JP2003284255A - Method of charging secondary battery and its device - Google Patents

Method of charging secondary battery and its device

Info

Publication number
JP2003284255A
JP2003284255A JP2002082809A JP2002082809A JP2003284255A JP 2003284255 A JP2003284255 A JP 2003284255A JP 2002082809 A JP2002082809 A JP 2002082809A JP 2002082809 A JP2002082809 A JP 2002082809A JP 2003284255 A JP2003284255 A JP 2003284255A
Authority
JP
Japan
Prior art keywords
voltage
charging
battery
secondary battery
switch
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.)
Granted
Application number
JP2002082809A
Other languages
Japanese (ja)
Other versions
JP3875129B2 (en
Inventor
Yoshiyuki Arai
井 善 行 新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanoh Industrial Co Ltd
Original Assignee
Sanoh Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanoh Industrial Co Ltd filed Critical Sanoh Industrial Co Ltd
Priority to JP2002082809A priority Critical patent/JP3875129B2/en
Publication of JP2003284255A publication Critical patent/JP2003284255A/en
Application granted granted Critical
Publication of JP3875129B2 publication Critical patent/JP3875129B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Secondary Cells (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of charging secondary battery in which excessive charging is prevented and battery pressure is controlled to lower level, thereby enhancing safety, and charging capacity is increased to moderate level, thereby increasing battery lifetime and its device. <P>SOLUTION: A method of charging a secondary battery in which variations in voltages of batteries per unit time during charging are computed, and a charging operation is stopped when a drop of 0.0005 to 0.0015 V/10 s takes place from the maximum value of variations of the voltages. And a charging device of the secondary battery which comprises a switch, a voltage measuring apparatus for measuring battery voltages, and a controller for computing variations of measured voltages, and for sending power off signals to the switch when a drop of 0.0005 to 0.0015 V/10 s takes place, from the maximum value of the voltage variations. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、二次電池の過充電
を防止し、電池容器内の圧力を低く抑えて安全性を高
め、充電容量を適度に高めて、電池寿命を長くして二次
電池を長期間安全に使用することができる二次電池の充
電方法及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents overcharge of a secondary battery, suppresses the pressure in the battery container to improve safety, and appropriately increases the charging capacity to prolong the battery life. The present invention relates to a secondary battery charging method and device that can safely use a secondary battery for a long period of time.

【０００２】[0002]

【従来の技術】従来、二次電池に充電を行うと、一般に
充電容量の１００％を超過する付近で電池の電圧が急激
に上昇することから、充電が終了したことが判定できる
ので、通常、定電圧法によって充電が行われている。し
かし、定電圧法による充電は、一定した電圧の電流を一
定した時間通電することによって充電を行うことから、
該方法は充電率が上昇するのに伴って、発熱したり、図
５に示す様な圧力変化が生じる。特に、充電率１００％
付近から急激な圧力の上昇が起こる。従って、密閉型セ
ルを用いた二次電池の中には、過充電になると熱暴走を
起こしたり、内部圧力の急激な上昇による爆発や液漏れ
等の危険が生じるので、必ずしも定電圧法による充電が
向いていない二次電池もある。2. Description of the Related Art Conventionally, when a secondary battery is charged, the voltage of the battery generally sharply rises in the vicinity of 100% of the charging capacity, so that it can be determined that the charging is completed. Charging is performed by the constant voltage method. However, in the charging by the constant voltage method, the charging is performed by supplying a constant voltage current for a fixed time.
In this method, as the charging rate increases, heat is generated and a pressure change as shown in FIG. 5 occurs. Especially, the charging rate is 100%
A sudden pressure increase occurs from the vicinity. Therefore, some rechargeable batteries that use sealed cells may cause thermal runaway when overcharged, or may explode or leak due to a sudden increase in internal pressure. Some rechargeable batteries are not suitable.

【０００３】また、二次電池は充放電を繰り返し行って
いると、使用の初期においては漸次充放電容量が増加し
て、最高値を示すようになるが、その後、次第に充放電
容量が減少して、再び充放電容量が増加することがなく
なるとの現象が起こる。この様な充放電容量の増減は、
電極板の種類、電極板の製造条件等によっても異なる
が、一般には、電極板の厚みが薄く、正極ペーストが軟
らかく、充電電流が強く、休止時間が長く、使用温度が
高く、完全放電に近い取り扱いを行うほど速くなる傾向
があることから、一定した充放電容量となり難い。更
に、二次電池の充放電を繰り返し行っていると、二次電
池における電圧の変化にメモリ効果が生じることから、
サイクル回数が増すにつれて徐々に電圧が高くなってく
るために、一定した充電時間で充電すると、充電容量の
不足によって所定の電圧が得られなかったり、過充電に
なることによって著しく電池の寿命を短縮させたりもし
た。Further, when the secondary battery is repeatedly charged and discharged, the charge and discharge capacity gradually increases at the initial stage of use to reach the maximum value, but thereafter the charge and discharge capacity gradually decreases. As a result, the phenomenon that the charge / discharge capacity does not increase again occurs. Such increase and decrease in charge and discharge capacity is
Although it depends on the type of electrode plate, the manufacturing conditions of the electrode plate, etc., in general, the thickness of the electrode plate is thin, the positive electrode paste is soft, the charging current is strong, the down time is long, the operating temperature is high, and it is close to complete discharge. It tends to be faster as it is handled, so it is difficult to obtain a constant charge / discharge capacity. Furthermore, if the secondary battery is repeatedly charged and discharged, a memory effect occurs in the change in the voltage of the secondary battery.
Since the voltage gradually increases as the number of cycles increases, if the battery is charged for a fixed charging time, the specified voltage cannot be obtained due to insufficient charging capacity, or overcharging significantly shortens the battery life. I did it.

【０００４】[0004]

【発明が解決しようとする課題】一般的に、開放型ニッ
ケル・カドミウム電池においては、最も良い充電挙動を
示すことから、幅広い温度範囲で充電を行うことが可能
で、どのような方法でも短時間で充電することができ、
ある程度の過充電が行われても電池に損傷を被らせるこ
とはなかった。しかし、密閉型ニッケル・カドミウム電
池、密閉型ニッケル・金属水素化物電池、及び、ニッケ
ル・鉄電池は、良好な充電挙動を示すことができるが、
使用温度範囲が狭いことから、過充電による加熱を阻止
する必要がある。特に、密閉型ニッケル・金属水素化物
電池は、過充電に対して敏感で、加熱し過ぎないように
充電を制御しなければならない。更に、鉛蓄電池も充電
特性は良好であるが、過充電に対しては非常に注意を必
要とする。また、亜鉛・二酸化マンガン電池や亜鉛・酸
化銀電池は過充電に対しては注意を必要とし、この様な
過充電は電池の寿命を顕著に短縮してしまう。従って、
過充電を防止するために、低ノイズ型高性能電圧計等を
用いて正確な電池の電圧を計測して、その最大電圧値で
充電を停止する充電器も知られているが、この様な充電
器は高価であったり、何度も充電を行っていると上記メ
モリ効果が生じることから、充電容量の大幅な不足が発
生し易いとの問題があった。Generally, open-type nickel-cadmium batteries exhibit the best charging behavior, so that they can be charged in a wide temperature range, and any method can be used for a short time. Can be charged with
The battery was not damaged even if it was overcharged to some extent. However, the sealed nickel-cadmium battery, the sealed nickel-metal hydride battery, and the nickel-iron battery can show good charging behavior,
Since the operating temperature range is narrow, it is necessary to prevent heating due to overcharge. In particular, sealed nickel metal hydride batteries are sensitive to overcharging and must be controlled to prevent overheating. Further, lead-acid batteries also have good charging characteristics, but they require great care in overcharging. In addition, zinc / manganese dioxide batteries and zinc / silver oxide batteries require careful attention to overcharging, and such overcharging significantly shortens the battery life. Therefore,
In order to prevent overcharging, there is also known a charger that accurately measures the battery voltage using a low-noise high-performance voltmeter and stops charging at the maximum voltage value. There is a problem in that the charger is expensive and the memory effect described above occurs when the battery is charged many times, so that a large shortage of charge capacity is likely to occur.

