幸 愛知県名古屋市瑞穂区須田町２番56号 日 本碍子株式会社内 Ｆターム(参考） 2G016 CA00 CB05 CB11 CC01 CC04 CC06 CC27 CD01 CD02 CD03 CE00 CE07 CE31 5H029 AJ12 AK05 AL13 AM15 DJ02 5H030 AA06 AA10 AS05 FF44 FF52 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Abe 2-56, Suda-cho, Mizuho-ku, Nagoya-shi, Aichi F-term in Nihon Insulators Co., Ltd. (Reference) 2G016 CA00 CB05 CB11 CC01 CC04 CC06 CC27 CD01 CD02 CD03 CE00 CE07 CE31 5H029 AJ12 AK05 AL13 AM15 DJ02 5H030 AA06 AA10 AS05 FF44 FF52
Claims (17)
してなる電池列において、電池単位毎に電池の故障を検
出する方法であって、 各電池単位の電圧値を測定し、 当該測定電圧値、当該測定電圧値の各電池単位間での電
圧差、或いは当該測定電圧値と設定電圧値との電圧差
が、設定範囲内にあるか否かを判定することにより、故
障を検出することを特徴とする電池故障検出方法。1. A method for detecting a failure of a battery for each battery unit in a battery array comprising at least two battery units connected in series, comprising: measuring a voltage value of each battery unit; By detecting whether the voltage difference between each battery unit of the measured voltage value or the voltage difference between the measured voltage value and the set voltage value is within a set range, the failure can be detected. Characteristic battery failure detection method.
電池を直列に接続してなるストリングを、更に並列に接
続してなるブロックであって、電池列が、当該ブロック
を、少なくとも２以上直列に接続し断熱容器に収容して
なるモジュール電池である請求項１に記載の電池故障検
出方法。2. The battery unit is a block in which a string formed by connecting a plurality of sodium-sulfur cells in series is further connected in parallel, and the battery row includes at least two or more blocks connected in series. The battery failure detection method according to claim 1, wherein the battery is a module battery connected to a battery and housed in a heat insulating container.
ル電池であって、電池列が当該モジュール電池を少なく
とも２以上直列に接続してなるモジュール電池列である
請求項１に記載の電池故障検出方法。3. The battery failure according to claim 1, wherein the battery unit is the module battery according to claim 2, wherein the battery row is a module battery row formed by connecting at least two or more module batteries in series. Detection method.
を故障として検出する請求項１〜３のいずれか一項に記
載の電池故障検出方法。4. A voltage value of each battery unit is measured, and it is determined whether or not the measured voltage value is within a set range. If the measured voltage value is out of the set range, the battery unit is regarded as a failure. The battery failure detection method according to claim 1, wherein the battery failure is detected.
し、 当該電圧差が設定範囲内であるか否かを判定し、 当該電圧差が設定範囲外である場合に、当該比較した電
池単位のうち測定電圧値が低い電池単位を故障として検
出する請求項１〜３のいずれか一項に記載の電池故障検
出方法。5. A voltage value of each battery unit is measured, a voltage difference is calculated by comparing the measured voltage value between each battery unit, and it is determined whether the voltage difference is within a set range. The battery failure detection method according to any one of claims 1 to 3, wherein when the voltage difference is out of the set range, a battery unit having a lower measured voltage value among the compared battery units is detected as a failure.
に、２の電池単位を１組として測定電圧値を比較する請
求項５に記載の電池故障検出方法。6. The battery failure detecting method according to claim 5, wherein when comparing the measured voltage values between the respective battery units, the measured voltage values are compared with each other as a set of two battery units.
算出し、 当該電圧差が設定範囲内であるか否かを判定し、 当該電圧差が設定範囲外である場合に当該電池単位を故
障として検出する請求項１〜３のいずれか一項に記載の
電池故障検出方法。7. A voltage value is measured for each battery unit, a voltage difference is calculated by comparing the measured voltage value with a set voltage value, and it is determined whether the voltage difference is within a set range. The battery failure detection method according to any one of claims 1 to 3, wherein the battery unit is detected as a failure when the voltage difference is out of the set range.