【０００５】一方、多くの電池メーカーにおいては、２
〜３時間以内に充電することができる急速充電型の電池
が市販されている。しかし、この様な急速充電型の電池
は、過充電によるガスの発生により、圧力や温度の上昇
が起こる前に充電を休止する必要がある。この様な過充
電時の上記挙動があることによって、電池の外装用密閉
容器が開封されて液漏れが発生したり、電池が使用不能
になったりした。On the other hand, in many battery manufacturers, 2
Fast charging batteries are commercially available that can be charged within ~ 3 hours. However, in such a rapid charge type battery, it is necessary to suspend charging before pressure or temperature rise due to generation of gas due to overcharge. Due to the above-described behavior during overcharging, the sealed container for exterior of the battery was opened and liquid leakage occurred, or the battery became unusable.

【０００６】[0006]

【課題を解決するための手段】本発明者は、上記問題点
に鑑みて鋭意研究を重ねた結果、電池容器内の圧力を低
く抑えて安全性を高め、充電容量を適度に高めて、過充
電が生じないようにすれば電池の寿命は増加するので、
過充電を防止するために、本発明では充電時の電池の単
位時間当たりの電圧変化量（ｄｖ／ｄｔ）に着目して、
更に、測定された電圧のノイズにより誤作動が生じない
ようにするために、単位時間当たりの電圧の変化量（ｄ
ｖ／ｄｔ）を算出して、その単位時間当たりの電圧の変
化量（ｄｖ／ｄｔ）が最大に達した時点の値より０．０
００５〜０．００１５Ｖ／１０秒の電圧の変化量（ｄｖ
／ｄｔ）の低下が生じた時に電源との接続を中止して充
電を停止すれば、過充電を防止し、電池寿命を長くして
二次電池を長期間安全に使用することができるとの知見
に基づき本発明を完成するに至ったものである。Means for Solving the Problems As a result of intensive studies in view of the above problems, the present inventor suppressed the pressure in the battery container to a low level to improve safety and to appropriately increase the charging capacity, If you do not charge the battery, it will increase the battery life.
In order to prevent overcharge, the present invention focuses on the voltage change amount (dv / dt) of the battery during charging,
Further, in order to prevent malfunction due to noise in the measured voltage, the amount of change in voltage (d) per unit time (d
v / dt) is calculated to be 0.0 from the value at the time when the amount of change (dv / dt) of the voltage per unit time reaches the maximum.
Voltage change amount (dv of 005 to 0.0015 V / 10 seconds)
/ Dt), if the connection with the power supply is stopped and the charging is stopped when the decrease of / dt) occurs, overcharging can be prevented, the battery life can be extended, and the secondary battery can be used safely for a long period of time. The present invention has been completed based on the findings.

【０００７】すなわち、本発明の二次電池の充電方法
は、二次電池を電源と接続することにより充電を行う二
次電池の充電方法において、前記二次電池の電圧を測定
し、その単位時間当たりの電圧変化量（ｄｖ／ｄｔ）を
算出して、その電圧変化量が徐々に増加し、その電圧変
化量が最大値に達した時点より０．０００５〜０．００
１５Ｖ／１０秒の電圧の低下が生じた時に二次電池と電
源との接続を中止して充電を停止すること、を特徴とす
るものである。また、本発明のもう一つの発明である二
次電池の充電装置は、電源と接続して電源との接続／切
断を行うための開閉器と、充電を行う二次電池の電圧を
測定するための電圧測定器と、該電圧測定器により測定
された電圧の単位時間当たりの電圧変化量（ｄｖ／ｄ
ｔ）を算出して、その電圧変化量が徐々に増加し、その
電圧変化量が最大値に達した時点より０．０００５〜
０．００１５Ｖ／１０秒の電圧の低下が生じた時に、前
記開閉器に二次電池と電源との接続を中止する信号を送
るための制御器とから構成されていること、を特徴とす
るものである。That is, the secondary battery charging method of the present invention is the secondary battery charging method in which the secondary battery is charged by connecting the secondary battery to a power source. The amount of change in voltage (dv / dt) is calculated, the amount of change in voltage gradually increases, and 0.0005 to 0.00 from the time when the amount of change in voltage reaches the maximum value.
When a voltage drop of 15V / 10 seconds occurs, the connection between the secondary battery and the power supply is stopped to stop the charging. A secondary battery charging device according to another aspect of the present invention is a switch for connecting to and disconnecting from a power source, and for measuring the voltage of the secondary battery to be charged. Voltage measuring device and the voltage change amount (dv / d) per unit time of the voltage measured by the voltage measuring device.
t) is calculated, the amount of voltage change gradually increases, and 0.0005 to 0.005 from the time when the amount of voltage change reaches the maximum value.
When a voltage drop of 0.0015 V / 10 seconds occurs, the switch is composed of a controller for sending a signal to stop the connection between the secondary battery and the power source. Is.

【０００８】[0008]

【発明の実施の形態】[I] 二次電池の充電装置 (1) 二次電池 本発明の二次電池の充電装置を用いて充電される二次電
池としては、鉛蓄電池、密閉型鉛蓄電池、ニッケル・カ
ドミウム電池、密閉型ニッケル・カドミウム電池、ニッ
ケル・亜鉛電池、ニッケル・鉄電池、酸化銀蓄電池、ニ
ッケル・水素電池、密閉型ニッケル・金属水素化物電
池、リチウム二次電池、リチウム・硫化鉄電池、亜鉛・
酸化銀電池等の二次電池を挙げることができる。これら
二次電池の中でも、ニッケル・カドミウム電池、密閉型
ニッケル・カドミウム電池、ニッケル・水素電池、密閉
型ニッケル・金属水素化物電池、ニッケル・鉄電池に使
用することが好ましく、特に密閉型ニッケル・金属水素
化物電池に使用することが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION [I] Secondary Battery Charging Device (1) Secondary Battery As a secondary battery to be charged using the secondary battery charging device of the present invention, a lead acid battery or a sealed lead acid battery is used. , Nickel-cadmium battery, sealed nickel-cadmium battery, nickel-zinc battery, nickel-iron battery, silver oxide battery, nickel-hydrogen battery, sealed nickel- metal hydride battery, lithium secondary battery, lithium-iron sulfide Battery, zinc
Secondary batteries, such as a silver oxide battery, can be mentioned. Among these secondary batteries, nickel-cadmium batteries, sealed nickel-cadmium batteries, nickel-hydrogen batteries, sealed nickel-metal hydride batteries, it is preferable to use a nickel-iron batteries, particularly sealed nickel-metal It is preferably used for hydride batteries.

【０００９】(2) 構 造 本発明の二次電池の充電装置１は、図１に示すように、
二次電池２に充電するための電源３と接続して、電源３
との接続／切断を行うための開閉器４と、充電を行う二
次電池２の電圧を測定するための電圧測定器５と、該電
圧測定器５により測定された電圧の単位時間当たりの電
圧の変化量（ｄｖ／ｄｔ）を算出して、その電圧変化量
が徐々に増加し、その電圧の変化量（ｄｖ／ｄｔ）が最
大値に達した時点より０．０００５〜０．００１５Ｖ／
１０秒の低下が生じた時に、前記開閉器４に電源３との
接続を中止するための信号を送るための制御器６とから
基本的に構成されているものである。また、これら開閉
器４、電圧測定器５、表示器５ａ、及び、制御器６が一
体化された、図２に示す如き、一体型の電池の充電装置
７とすることもできる。(2) Structure As shown in FIG. 1, the secondary battery charging device 1 of the present invention is
Connect to the power source 3 for charging the secondary battery 2,
A switch 4 for connecting / disconnecting with, a voltage measuring device 5 for measuring the voltage of the secondary battery 2 to be charged, and a voltage measured by the voltage measuring device 5 per unit time. Change amount (dv / dt) is calculated, the voltage change amount gradually increases, and 0.0005 to 0.0015V / V is reached from the time when the voltage change amount (dv / dt) reaches the maximum value.
It basically comprises a controller 6 for sending a signal to the switch 4 for stopping the connection with the power source 3 when a decrease of 10 seconds occurs. Further, an integrated battery charging device 7 as shown in FIG. 2 in which the switch 4, the voltage measuring device 5, the display device 5a, and the controller 6 are integrated may be used.

【００１０】(3) 構成機器 (A) 電 源 本発明の二次電池の充電装置１が接続される電源３とし
ては、二次電池２に充電を行うためのプラス、マイナス
の二相電源であることから、一般に１００〜２４０Ｖの
ものが使用される。(3) Constituent equipment (A) Power source The power source 3 to which the secondary battery charging device 1 of the present invention is connected is a positive or negative two-phase power source for charging the secondary battery 2. For this reason, a voltage of 100 to 240 V is generally used.

【００１１】(B) 開閉器 本発明の二次電池の充電装置１を構成する開閉器４とし
ては、上記電源３との接続／切断を行うための開閉器４
であることから、ナイフスイッチ、水銀スイッチ、接触
器、遮断器、電界効果トランジスタ（ＦＥＴ）等を使用
することができる。(B) Switch As the switch 4 constituting the rechargeable battery charging device 1 of the present invention, the switch 4 for connecting / disconnecting with the power source 3 is used.
Therefore, a knife switch, a mercury switch, a contactor, a circuit breaker, a field effect transistor (FET) or the like can be used.

【００１２】(C) 電圧測定器 本発明の二次電池の充電装置１を構成する電圧測定器５
としては、充電する電池２の電圧を測定するための測定
器であることから、可動コイル型、可動鉄片型、電流力
計型、熱型、静電型等の電圧計を使用することができ
る。該電圧測定器５には、二次電池２に充電されたその
時点での電気量を表示するため、デジタル型或いはアナ
ログ型の表示器５ａが設けられていることが好ましい。(C) Voltage measuring device Voltage measuring device 5 which constitutes the rechargeable battery charging device 1 of the present invention
Since it is a measuring device for measuring the voltage of the battery 2 to be charged, a voltmeter of a movable coil type, a movable iron piece type, an ammeter type, a thermal type, an electrostatic type or the like can be used. . The voltage measuring device 5 is preferably provided with a digital or analog type display device 5a for displaying the amount of electricity at the time when the secondary battery 2 is charged.

【００１３】(D) 制御器 本発明の電池の充電装置１を構成する制御器６として
は、上記電圧測定器５により測定された二次電池２の電
圧の単位時間当たりの電圧の変化量（ｄｖ／ｄｔ）を算
出して、その電圧変化量（ｄｖ／ｄｔ）が最大に達した
時点の値より０．０００５〜０．００１５Ｖ／１０秒、
好ましくは０．０００５〜０．００１０Ｖ／１０秒、特
に好ましくは０．０００６〜０．０００８Ｖ／１０秒の
電圧変化量（ｄｖ／ｄｔ）の低下が生じた時に、前記開
閉器４に電源３との接続を中止する切断信号を送るため
の制御器６であることから、パーソナルコンピューター
等の小型計算機や、専用ＩＣ等が使用される。電圧の変
化量（ｄｖ／ｄｔ）が最大に達した時点の電圧変化量の
値は、図４に示す通り、電圧変化量の振れが０．０００
１〜０．０００４Ｖ／１０秒程度存在することから、電
圧変化量（ｄｖ／ｄｔ）が最大に達し、０．０００５Ｖ
／１０秒未満のの電圧変化量（ｄｖ／ｄｔ）の低下が生
じても、電圧変化量の振れの範囲内であるかも知れない
ことから、上記電圧変化量が最大値に達した時点である
のか、或いは、一時的に最大値を示しただけで、再び電
圧変化量の値が上昇して再度最大値を示すものであるの
か等について判断しかねるので、上記電圧変化量が最大
値に達した時点であると判断され、且つ、上記範囲内の
電圧変化量の低下が生じたかを判断して制御する必要が
ある。しかしながら、上記０．００１５Ｖ／１０秒を超
過する電圧変化量の低下が生じた時点で開閉器４に電源
３との接続を中止する切断信号を送ったのでは、既に遅
く、電池内の圧力上昇が始まったり、過充電による電池
寿命の低下等を起こしたりする。(D) Controller As the controller 6 constituting the battery charger 1 of the present invention, the amount of change in the voltage of the secondary battery 2 measured by the voltage measuring device 5 per unit time ( dv / dt) is calculated, and 0.0005 to 0.0015 V / 10 seconds from the value when the voltage change amount (dv / dt) reaches the maximum,
When the voltage change amount (dv / dt) is lowered by preferably 0.0005 to 0.0010 V / 10 seconds, particularly preferably 0.0006 to 0.0008 V / 10 seconds, the switch 4 is connected to the power source 3 and Since it is the controller 6 for sending the disconnection signal for stopping the connection, a small computer such as a personal computer or a dedicated IC is used. As shown in FIG. 4, the value of the voltage change amount at the time when the voltage change amount (dv / dt) reaches the maximum value is 0.000 as shown in FIG.
Since it exists for about 1 to 0.0004V / 10 seconds, the maximum voltage change amount (dv / dt) reaches 0.0005V.
Even if the voltage change amount (dv / dt) drops for less than / 10 seconds, it may still be within the range of the voltage change amount swing, and thus it is the time when the voltage change amount reaches the maximum value. However, it is impossible to judge whether the value of the voltage change amount rises again and shows the maximum value again only by temporarily showing the maximum value, so the above voltage change amount reaches the maximum value. It is necessary to control by judging that it is the time when it is determined that the voltage change amount falls within the above range. However, if a disconnection signal for stopping the connection with the power source 3 is sent to the switch 4 at the time when the voltage change amount exceeds 0.0015V / 10 seconds, it is already late and the pressure in the battery rises. May start or the battery life may be shortened due to overcharging.

【００１４】制 御 上記制御範囲内であるかの判定や、制御の具体的な方法
としては、図３に示すフローチャート図による方法によ
って制御される。[0014] system of determination and is within the control the control range, as a specific method of control is controlled by the method according to the flow chart shown in FIG.

【００１５】すなわち、先ず、《１》の［充電開始信号
出力］において、充電開始信号を充電用電源装置にパラ
レルポートを通して送信する。これにより、電源装置よ
り電池に電源が供給されて充電が開始される。That is, first, in [1] [charge start signal output], a charge start signal is transmitted to the charging power supply device through the parallel port. As a result, the power supply device supplies power to the battery to start charging.

【００１６】《２》の［ｎ←０、ｄｖＭａｘ←０、ｆ←
０］において、パソコン内で処理を行うための初期設定
を行う。各パラメータの内容は以下の通りとした。 ｎ：ｄｔ＝１０秒とするためのカウントを保持する。初
期値は０である。 ｄｖＭａｘ：ｄｖ／ｄｔの最大値を保持する。初期値は
０である。 ｆ：初回の電圧移動平均を代入させる為のフラグ。初期
値は０である。[2] [n ← 0, dvMax ← 0, f ←
0], initial setting for processing in the personal computer is performed. The contents of each parameter are as follows. Hold the count for n: dt = 10 seconds. The initial value is 0. dvMax: Holds the maximum value of dv / dt. The initial value is 0. f: Flag for substituting the initial voltage moving average. The initial value is 0.