去の測定電圧値である請求項７に記載の電池故障検出方
法。8. The battery failure detection method according to claim 7, wherein the set voltage value is a past measured voltage value in the same battery unit.
の平均電圧値である請求項７に記載の電池故障検出方
法。9. The battery failure detection method according to claim 7, wherein the set voltage value is an average voltage value for all battery units.
電池単位以外の全ての電池単位についての平均電圧値で
ある請求項７に記載の電池故障検出方法。10. The battery failure detection method according to claim 7, wherein the set voltage value is an average voltage value for all battery units other than the battery unit having the lowest measured voltage value.
である、請求項１〜１０のいずれか一項に記載の電池故
障検出方法。11. The battery failure detection method according to claim 1, wherein the voltage value to be measured is an open-circuit voltage value at the end of discharge.
内であって、かつ、開放電圧値が安定化した後に開放電
圧値を測定する、請求項１１に記載の電池故障検出方
法。12. The battery failure detection method according to claim 11, wherein the open-circuit voltage value is measured during a pause period from the end of discharging to the start of charging and after the open-circuit voltage value is stabilized.
後３０分乃至２時間において開放電圧値を測定する、請
求項１１に記載の電池故障検出方法。13. The battery failure detection method according to claim 11, wherein the open circuit voltage value is measured 30 minutes to 2 hours after the end of the discharge with reference to the end of the discharge.
測定時を決定する、請求項１１に記載の電池故障検出方
法。14. The battery failure detection method according to claim 11, wherein the time when the open circuit voltage value is measured is determined based on the time when charging is started.
続してなる電池列において、電池単位毎に電池の故障を
検出するシステムであって、 各電池単位の電圧値を測定するための電圧計と、 当該測定電圧値が設定範囲内であるか否かを判定するた
めの判定器と、 当該測定電圧値が設定範囲外である場合に、当該電池単
位の故障を警告するための警報手段及び／又は当該電池
単位の故障を表示するための表示手段を備えたことを特
徴とする電池故障検出システム。15. A system for detecting a failure of a battery in each battery unit in a battery array having at least two battery units connected in series, comprising: a voltmeter for measuring a voltage value of each battery unit. A determiner for determining whether or not the measured voltage value is within a set range; and alarm means for warning a failure of the battery unit when the measured voltage value is out of the set range; Alternatively, a battery failure detection system comprising display means for displaying the failure of each battery unit.
いは電池単位毎の測定電圧値と設定電圧値との電圧差を
算出するための比較器を備え、 判定器を、当該電圧差が設定範囲内であるか否かを判定
するためのものとした請求項１５に記載の電池故障検出
システム。16. A comparator for calculating a voltage difference between a measured voltage value for each battery unit or a voltage difference between a measured voltage value for each battery unit and a set voltage value. 16. The battery failure detection system according to claim 15, wherein the system is configured to determine whether the battery is within a set range.
するための記憶手段及び／又は電池単位毎の測定電圧値
の平均電圧値を算出するための演算手段を備えた請求項
１６に記載の電池故障検出システム。17. The storage device according to claim 16, further comprising storage means for storing a past measured voltage value of each battery unit and / or calculating means for calculating an average voltage value of the measured voltage values for each battery unit. Battery failure detection system.
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|---|---|---|---|
| JP10288414A JP2000123883A (en) | 1998-10-09 | 1998-10-09 | Battery failure detecting method and battery failure detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10288414A JP2000123883A (en) | 1998-10-09 | 1998-10-09 | Battery failure detecting method and battery failure detecting system |
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|---|---|---|---|
| JP2004129889A Division JP2004247319A (en) | 2004-04-26 | 2004-04-26 | Battery fault detecting method |
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| JP2000123883A true JP2000123883A (en) | 2000-04-28 |
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| KR102439932B1 (en) | 2017-07-26 | 2022-09-05 | 삼성전자주식회사 | Method and apparatus for detecting battery fault |
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