【００１７】《３》の［電池電圧＞６．９５Ｖ］におい
ては、電圧測定値よりＲＳ−２３２を経由して１秒間隔
でパソコンにデータ転送してくる電池電圧が６．９５Ｖ
より大であるかどうかを判定する。そして、６．９５Ｖ
より大になるまで《３》の［電池電圧＞６．９５Ｖ］を
ループして電池に充電を行う。電池電圧が６．９５Ｖよ
り大になった時点で《４》の［ｎ＝ｎ＋１］で、ｎのカ
ウントを行う。そして、その後《５》でｎ＝１０になっ
たかどうかの判定を行っている。ｎ＝１０と言うのは電
圧測定器からのデータが１秒間隔でパーソナルコンピュ
ーターに取り込まれているためにｎ＝１０→１０秒とい
うことになる。In [3] [battery voltage> 6.95V], the battery voltage at which data is transferred from the measured voltage value to the personal computer via RS-232 at 1 second intervals is 6.95V.
Determine if greater. And 6.95V
The battery is charged by looping the [battery voltage> 6.95V] of << 3 >> until it becomes larger. When the battery voltage becomes higher than 6.95 V, n is counted at [n = n + 1] of << 4 >>. Then, after that, it is determined whether or not n = 10 in << 5 >>. The term n = 10 means that n = 10 → 10 seconds because the data from the voltage measuring device is loaded into the personal computer at intervals of 1 second.

【００１８】《５》の［ｎ＝１０］では、電圧データを
取り込みたいためｎ＝１０となるまで《３》及び《４》
をループし、ｎ＝１０（１０秒）となった時点で次の処
理に移行する。《６》の［ｎ←０］では、ｎのカウント
を０に戻す。In [n = 10] of << 5 >>, since it is desired to take in voltage data, << 3 >> and << 4 >> until n = 10.
Loop, and when n = 10 (10 seconds), the process moves to the next step. In [n ← 0] of << 6 >>, the count of n is returned to 0.

【００１９】《７》の［ｆ＝０］では、初回の電圧のみ
Ｖ１に代入するための判定を行っている。《８》の［Ｖ
１←電池電圧］では、初回のみＶ１に電池電圧を取り込
む。《９》の［ｆ＝１］では、初回の電圧取り込みを以
後行わないのでｆを１とする。In [f = 0] of << 7 >>, the determination for substituting only the initial voltage into V1 is performed. [8] [V
In the case of 1 ← battery voltage], the battery voltage is taken into V1 only for the first time. In [f = 1] of << 9 >>, f is set to 1 because the first voltage acquisition is not performed thereafter.

【００２０】《１０》の［Ｖ２←電池電圧］では、電池
電圧をＶ２に取り込む。《１１》の［＜ｄｖ／ｄｔを求
める＞］では、ｄｖ／ｄｔを求めｄｖ２に代入する。In [10] [V2 ← battery voltage], the battery voltage is taken into V2. In [11] [<Dv / dt is obtained>], dv / dt is obtained and substituted into dv2.

【００２１】《１２》の［ｄｖ２の移動平均処理（１０
回）］では、ｄｖ２の移動平均処理をする。平均回数は
１０回。《１３》の［ｄｖ２＞ｄｖＭａｘ］では、ｄｖ
２とｄｖＭａｘとの比較を行いｄｖ２の方が大きい場合
は《１４》へ移行する。《１４》の［ｄｖＭａｘ←ｄｖ
２］では、ｄｖＭａｘにｄｖ２を代入する。[Dv2 moving average processing of (12) (10
Times)], a moving average process of dv2 is performed. The average number of times is 10. In [dv2> dvMax] of << 13 >>, dv
2 is compared with dvMax, and if dv2 is larger, the process proceeds to << 14 >>. [DvMax ← dv of << 14 >>
In 2], dv2 is substituted for dvMax.

【００２２】《１５》の［（ｄｖＭａｘ−ｄｖ２）≧
０．０００５Ｖ／１０秒］では、変化量の最大値（ｄｖ
Ｍａｘ）と最新の変化量（ｄｖ２）との比較を行い、最
大値より０．０００５Ｖ／１０秒以上下がったら《１
７》へ行く、違う場合は《１６》へ行く。《１６》の
［Ｖ１−Ｖ２，ｎ＝０］では、１０秒前の電圧保持Ｖ１
を今回の電圧Ｖ２に置き換える。これで次回の《１３》
にきた時に１０秒前の電圧と比較が行える。また、１０
秒のカウントを行うためのｎを０にリセットする。[(DvMax-dv2) of << 15 >>
0.0005V / 10 seconds], the maximum change amount (dv
Max) and the latest amount of change (dv2) are compared, and if it falls below the maximum value by 0.0005V / 10 seconds or more << 1
7), if not, go to << 16 >>. In [V1-V2, n = 0] of << 16 >>, voltage hold V1 10 seconds before
Is replaced with the current voltage V2. This is the next << 13 >>
You can compare the voltage with 10 seconds before. Also, 10
Reset n to count seconds to zero.

【００２３】《１７》の［充電停止信号出力］では、充
電用電源装置にパラレルポートを通して停止信号を送
る。これにより電源装置から電池への電気の供給が止め
られ、充電終了となる。In [17] [Output charge stop signal], a stop signal is sent to the charging power supply device through the parallel port. As a result, the supply of electricity from the power supply device to the battery is stopped, and the charging is completed.

【００２４】なお、電圧変化量（ｄｖ／ｄｔ）が最大に
達した時点の値より、好ましい範囲の０．０００５〜
０．００１０Ｖ／１０秒の電圧変化量（ｄｖ／ｄｔ）の
低下が生じた時に、開閉器４に電源３との接続を中止す
る切断信号を送る場合には、［（ｄｖＭａｘ−ｄｖ２）
≧０．０００５〜０．００１５Ｖ／１０秒］を［（ｄｖ
Ｍａｘ−ｄｖ２）≧０．０００５〜０．００１０Ｖ／１
０秒］と設定することにより制御する。It should be noted that, from the value at the time when the voltage change amount (dv / dt) reaches the maximum, 0.0005-
When a disconnection signal for stopping the connection with the power supply 3 is sent to the switch 4 when the voltage change amount (dv / dt) of 0.0010 V / 10 seconds is reduced, [(dvMax-dv2)
≧ 0.0005 to 0.0015V / 10 seconds] [(dv
Max-dv2) ≧ 0.0005 to 0.0010V / 1
0 second] to control.

【００２５】(4) 接 続 これら構成機器は、図１に示す様に、電源３と開閉器４
とが主電源スイッチ１３及び主電源コード８を介して接
続され、更に、開閉器４と二次電池２とが充電用電気コ
ード９により接続されている。また、二次電池２と電圧
測定器５とが電圧測定用電気コード１０により接続さ
れ、該電圧測定器５と制御器６とがデータ送信用電気コ
ード１１により接続され、更に、該制御器６と前記開閉
器４とが電気信号用電気コード１２により接続されてい
る。従って、二次電池２の電圧の測定値がデータ送信用
電気コード１１を介して制御器６にて比較計算されて、
その結果、所定の数値に達した際に、その信号を電気信
号用電気コード１２を介して開閉器４に送って開閉器４
の接続／切断を行っている。(4) Connection As shown in FIG. 1, these constituent devices have a power source 3 and a switch 4
Are connected via the main power switch 13 and the main power cord 8, and the switch 4 and the secondary battery 2 are connected via a charging electric cord 9. Further, the secondary battery 2 and the voltage measuring device 5 are connected by a voltage measuring electric cord 10, the voltage measuring device 5 and a controller 6 are connected by a data transmitting electric cord 11, and the controller 6 is further connected. The switch 4 and the switch 4 are connected by an electric cord 12 for electric signals. Therefore, the measured value of the voltage of the secondary battery 2 is compared and calculated by the controller 6 via the data transmission electric cord 11,
As a result, when the predetermined value is reached, the signal is sent to the switch 4 via the electric signal electric cord 12 to make the switch 4
Connecting / disconnecting.

【００２６】(5) 制御器の計算 上記制御器６における計算については、電圧測定器５に
より測定されたデータを単位時間当たりの電圧の変化量
（ｄｖ／ｄｔ）として算出し、その電圧の変化量（ｄｖ
／ｄｔ）が最大に達した時点の値よりも０．０００５〜
０．００１５Ｖ／１０秒の電圧変化量の低下が生じてい
るかを算出し、上記電圧変化量の低下が生じているかを
判定して、上記範囲内である時に、前記開閉器４に電源
３との接続を中止する切断信号を電気信号用電気コード
１２にて送る。(5) Calculation of Controller Regarding the calculation in the controller 6, the data measured by the voltage measuring device 5 is calculated as the amount of change (dv / dt) in voltage per unit time, and the change in voltage is calculated. Amount (dv
/ Dt) is 0.0005 than the value when it reaches the maximum
It is calculated whether or not the voltage change amount of 0.0015V / 10 seconds has decreased, and it is determined whether or not the voltage change amount has decreased, and when it is within the above range, the switch 4 is connected to the power source 3 and A disconnection signal for stopping the connection is sent by the electric cord 12 for electric signals.

【００２７】[II] 二次電池の充電方法 (1) 充電制御装置 本発明の二次電池の充電方法において用いられる装置１
としては、通常、図１又は図２に示す如き、構造の充電
制御装置１，７が用いられる。[II] Rechargeable Battery Charging Method (1) Charge Control Device Device 1 Used in the Rechargeable Battery Charging Method of the Present Invention
For this, normally, charge control devices 1 and 7 having a structure as shown in FIG. 1 or 2 are used.

【００２８】(2) 接 続 (A) 電源の接続 本発明の二次電池の充電方法において、二次電池２に充
電を行うためには、二次電池２のプラス極及びマイナス
極がそれぞれ開閉器４を介して電源３のプラス極及びマ
イナス極とに接続される。(2) Connection (A) Connection of power source In the secondary battery charging method of the present invention, in order to charge the secondary battery 2, the positive electrode and the negative electrode of the secondary battery 2 are opened and closed respectively. It is connected to the positive and negative poles of the power source 3 via the device 4.

【００２９】(B) 電圧測定器の接続 二次電池２には充電された電気量を測定するための電圧
測定器５が接続されて、二次電池２の電圧が測定され
る。該電圧測定器５にはその時点の電池の電圧を表示す
る表示器５ａが設けられていることが好ましい。この電
圧測定器５には制御器６が接続されていて、該制御器６
には開閉器４が接続されている。(B) Connection of voltage measuring device The voltage measuring device 5 for measuring the charged quantity of electricity is connected to the secondary battery 2 and the voltage of the secondary battery 2 is measured. The voltage measuring device 5 is preferably provided with a display device 5a for displaying the voltage of the battery at that time. A controller 6 is connected to the voltage measuring device 5, and the controller 6
A switch 4 is connected to.

【００３０】(3) 電池の充電 (A) 電源スイッチ 上記電源３の主電源スイッチ１３を「入」にして二次電
池２に充電を開始する。(3) Battery Charging (A) Power Switch The main power switch 13 of the power source 3 is turned on to start charging the secondary battery 2.

【００３１】(B) 電圧測定器の作動 上記主電源スイッチ１３を入れることにより電池２に電
気が充電されて電圧測定器５が電池２の電圧を測定し
て、その時点における電池２の電圧を表示器５ａに表示
する。そして、時間の経過と共に徐々に電圧が上昇す
る。(B) Operation of the voltage measuring device When the main power switch 13 is turned on, the battery 2 is charged with electricity, the voltage measuring device 5 measures the voltage of the battery 2, and the voltage of the battery 2 at that time is measured. It is displayed on the display 5a. Then, the voltage gradually increases with the passage of time.

【００３２】(C) 制御器の作動 上記電圧測定器５に接続されている制御器６が作動し、
その時の電池２の電圧と所定時間後の電池２の電圧を測
定して、単位時間当たりの電圧の変化量（ｄｖ／ｄｔ）
を求めて、単位時間当たりの電圧の変化量（ｄｖ／ｄ
ｔ）を算出し、その値が最大に達した時点の電圧変化量
の値を求める。そして、その時の電圧変化量の値が最大
値を示す時点の電圧変化量の値よりも０．０００５〜
０．００１５Ｖ／１０秒の低下が生じたかを算出して、
上記電圧変化量の低下が生じたかを判定して、電源との
接続を中止するための充電停止信号を電気信号用電気コ
ード１２を通じて開閉器４に送る。(C) Operation of controller The controller 6 connected to the above voltage measuring device 5 operates,
The voltage of the battery 2 at that time and the voltage of the battery 2 after a predetermined time are measured, and the change amount of the voltage per unit time (dv / dt)
And the amount of change in voltage per unit time (dv / d
t) is calculated, and the value of the voltage change amount at the time when the value reaches the maximum is obtained. The value of the voltage change amount at that time is 0.0005
Calculate whether a decrease of 0.0015V / 10 seconds has occurred,
It is determined whether or not the amount of voltage change has decreased, and a charge stop signal for stopping the connection with the power supply is sent to the switch 4 through the electric signal electric cord 12.

【００３３】(D) 開閉器の作動 上記制御器６の電源３と二次電池２との接続を中止する
ための充電停止信号により開閉器４が閉じられ、二次電
池２の充電を停止する。(D) Operation of switch The switch 4 is closed by a charge stop signal for stopping the connection between the power source 3 of the controller 6 and the secondary battery 2, and the charging of the secondary battery 2 is stopped. .

【００３４】(4) 充電電池の電圧の確認 充電された二次電池２の電圧を電圧測定器５の表示器５
ａにより確認する。(4) Confirmation of the voltage of the rechargeable battery The voltage of the charged secondary battery 2 is indicated by the indicator 5 of the voltage measuring device 5.
Confirm by a.

【００３５】(5) 主電源スイッチの作動 安全のため、電源２の主電源スイッチ１３を「切」にし
て充電された二次電池２を所定の位置より取り外すこと
により取り出す。(5) For the safety of the operation of the main power switch, the main power switch 13 of the power source 2 is turned "off" and the charged secondary battery 2 is taken out from the predetermined position.

【００３６】[III] 用 途 本発明の二次電池の充電装置は、充放電を繰り返し行う
ことによるメモリー効果があっても、充電する電池の単
位時間当たりの電圧の変化量を算出して、その電圧変化
量の値が最大に達した時点の電圧変化量の値よりも０．
０００５〜０．００１５Ｖ／１０秒の電圧変化量の低下
が生じたかを判定して、電源との接続を中止するための
充電停止信号を開閉器に送り、電源と切断して充電を停
止することから、過充電とすることがないので、鉛蓄電
池、密閉型鉛蓄電池、ニッケル・カドミウム電池、密閉
型ニッケル・カドミウム電池、ニッケル・亜鉛電池、ニ
ッケル・鉄電池、酸化銀蓄電池、ニッケル・水素電池、
密閉型ニッケル・金属水素化物電池、リチウム二次電
池、リチウム・硫化鉄電池、亜鉛・酸化銀電池等の各種
二次電池の充電装置として使用することができるが、特
に密閉型ニッケル・金属水素化物電池の充電装置として
使用することが好ましい。[III] Usage The secondary battery charging device of the present invention calculates the amount of change in voltage per unit time of the battery to be charged, even if there is a memory effect due to repeated charging and discharging. The value of the voltage change amount at the time when the value of the voltage change amount reaches the maximum is 0.
To determine whether a decrease in voltage change amount of 0005 to 0.0015 V / 10 seconds has occurred, send a charge stop signal for stopping the connection with the power supply to the switch, disconnect from the power supply, and stop charging. Therefore, since it will not be overcharged, lead acid battery, sealed lead acid battery, nickel cadmium battery, sealed nickel cadmium battery, nickel zinc battery, nickel iron battery, silver oxide battery, nickel hydrogen battery,
It can be used as a charging device for various secondary batteries such as sealed nickel / metal hydride batteries, lithium secondary batteries, lithium / iron sulfide batteries, zinc / silver oxide batteries, etc., but especially sealed nickel / metal hydride batteries It is preferably used as a battery charger.

【００３７】[0037]

【実施例】以下に示す実施例及び比較例によって、本発
明を更に具体的に説明する。 [I] 評価方法 (1) 単位時間当たりの電圧変化量（ｄｖ／ｄｔ）の測
定 二次電池の単位時間当たりの電圧変化量（ｄｖ／ｄｔ）
の測定は、充電する二次電池にデジタル型表示器付き可
動コイル型電圧計（マルチメータ ＭＥＴＥＸＭ−４６
６０Ａ）を接続し、充電を行った際の単位時間当たりの
電圧変化量（ｄｖ／ｄｔ）をパーソナルコンピューター
（コンパック社製プロネリア１０００）によって算出す
ることによって測定した。EXAMPLES The present invention will be described in more detail with reference to the following examples and comparative examples. [I] Evaluation method (1) Measurement of voltage change per unit time (dv / dt) Voltage change per unit time of secondary battery (dv / dt)
Is measured by a moving coil voltmeter (multimeter METEXM-46) with a digital display on the secondary battery to be charged.
60A) was connected, and the voltage change amount (dv / dt) per unit time when charging was performed was measured by calculating with a personal computer (Pronellia 1000 manufactured by Compaq).

【００３８】(2) 充電率の測定 充電率の測定は、１．６Ａの充電電流で充電を行い、そ
れに要した充電時間（ｈ）とから、充電容量を計算し、
この容量の理論容量に対する割合を計算することにより
充電率を算出した。具体的には、以下に示す計算式にて
充電率を算出した。 充電電流（１．６Ａ）×充電に要した時間（ｈ）＝電池
容量（Ａｈ） 電池容量／理論容量＝充電率（％）(2) Measurement of charging rate The charging rate was measured by charging with a charging current of 1.6 A, and the charging capacity was calculated from the charging time (h) required for the charging,
The charging rate was calculated by calculating the ratio of this capacity to the theoretical capacity. Specifically, the charging rate was calculated by the following calculation formula. Charging current (1.6 A) x time required for charging (h) = battery capacity (Ah) Battery capacity / theoretical capacity = charging rate (%)

【００３９】(3) 電池寿命の測定 電池寿命（サイクル試験）の測定は、充電を上記「(1)
充電率の測定」と同様の方法で行い、放電を（株）日
鉄エレックス製充放電試験装置（５０Ｖ−１００Ａ）を
用いて、下記のパターンで行った。３Ａ：１秒間−４０
Ａ：１秒間−休止：１秒間−３０Ａ：１秒間−３Ａ：１
秒間−４０Ａ：１秒間−休止：１秒間−３０Ａ：１秒間
−３Ａ：２秒間−５Ａ：３５秒間（１パターン４５秒
間）、放電は４．５Ｖ／５Ｃｅｌｌｓで終了とする。充
電→放電 放電→充電への移行は、２６℃の温度待ちで
行った。試験環境温度は２５℃（恒温槽：ＳＡＮＹＯ
ＩＮＣＵＢＡＴＯＲ ＭＩＲ−５５３）であった。(3) Measurement of battery life For battery life (cycle test) measurement, charge as described in "(1)
The measurement was performed in the same manner as in "Measurement of Charging Rate", and discharging was performed using a charge / discharge tester (50V-100A) manufactured by Nittetsu Elex Co., Ltd. in the following pattern. 3A: -40 for 1 second
A: 1 second-Pause: 1 second-30A: 1 second-3A: 1
Second −40 A: 1 second − Rest: 1 second −30 A: 1 second −3 A: 2 seconds −5 A: 35 seconds (1 pattern 45 seconds), and discharge is terminated at 4.5 V / 5 Cells. The transition from charging to discharging to discharging to charging was performed while waiting for the temperature of 26 ° C. Test environment temperature is 25 ℃ (constant temperature bath: SANYO
INCUBATOR MIR-553).

【００４０】(4) 電池圧力の測定 電池圧力の測定は、（株）共和電業製小型圧力センサＰ
ＧＭ−５０ＫＤを用いて、該小型圧力センサを直接電池
に取り付けて測定を行った。(4) Measurement of battery pressure The battery pressure is measured by the small pressure sensor P manufactured by Kyowa Denki Co., Ltd.
Using GM-50KD, the small pressure sensor was directly attached to the battery for measurement.

【００４１】(5) 寿命に至るまでの使用可能な電力量
（ｋＷｈ）の測定 電池の寿命に至るまでの使用可能な電力量（ｋＷｈ）へ
の換算は、１サイクル当たり放電容量４．８Ａｈ、平均
電圧２４Ｖであることから、１１５．２Ｗｈとなり、電
池寿命のサイクル数をかけた値である。(5) Measurement of usable electric energy (kWh) until the end of life The usable electric energy (kWh) until the end of battery life is converted into a discharge capacity of 4.8 Ah per cycle, Since the average voltage is 24 V, it becomes 115.2 Wh, which is a value obtained by multiplying the number of battery life cycles.

【００４２】[II] 実施例及び比較例 実施例１ (1) 正極電極の作製 活物質として水酸化ニッケル粉末１００重量部、導電剤
としてコバルト粉末３重量部、結着剤（バインダー）と
してポリビニルアルコール０．８重量部との混合物に水
及びエチルアルコールを加え、混練してペースト状に調
製して、このペーストをニッケル発泡金属からなる多孔
体に充填し、乾燥させた後、圧延して正極電極を得た。
上記工程により得られた正極電極を、３０重量％水酸化
カリウム水溶液を満たした処理槽内に浸漬して、１セル
相当の充電電圧が０．１ＣＡ（定電圧）で、コバルト等
の添加物が全てＣｏＯＯＨに変化するために必要な電気
量のプリチャージを行った。プリチャージを行う際の対
極としてはニッケル板を用いた。[II] Examples and Comparative Examples Example 1 (1) Preparation of Positive Electrode 100 parts by weight of nickel hydroxide powder as an active material, 3 parts by weight of cobalt powder as a conductive agent, polyvinyl alcohol as a binder. Water and ethyl alcohol were added to a mixture with 0.8 parts by weight and kneaded to prepare a paste, which was filled in a porous body made of nickel foam metal, dried, and then rolled to produce a positive electrode. Got
The positive electrode obtained by the above process was immersed in a treatment tank filled with a 30 wt% potassium hydroxide aqueous solution, and the charging voltage of one cell was 0.1 CA (constant voltage), and an additive such as cobalt was added. Precharging was performed with an amount of electricity required to change all to CoOOH. A nickel plate was used as a counter electrode for precharging.

【００４３】(2) 負極電極の作製 次に、ミッシュメタル系水素吸蔵合金であるＬｍＮｉ
３．６７Ｃｏ０．８Ｍｎ ０．４Ａｌ０．３で示される合
金粉末１００重量部、ポリテトラフルオロエチレンを
１．５重量部、導電剤としてカーボン粉末０．５重量部
との混合物に水を加え、混練してペースト状に調製し
て、このペーストを鉄にニッケルメッキしたパンチング
メタルに塗布し、乾燥させた後、圧延して負極電極を得
た。(2) Preparation of negative electrode Next, LmNi which is a misch metal type hydrogen storage alloy
3.67Co0.8Mn 0.4Al0.3When indicated by
100 parts by weight of gold powder, polytetrafluoroethylene
1.5 parts by weight, 0.5 parts by weight of carbon powder as a conductive agent
Add water to the mixture with and knead to prepare a paste.
Punching this paste with nickel plating on iron
Apply to metal, dry, and roll to obtain negative electrode
It was

【００４４】(3) 二次電池の製造 上記正極電極と負極電極をシート状に成形した後、両電
極シート間にセパレータシートで隔離して積層した電極
積層シートを製造した。上記電極積層シートを円筒状に
捲回して鋼鉄板製電池外装缶内に収納した後、３０重量
％水酸化カリウムの水溶液を注入して、電池外装缶に蓋
を載せて電池外装缶の上端の縁部を捲き締めして密閉
し、密閉型ニッケル・水素化物電池を製造した。(3) Manufacture of Secondary Battery After the above-mentioned positive electrode and negative electrode were formed into a sheet shape, an electrode laminated sheet was manufactured by separating and laminating both electrode sheets with a separator sheet. After the above electrode laminated sheet was rolled into a cylindrical shape and stored in a steel plate battery outer can, an aqueous solution of 30 wt% potassium hydroxide was injected, and a lid was placed on the battery outer can to cover the upper end of the battery outer can. The edge portion was wound and sealed to manufacture a sealed nickel-hydride battery.

【００４５】(4) 活性化 上記工程により得られた二次電池を、充電条件０．１Ｃ
Ａ×１１ｈｒｓ、放電条件０．３３ＣＡ（１／３ＣＡ）
ｔｏ０．９Ｖにて６サイクルの充放電を行うことにより
活性化を行った。(4) Activation The secondary battery obtained by the above process was charged under a charging condition of 0.1C.
A × 11 hrs, discharge condition 0.33 CA (1/3 CA)
Activation was performed by charging and discharging for 6 cycles at to 0.9V.

【００４６】(5) 充放電 下記に示す本発明の二次電池の充電装置を用いて、電池
に電源を接続し、更に電池に電圧測定器を接続した後、
電源の主電源スイッチを「入」にして充電を開始した。
電池の電圧と所定時間後の電池の電圧を測定して、単位
時間当たりの電圧の変化量（ｄｖ／ｄｔ）を求めて、単
位時間当たりの電圧の変化量を算出した。その時の電圧
変化量のノイズ及びふらつきは０．０００１Ｖであっ
た。そして、その電圧変化量が最大値に達した時点の値
よりも０．０００５Ｖ／１０秒の電圧変化量の低下が生
じた時点で、電源との接続を中止するための充電停止信
号を電気信号用電線を通じて開閉器に送り、開閉器を作
動させて電源との接続を止めて充電を中止した。また、
その時に描かれた充電時間の経過による電圧のカーブと
電圧変化量（Ｖ／６０秒）のカーブを図４として示す。(5) Charging / Discharging Using a charging device for a secondary battery of the present invention shown below, after connecting a power source to the battery and further connecting a voltage measuring device to the battery,
The main power switch of the power supply was turned on to start charging.
The voltage of the battery and the voltage of the battery after a predetermined time were measured, the amount of change in voltage per unit time (dv / dt) was obtained, and the amount of change in voltage per unit time was calculated. The noise and fluctuation of the voltage change amount at that time were 0.0001V. Then, when the voltage change amount decreases by 0.0005V / 10 seconds from the value when the voltage change amount reaches the maximum value, a charge stop signal for stopping the connection with the power supply is supplied as an electric signal. It was sent to the switch through the electric wire, and the switch was activated to stop the connection with the power supply and stop charging. Also,
The voltage curve and the voltage change amount (V / 60 seconds) curve with the passage of the charging time drawn at that time are shown in FIG.

【００４７】［二次電池の充電制御装置］ 電源装置 ：菊水電源装置 ３０Ｖ ６Ａ 電池充電条件：２５℃恒温槽（ＳＡＮＹＯ ＩＮＣＵＢ
ＡＴＯＲ ＭＩＲ−５５３） 電圧測定器 ：デジタル型表示器付き電圧計（韓国メテ
ックス社製 ＭＥＴＥＸ Ｍ−４６６０Ａ） 制御器 ：パーソナルコンピューター（コンパック
社製プロネリア１０００）[Charge control device for secondary battery] Power supply device: Kikusui power supply device 30V 6A Battery charging condition: 25 ° C constant temperature oven (SANYO INCUB
ATOR MIR-553) Voltage measuring device: Voltmeter with digital type display (METEX M-4660A manufactured by Korea Metex Co., Ltd.) Controller: Personal computer (Properia 1000 manufactured by Compaq Co., Ltd.)

【００４８】(6) 評 価 上記電池を（株）日鉄エレックス製充放電試験装置（５
０Ｖ−１００Ａ）を用いて、放電パターンを３Ａ：１秒
間−４０Ａ：１秒間−休止：１秒間−３０Ａ：１秒間−
３Ａ：１秒間−４０Ａ：１秒間−休止：１秒間−３０
Ａ：１秒間−３Ａ：２秒間−５Ａ：３５秒間（１パター
ン４５秒間）にして放電し、上記充電と放電とを繰り返
すサイクル試験を行って、電池の評価を行った。その結
果を表１に示す。(6) Evaluation The above battery was used as a charge / discharge testing device (5
0V-100A), the discharge pattern is 3A: 1 second-40A: 1 second-Pause: 1 second-30A: 1 second-
3A: 1 second-40A: 1 second-Pause: 1 second-30
A: 1 second-3 A: 2 seconds-5 A: 35 seconds (1 pattern 45 seconds) were discharged, and a cycle test in which the above charging and discharging were repeated was performed to evaluate the battery. The results are shown in Table 1.

【００４９】比較例１ 電池の活性化及びサイクル試験を、市販される電池の充
電装置を用いて、常に充電率１０５％の状態で行った以
外は実施例１と同様に実施した。その結果を表１に示
す。また、充電率と電池内の圧力の測定を（株）共和電
業製小型圧力センサＰＧＭ−５０ＫＤを用いて行い、そ
の結果を図５として示す。Comparative Example 1 A battery activation and cycle test were conducted in the same manner as in Example 1 except that a commercially available battery charger was used and the charging rate was always 105%. The results are shown in Table 1. Further, the charging rate and the pressure inside the battery were measured using a small pressure sensor PGM-50KD manufactured by Kyowa Denki Co., Ltd., and the results are shown in FIG.

【００５０】比較例２ 実施例１において、電圧変化量が最大値を示す電圧の変
化量（ｄｖ／ｄｔ）が最大値（電圧変化量のピーク時）
を示す時点で、電源との接続を中止するための充電停止
信号を電気信号用電線を通じて開閉器に送り、開閉器を
作動させて電源との接続を止めて充電を中止した以外は
実施例１に記載の方法と同様に実施した。その結果を表
１に示す。Comparative Example 2 In Example 1, the voltage change amount shows the maximum value. The voltage change amount (dv / dt) shows the maximum value (when the voltage change amount is at the peak).
Example 1 except that the charging stop signal for stopping the connection with the power source was sent to the switch through the electric signal wire to operate the switch to stop the connection with the power source and stop the charging The same procedure as described in 1. was carried out. The results are shown in Table 1.

【００５１】[0051]

【表１】 [Table 1]

【００５２】[0052]

【発明の効果】このような本発明の二次電池の充電方法
及び装置は、充放電を繰り返し行うことによるメモリー
効果があっても、充電する電池の単位時間当たりの電圧
の変化量を算出して、その電圧変化量の値が最大に達し
た時点の電圧変化量の値よりも０．０００５〜０．００
１５Ｖ／１０秒の電圧変化量の低下が生じたかを判定し
て、電源との接続を中止するための充電停止信号を開閉
器に送り、電源と切断して充電を停止することから、過
充電とすることがないので、充電率が９５％を過ぎると
急激に上昇する内部圧力が上昇し難いので取り扱いが安
全であり、しかも、電池寿命を２割程度向上させること
ができるので、過充電を防止し、電池容器内の圧力を低
く抑えて安全性を高め、充電容量を適度に高めて、電池
寿命を長くして二次電池を長期間安全に使用することが
できる。[Effects of the Invention] The secondary battery charging method and device of the present invention as described above calculates the amount of change in voltage per unit time of the battery to be charged even if there is a memory effect due to repeated charging and discharging. The value of the amount of voltage change reaches 0.0005 to 0.00
Overcharging is performed by determining whether the voltage change amount has dropped for 15 V / 10 seconds and sending a charge stop signal to the switch to stop the connection with the power supply and disconnecting from the power supply to stop charging. Since the internal pressure that rises rapidly when the charging rate exceeds 95% is hard to rise, it is safe to handle, and the battery life can be improved by about 20%. It is possible to prevent, suppress the pressure in the battery container to a low level to enhance safety, to appropriately increase the charging capacity, to extend the battery life, and to safely use the secondary battery for a long period of time.

【図面の簡単な説明】[Brief description of drawings]

【図１】図１は、本発明の二次電池の充電装置の概略図
である。FIG. 1 is a schematic diagram of a secondary battery charging device of the present invention.

【図２】図２は、一体化した本発明の二次電池の充電装
置の概略図である。FIG. 2 is a schematic diagram of an integrated secondary battery charging device of the present invention.

【図３】図３は、電池電圧の変化量を検出して電池の充
電制御を行う場合のフローチャート図である。FIG. 3 is a flowchart of a case in which the amount of change in battery voltage is detected and battery charging is controlled.

【図４】図４は、本発明の二次電池の充電装置により充
電した際の充電時間の経過による電圧カーブとｄＶ変化
量のカーブを表す図である。FIG. 4 is a diagram showing a voltage curve and a dV change amount curve with the passage of charging time when the battery is charged by the secondary battery charging device of the present invention.

【図５】図５は、実施例によって描かれた充電率と電池
内部圧力との関係を表す図である。FIG. 5 is a diagram showing a relationship between a charging rate and a battery internal pressure drawn according to an example.

【符号の説明】[Explanation of symbols]

１ 二次電池の充電装置 ２ 二次電池 ３ 電源 ４ 開閉器 ５ 電圧測定器 ５ａ 表示器 ６ 制御器 ７ 一体型の電池の充電装置 ８ 主電源コード ９ 充電用電気コード １０ 電圧測定用電気コード １１ データ送信用電気コード １２ 電気信号用電気コード １３ 主電源スイッチ 1 Rechargeable battery charger 2 Secondary battery 3 power supplies 4 switch 5 Voltage measuring device 5a indicator 6 controller 7 Integrated battery charger 8 main power cord 9 Electric cord for charging 10 Voltage measuring electrical cord 11 Electric code for data transmission 12 Electric code for electric signals 13 Main power switch

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】二次電池を電源と接続することにより充電
を行う二次電池の充電方法において、前記二次電池の電
圧を測定し、その単位時間当たりの電圧変化量（ｄｖ／
ｄｔ）を算出して、その電圧変化量が徐々に増加し、そ
の電圧変化量が最大値に達した時点より０．０００５〜
０．００１５Ｖ／１０秒の電圧の低下が生じた時に二次
電池と電源との接続を中止して充電を停止することを特
徴とする、二次電池の充電方法。1. A method of charging a secondary battery, comprising charging the secondary battery by connecting it to a power source, measuring the voltage of the secondary battery, and changing the voltage per unit time (dv /
dt) is calculated, the amount of voltage change gradually increases, and 0.0005 to 0.55 from the time when the amount of voltage change reaches the maximum value.
A method of charging a secondary battery, characterized in that when a voltage drop of 0.0015 V / 10 seconds occurs, the connection between the secondary battery and the power supply is stopped to stop charging. 【請求項２】充電を行う二次電池が、密閉型ニッケル・
金属水素化物電池である、請求項１に記載の二次電池の
充電方法。2. A secondary battery to be charged is sealed nickel.
The method for charging a secondary battery according to claim 1, which is a metal hydride battery. 【請求項３】電源と接続して電源との接続／切断を行う
ための開閉器と、充電を行う二次電池の電圧を測定する
ための電圧測定器と、該電圧測定器により測定された電
圧の単位時間当たりの電圧変化量（ｄｖ／ｄｔ）を算出
して、その電圧変化量が徐々に増加し、その電圧変化量
が最大値に達した時点より０．０００５〜０．００１５
Ｖ／１０秒の電圧の低下が生じた時に、前記開閉器に二
次電池と電源との接続を中止する信号を送るための制御
器とから構成されていることを特徴とする、二次電池の
充電装置。3. A switch for connecting to and disconnecting from a power source, a voltage measuring device for measuring the voltage of a secondary battery for charging, and a voltage measuring device for measuring the voltage of the secondary battery. The amount of voltage change (dv / dt) per unit time is calculated, the amount of voltage change gradually increases, and 0.0005 to 0.0015 from the time when the amount of voltage change reaches the maximum value.
A secondary battery comprising a controller for sending a signal for stopping the connection between the secondary battery and the power source to the switch when the voltage drops for V / 10 seconds. Charging device. 【請求項４】充電を行う二次電池が、密閉型ニッケル・
金属水素化物電池である、請求項３に記載の二次電池の
充電装置。4. A rechargeable secondary battery is a sealed nickel battery.
The charging device for a secondary battery according to claim 3, which is a metal hydride battery.
JP2002082809A 2002-03-25 2002-03-25 Secondary battery charging method and apparatus Expired - Fee Related JP3875129B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002082809A JP3875129B2 (en) 2002-03-25 2002-03-25 Secondary battery charging method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002082809A JP3875129B2 (en) 2002-03-25 2002-03-25 Secondary battery charging method and apparatus

Publications (2)

Publication Number Publication Date
JP2003284255A true JP2003284255A (en) 2003-10-03
JP3875129B2 JP3875129B2 (en) 2007-01-31

Family

ID=29230858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002082809A Expired - Fee Related JP3875129B2 (en) 2002-03-25 2002-03-25 Secondary battery charging method and apparatus

Country Status (1)

Country Link
JP (1) JP3875129B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007194052A (en) * 2006-01-19 2007-08-02 Lenovo Singapore Pte Ltd Battery pack and method of permanently stopping function of battery pack
JP2012002577A (en) * 2010-06-15 2012-01-05 Fujitsu Telecom Networks Ltd Test device and test method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007194052A (en) * 2006-01-19 2007-08-02 Lenovo Singapore Pte Ltd Battery pack and method of permanently stopping function of battery pack
JP2012002577A (en) * 2010-06-15 2012-01-05 Fujitsu Telecom Networks Ltd Test device and test method

Also Published As

Publication number Publication date
JP3875129B2 (en) 2007-01-31

Similar Documents

Publication Publication Date Title
US11735940B2 (en) Methods and systems for recharging a battery
US6480003B1 (en) Method for detecting deterioration of electrochemical device, method for measuring remaining capacity, charger comprising them, and discharge controller
EP2594006B1 (en) Method and apparatus for recharging a battery
TW200401466A (en) Charger for rechargeable batteries
JPH0678463A (en) Secondary battery device and method of measuring residual capacity
CN102545359B (en) Storage battery charging device and method
CN104064830A (en) Method For Adjusting Nickel-metal Hydride Storage Battery
JP2000116021A (en) Charging system of sealed nickel hydrogen rechargeable battery
EP4024067A1 (en) Battery management system, battery pack, electric vehicle, and battery management method
JP2006092901A (en) Charge-discharge system
JP3875129B2 (en) Secondary battery charging method and apparatus
CN107356880B (en) Battery electric quantity detection method
Broussely et al. Lithium ion: the next generation of long life batteries characteristics, life predictions, and integration into telecommunication systems
JP2011192425A (en) Memory effect reducing circuit, battery power supply device, battery utilization system, and memory effect reducing method
Passerini et al. Lithium-ion batteries for hearing aid applications: II. Pulse discharge and safety tests
JP2000150000A (en) Backup power supply control method
JP4618025B2 (en) Battery pack and charge control method thereof
US11652251B2 (en) Battery state indicator based on recombination device feedback
CN114300759B (en) Method for manufacturing nickel-hydrogen storage battery
JPH11355968A (en) Charging for storage battery and charger therefor
JP2004319336A (en) Charge control method and charge control device of alkaline aqueous solution secondary battery, and battery pack
US20230029949A1 (en) Battery pack and power tool system
EP4300626A1 (en) Method for recovering capacity of alkaline rechargeable battery
Barsukov Battery selection, safety, and monitoring in mobile applications
CN116031513A (en) Electrochemical device management method, electronic device, charging device, and storage medium

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20040927

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20060209

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060214

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060417

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20060929

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20061025

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091102

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101102

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101102

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101102

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111102

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111102

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121102

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121102

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131102

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees