JPH07335265A - Method and device for charging secondary battery - Google Patents

Method and device for charging secondary battery

Info

Publication number
JPH07335265A
JPH07335265A JP6152613A JP15261394A JPH07335265A JP H07335265 A JPH07335265 A JP H07335265A JP 6152613 A JP6152613 A JP 6152613A JP 15261394 A JP15261394 A JP 15261394A JP H07335265 A JPH07335265 A JP H07335265A
Authority
JP
Japan
Prior art keywords
charging
secondary battery
voltage
aqueous secondary
charged
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.)
Withdrawn
Application number
JP6152613A
Other languages
Japanese (ja)
Inventor
Takeji Tanjiyou
雄児 丹上
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP6152613A priority Critical patent/JPH07335265A/en
Publication of JPH07335265A publication Critical patent/JPH07335265A/en
Withdrawn legal-status Critical Current

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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)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

PURPOSE:To prevent deteriorated performance when a nonaqueous system secondary battery is quickly charged. CONSTITUTION:A device comprises a voltage detecting part 3 connected to output terminals A, B to detect terminal voltage of a battery 2 charged, arithmetic part 4 calculating a charge quantity with which the battery must be charged in accordance with this detecting value to output this arithmetic value, control part 5 controlling a charging part 8, charging part 8 outputting a charge current through the output terminal A, B, current detecting part 6 detecting this charge current and an arithmetic part 7 calculating a charge quantity based on this detecting value to output this arithmetic value. In the charging part 8, the battery is charged with 4.4V fixed voltage higher than open circuit voltage by 0.2V in a full charge of the battery 2, and by constituting the control part 5 to end charging when a charge quantity calculated to be based on voltage of the battery 2 and a charge quantity obtained by integrating from a charge current are equalized, an overdischarging is eliminated to prevent deterioration while a quick charging can be performed.

Description

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

【０００１】[0001]

【産業上の利用分野】この発明は、二次電池の充電装置
であって、とくに非水系二次電池の急速充電に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for a secondary battery, and more particularly to a rapid charging of a non-aqueous secondary battery.

【０００２】[0002]

【従来の技術】近年、環境問題の観点から電気自動車の
開発が実用化に向かって盛んに行なわれている。それに
伴なって電気自動車の駆動源である車載電池に対して、
より軽量、小型のものが求められるようになった。この
ために、従来のニッケル・カドミウム二次電池や鉛蓄電
池などの小型化、大容量化の努力が続けられているが、
一方で、高エネルギー密度、高い作動電圧などの車載電
池に適合した特性を有する非水系の二次電池には大きな
期待が寄せられている。2. Description of the Related Art In recent years, electric vehicles have been actively developed from the viewpoint of environmental problems toward practical use. Along with that, for the in-vehicle battery that is the drive source of the electric vehicle,
Lighter and smaller products have been demanded. For this reason, efforts have been made to reduce the size and increase the capacity of conventional nickel-cadmium secondary batteries and lead storage batteries.
On the other hand, there are great expectations for non-aqueous secondary batteries that have characteristics suitable for in-vehicle batteries, such as high energy density and high operating voltage.

【０００３】非水系二次電池の充電特性に関しては、電
池の端子電圧がその電池内の電気量に強く相関する。す
なわち、電池の端子電圧はその内部の電気量を反映す
る。放電された電池を充電するときに電池内の電気量が
増すにつれて端子電圧が上昇し、端子電圧が満充電での
端子電圧に達すると電池が満充電になる。そして、満充
電になった電池になお充電を続けると電池内に電気量は
増加しないのに端子電圧は上昇を続ける。このように端
子電圧が満充電での端子電圧より高くなると、電池容量
が低下し、性能が劣化してしまい、電池内部にはガスが
発生してしまう恐れがある。Regarding the charging characteristics of a non-aqueous secondary battery, the terminal voltage of the battery has a strong correlation with the amount of electricity in the battery. That is, the terminal voltage of the battery reflects the amount of electricity inside. When charging a discharged battery, the terminal voltage rises as the amount of electricity in the battery increases, and when the terminal voltage reaches the terminal voltage at full charge, the battery becomes fully charged. When the fully charged battery is still charged, the terminal voltage continues to increase although the amount of electricity in the battery does not increase. When the terminal voltage becomes higher than the terminal voltage at full charge, the battery capacity decreases, the performance deteriorates, and gas may be generated inside the battery.

【０００４】これを防ぐためには、定電流−定電圧の組
み合わせ方式で、充電初期、中期は定電流で比較的急速
に充電し、充電の進行とともに端子電圧が設定電圧に達
したら定電圧充電に移行して充電電流を減少しながら充
電を続け、そして充電電流が流れなくなったら、または
０に近くなったら充電を停止するという充電方法が用い
られる。In order to prevent this, a constant current-constant voltage combination system is used to charge relatively quickly with a constant current in the initial and middle stages of charging, and when the terminal voltage reaches a set voltage as the charging progresses, constant voltage charging is performed. A charging method is used in which the charging is continued while reducing the charging current, and the charging is stopped when the charging current stops flowing or approaches 0.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、このよ
うな従来の充電方法にあっては、定電圧充電の電圧値が
満充電での端子電圧に合わせて設定されるため、端子電
圧の高い充電末期では充電電流がかなり小さくなってい
る。しかも、満充電をするには充電電流が０となるまで
充電する必要がある。従って、満充電に至るまでの充電
がかなり長時間を要するという問題があった。この発明
は、上記従来の問題点に鑑み、電池の性能を損なうこと
なく、急速充電を可能にした充電方法及び充電装置を提
供することを目的とする。However, in such a conventional charging method, since the voltage value of constant voltage charging is set in accordance with the terminal voltage at full charge, the terminal charging period with high terminal voltage is high. In the charging current is quite small. In addition, in order to fully charge, it is necessary to charge until the charging current becomes zero. Therefore, there is a problem that it takes a considerably long time to fully charge the battery. In view of the above-mentioned conventional problems, an object of the present invention is to provide a charging method and a charging device that enable rapid charging without impairing the performance of the battery.

【０００６】[0006]

【課題を解決するための手段】請求項１記載の発明は、
充電後期、または全期間を定電圧で充電する非水系二次
電池の充電方法において、前記定電圧値が前記非水系二
次電池の満充電での開回路電圧より大きく、かつ該開回
路電圧より０．４Ｖ高い電圧値以下の範囲で設定される
ものとした。なお前記定電圧値を前記開回路電圧より
０．２〜０．４Ｖ高く設定するのがより好ましい。請求
項３記載の発明は、充電後期、または全期間を定電圧で
充電する非水系二次電池の充電装置において、前記非水
系二次電池を充電する充電手段を備え、該充電手段は前
記定電圧として前記非水系二次電池の満充電での開回路
電圧より大きく、かつ該開回路電圧より０．４Ｖ高い電
圧値以下の範囲内の電圧で充電するように構成されるも
のとした。なお前記定電圧を前記開回路電圧より０．２
〜０．４Ｖ高く設定するのがより好ましい。The invention according to claim 1 is
In the charging method of a non-aqueous secondary battery in which the latter half of charging or the entire period is charged with a constant voltage, the constant voltage value is larger than an open circuit voltage at full charge of the non-aqueous secondary battery, and more than the open circuit voltage. It is assumed that the voltage is set in the range of 0.4 V higher voltage value or less. It is more preferable to set the constant voltage value to 0.2 to 0.4 V higher than the open circuit voltage. According to a third aspect of the present invention, in a charging device for a non-aqueous secondary battery that charges a latter half of charging or a whole period at a constant voltage, the charging device includes a charging unit that charges the non-aqueous secondary battery. The non-aqueous secondary battery is configured to be charged at a voltage within a range of a voltage value that is higher than the open circuit voltage at full charge and 0.4 V higher than the open circuit voltage. It should be noted that the constant voltage is 0.2 than the open circuit voltage.
More preferably, it is set higher by 0.4 V.

【０００７】請求項４記載の発明は、充電後期、または
全期間を定電圧で充電する非水系二次電池の充電装置に
おいて、前記非水系二次電池を充電する充電手段を備
え、該充電手段は前記非水系二次電池の満充電での開回
路電圧と前記定電圧として前記満充電での開回路電圧よ
り大きく、かつ該開回路電圧より０．４Ｖ高い電圧値以
下の範囲内の電圧で交互に充電するように構成されるも
のとした。なお前記定電圧を前記開回路電圧より０．２
〜０．４Ｖ高く設定するのがより好ましい。According to a fourth aspect of the present invention, there is provided a charging device for a non-aqueous secondary battery, which is charged at a constant voltage in the latter half of charging or in the entire charging period, comprising charging means for charging the non-aqueous secondary battery. Is a voltage within the range of an open circuit voltage at full charge of the non-aqueous secondary battery and a constant voltage which is higher than the open circuit voltage at full charge and 0.4 V higher than the open circuit voltage. It is configured to be charged alternately. It should be noted that the constant voltage is 0.2 than the open circuit voltage.
More preferably, it is set higher by 0.4 V.

【０００８】請求項５記載の発明は、充電後期、または
全期間を定電圧で充電する非水系二次電池の充電装置に
おいて、前記非水系二次電池を充電する充電手段を備
え、該充電手段は前記定電圧として前記非水系二次電池
の満充電での開回路電圧より大きく、かつ該開回路電圧
より０．４Ｖ高い電圧値以下の範囲内の電圧で充電し、
前記非水系二次電池の端子電圧を検出する電圧検出手段
と、前記非水系二次電池の充電電流を検出する電流検出
手段と、前記電圧検出手段の検出値により充電すべき充
電量を演算する演算手段と、前記電流検出手段の検出値
により充電された充電量を演算する充電量演算手段と、
前記充電された充電量が前記充電すべき充電量に達する
と充電を終了させる制御手段とを有するものとした。な
お前記定電圧を前記開回路電圧より０．２〜０．４Ｖ高
く設定するのがより好ましい。According to a fifth aspect of the present invention, there is provided a charging device for a non-aqueous secondary battery which charges a latter half of the charging or a whole period at a constant voltage, comprising a charging means for charging the non-aqueous secondary battery. Is charged as a constant voltage at a voltage within a range of a voltage value higher than the open circuit voltage at full charge of the non-aqueous secondary battery and 0.4 V higher than the open circuit voltage,
A voltage detection unit that detects the terminal voltage of the non-aqueous secondary battery, a current detection unit that detects the charging current of the non-aqueous secondary battery, and a charge amount to be charged by the detection value of the voltage detection unit are calculated. Calculation means, and a charge amount calculation means for calculating the charge amount charged by the detection value of the current detection means,
And a control unit that terminates charging when the charged amount reaches the charged amount to be charged. It is more preferable to set the constant voltage higher by 0.2 to 0.4 V than the open circuit voltage.

【０００９】請求項６記載の発明は、充電後期、または
全期間を定電圧で充電する非水系二次電池の充電装置に
おいて、前記非水系二次電池を充電する充電手段を備
え、該充電手段は前記非水系二次電池の満充電での開回
路電圧と前記定電圧として前記満充電での開回路電圧よ
り大きく、かつ該開回路電圧より０．４Ｖ高い電圧値以
下の範囲内の電圧で交互に充電し、前記非水系二次電池
の充電電流を検出する電流検出手段と、前記検出された
充電電流が０となるときに前記充電を終了させる制御手
段とを有するものとした。なお前記定電圧を前記開回路
電圧より０．２〜０．４Ｖ高く設定するのがより好まし
い。According to a sixth aspect of the present invention, there is provided a charging device for a non-aqueous secondary battery, which charges the latter half of the charging or a whole period at a constant voltage, comprising a charging means for charging the non-aqueous secondary battery. Is a voltage within the range of an open circuit voltage at full charge of the non-aqueous secondary battery and a constant voltage which is higher than the open circuit voltage at full charge and 0.4 V higher than the open circuit voltage. Current charging means for alternately charging and detecting the charging current of the non-aqueous secondary battery, and control means for terminating the charging when the detected charging current becomes zero are provided. It is more preferable to set the constant voltage higher by 0.2 to 0.4 V than the open circuit voltage.

【００１０】[0010]

【作用】請求項１記載の発明では、充電電圧は非水系二
次電池の満充電での開回路電圧より大きく、かつ該開回
路電圧より０．４Ｖ高い電圧値以下の範囲で設定される
から、前記非水系二次電池に損傷を与えずに大充電電流
を発生することができる。請求項３記載の発明では、充
電手段は非水系二次電池の満充電での開回路電圧より大
きく、かつ該開回路電圧より０．４Ｖ高い電圧値以下の
範囲内の電圧で該非水系二次電池を充電するように構成
されるから、充電中、前記非水系二次電池に損傷を与え
ずに大充電電流を流すことができる。According to the invention described in claim 1, the charging voltage is set to a range higher than the open circuit voltage at full charge of the non-aqueous secondary battery and not higher than 0.4 V higher than the open circuit voltage. A large charging current can be generated without damaging the non-aqueous secondary battery. In the invention according to claim 3, the charging means has a voltage within a range of a voltage value higher than the open circuit voltage at full charge of the non-aqueous secondary battery and 0.4 V higher than the open circuit voltage. Since the battery is configured to be charged, a large charging current can be applied during charging without damaging the non-aqueous secondary battery.

【００１１】請求項４記載の発明では、充電手段は非水
系二次電池の満充電での開回路電圧とそれより大きく、
かつ該開回路電圧より０．４Ｖ高い電圧値以下の範囲内
の電圧で交互に前記非水系二次電池を充電するように構
成されるから、充電中、前記非水系二次電池に前記両電
圧が交互に印加し、パルス状の充電電流を流すことがで
き、これにより、高充電電圧と大充電電流に保たれてい
る総時間が短くなり、前記二次非水系電池のサイクル寿
命が延びるとともに大充電電流を流すことができる。According to another aspect of the invention, the charging means has an open circuit voltage at a full charge of the non-aqueous secondary battery and a voltage higher than that.
Further, since the non-aqueous secondary battery is configured to be charged alternately with a voltage within a range of a voltage value 0.4 V higher than the open circuit voltage, both voltages are applied to the non-aqueous secondary battery during charging. Can be applied alternately and a pulsed charging current can be flowed, which shortens the total time kept at a high charging voltage and a large charging current, and extends the cycle life of the secondary non-aqueous battery. A large charging current can be passed.

【００１２】請求項５記載の発明では、非水系二次電池
を充電する際に、電圧検出手段は該非水系二次電池の端
子電圧を検出し、演算手段はその検出値に基づいて充電
すべき充電量を演算し、制御手段はその演算値に基づい
て充電手段を制御し、充電するときには、充電手段は非
水系二次電池の満充電での開回路電圧より大きく、かつ
該開回路電圧より０．４Ｖ高い電圧値以下の範囲内の電
圧で充電し、電流検出手段は充電電流を検出し、充電量
演算手段はその検出値に基づいて充電量を演算し、その
演算値と前記充電すべき充電量の演算値とが等しくなる
と、前記制御手段は充電を終了させるように作用する。
これにより、大電流、しかも必要な充電量だけを充電す
ることができる。According to the fifth aspect of the invention, when the non-aqueous secondary battery is charged, the voltage detecting means detects the terminal voltage of the non-aqueous secondary battery, and the arithmetic means should be charged based on the detected value. The charge amount is calculated, the control unit controls the charge unit based on the calculated value, and when charging, the charge unit is larger than the open circuit voltage at the full charge of the non-aqueous secondary battery, and more than the open circuit voltage. The battery is charged with a voltage within a range of 0.4 V higher than the voltage value, the current detection means detects the charging current, the charge amount calculation means calculates the charge amount based on the detected value, and the calculated value and the charge are charged. When the calculated value of the expected charge amount becomes equal, the control means acts to terminate the charge.
As a result, it is possible to charge a large amount of current and only a required amount of charge.

【００１３】請求項６記載の発明では、充電手段は非水
系二次電池の満充電での開回路電圧とそれより大きく、
かつ該開回路電圧より０．４Ｖ高い電圧値以下の範囲内
の電圧で交互に前記非水系二次電池を充電し、電流検出
手段はその充電電流を検出し、その検出値が０となった
ときに制御手段が作動し充電を終了させるように作用す
る。これにより、満充電の判定が簡単にでき、前記二次
非水系電池のサイクル寿命が延びるとともに大電流、し
かも必要な充電量だけを充電することができる。In the invention according to claim 6, the charging means has an open circuit voltage at a full charge of the non-aqueous secondary battery and a voltage higher than that.
Further, the non-aqueous secondary battery is alternately charged with a voltage within a range of 0.4 V higher than the open circuit voltage, and the current detecting means detects the charging current, and the detected value becomes 0. Sometimes the control means act to act to terminate charging. As a result, it is possible to easily determine whether the battery is fully charged, the cycle life of the secondary non-aqueous battery is extended, and it is possible to charge only a large current and a required amount of charge.

【００１４】[0014]

【実施例】図１は、本発明の第１の実施例を示す。 充
電装置１は、電圧検出部３と、演算部４と、制御部５
と、充電部８と、電流検出部６と、演算部７からなって
いる。電圧検出部３は出力端子Ａ、Ｂに接続され充電さ
れる電池２の端子電圧を検出する。演算部４は端子電圧
から電池２に充電すべき充電量を演算する。制御部５は
演算部４の演算値をもとに充電部８の充電開始を制御す
る。充電部８は定電圧で電池２を充電する。電流検出部
６は電池２の充電電流を検出する。演算部７は充電電流
から電池２への充電量を演算しこの演算値を制御部５に
戻すことによって充電を停止するよう働く。FIG. 1 shows a first embodiment of the present invention. The charging device 1 includes a voltage detection unit 3, a calculation unit 4, and a control unit 5.
And a charging unit 8, a current detection unit 6, and a calculation unit 7. The voltage detection unit 3 detects the terminal voltage of the battery 2 connected to the output terminals A and B and charged. The calculation unit 4 calculates the charge amount to charge the battery 2 from the terminal voltage. The control unit 5 controls the charging start of the charging unit 8 based on the calculation value of the calculation unit 4. The charging unit 8 charges the battery 2 with a constant voltage. The current detector 6 detects the charging current of the battery 2. The calculation unit 7 calculates the amount of charge to the battery 2 from the charging current and returns the calculated value to the control unit 5 to stop the charging.

【００１５】電池２は前述した非水系二次電池で、正極
にＬｉＣｏＯ２、負極にカーボンを用いたリチウムイオ
ン電池を用いる。その満充電での開回路電圧が４．２Ｖ
である。充電部８は電池２の満充電での開回路電圧より
０．２Ｖ高い４．４Ｖで定電圧充電をするように設定さ
れている。Battery 2 is the non-aqueous secondary battery described above, and is a lithium ion battery using LiCoO 2 for the positive electrode and carbon for the negative electrode. The open circuit voltage at full charge is 4.2V
Is. The charging unit 8 is set to perform constant voltage charging at 4.4V, which is 0.2V higher than the open circuit voltage when the battery 2 is fully charged.

【００１６】上記の構成において、出力端子Ａ、Ｂに接
続された電池２への充電を開始すると、まず、電圧検出
部３は電池２の端子電圧を検出しその検出値が演算部４
に入力される。演算部４には図２に示すような電池の端
子電圧と満充電をするための必要な充電量の関係を記憶
させてあるので、電池２の端子電圧が入力されるとそれ
に対応する必要な充電量が読出され制御部５に出力され
る。制御部５は入力された充電量の算出値に応じて充電
が必要か否かを判定し、そして必要という判定結果が出
たときに充電指令を充電部８へ出力する。充電部８は充
電指令を受けると設定された４．４Ｖの充電電圧で電池
２を充電する。In the above configuration, when charging of the battery 2 connected to the output terminals A and B is started, first, the voltage detection unit 3 detects the terminal voltage of the battery 2 and the detected value is the calculation unit 4.
Entered in. Since the calculation unit 4 stores the relationship between the terminal voltage of the battery and the amount of charge required for full charge as shown in FIG. 2, when the terminal voltage of the battery 2 is input, it is necessary to correspond to it. The charge amount is read out and output to the control unit 5. The control unit 5 determines whether or not charging is necessary according to the input calculated value of the charging amount, and outputs a charging command to the charging unit 8 when a determination result that the charging is necessary is output. When receiving the charge command, the charging unit 8 charges the battery 2 with the set charging voltage of 4.4V.

【００１７】続いて、電流検出部６で検出された電池２
への充電電流は、演算部７に入力され、演算部７でその
検出値を時間に対して積分し充電量に演算され出力され
る。制御部５はその充電量の演算値と前記演算部４から
入力された必要な充電量とが等しくなると充電を停止す
る指令を出力する。充電部８は充電停止指令受けると充
電を停止する。Subsequently, the battery 2 detected by the current detector 6
The charging current is input to the arithmetic unit 7, and the arithmetic unit 7 integrates the detected value with respect to time to calculate and output the amount of charge. The control unit 5 outputs a command to stop charging when the calculated value of the charging amount and the required charging amount input from the calculating unit 4 become equal. The charging unit 8 stops charging when receiving the charging stop command.

【００１８】このようにして、電池２が充電される。充
電中における電池２の充電電流とその内部充電容量の変
化は図３で示されている。図によれば、ａ線のような標
準充電とされる４．２Ｖで充電するときの充電電流に対
し、ｂ線の本実施例である４．４Ｖで充電するときの充
電電流が終始大きくリードしている。それに伴なって、
ｄ線のように標準充電では満充電するのに６０分かかっ
ていたのに対して、本実施例ではＣ線のように２０分に
短縮される。そして、充電サイクル数が増加しても、電
池２のサイクル寿命は図４に示されるように標準充電で
ある１Ｃ定電流−４．２Ｖ定電圧で充電するときと同じ
程度のものである。これに対して、４．６Ｖで定電圧充
電したときは充電のサイクル数が増加していくにつれ容
量劣化が激しくなっていくことが分かる。In this way, the battery 2 is charged. Changes in the charging current of the battery 2 and its internal charging capacity during charging are shown in FIG. According to the figure, the charging current at the time of charging at 4.2 V, which is the standard charging like the line a, is larger than the charging current at the time of charging at 4.4 V according to the present embodiment of the line b. is doing. Along with that,
It takes 60 minutes to fully charge in the standard charging like the d line, but in the present embodiment, it is shortened to 20 minutes like the C line. Then, even if the number of charge cycles is increased, the cycle life of the battery 2 is about the same as when it is charged by the 1C constant current-4.2V constant voltage which is the standard charge as shown in FIG. On the other hand, it can be seen that when constant voltage charging is performed at 4.6 V, the capacity deterioration becomes more severe as the number of charging cycles increases.

【００１９】本実施例は以上のように構成され、電池２
を充電する際に、電池２の端子電圧から充電すべき充電
量を演算し演算値を制御部５に入力し、その充電電圧を
電池２の満充電での開回路電圧より０．２Ｖ高く設定
し、そして充電電流から積算して求めた充電量と充電す
べき充電量とが等しくなると充電を終了させるようにし
たから、大電流、しかも必要な充電量だけを充電し、電
池２を急速充電できるとともに劣化をさせない効果が得
られる。This embodiment is constructed as described above, and the battery 2
When charging the battery 2, the charge amount to be charged is calculated from the terminal voltage of the battery 2, the calculated value is input to the control unit 5, and the charging voltage is set to 0.2 V higher than the open circuit voltage when the battery 2 is fully charged. Then, when the amount of charge obtained by integrating from the charging current becomes equal to the amount of charge to be charged, the charging is terminated. Therefore, only a large amount of current and the required amount of charge are charged to rapidly charge the battery 2. It is possible to obtain the effect of not causing deterioration.

【００２０】図５は、本発明の第２の実施例を示す。
電池２は第１の実施例と同じ正極にＬｉＣｏＯ２、負極
にカーボンを用いたリチウムイオン電池を用いる。充電
装置１Ａは、電流検出部６Ａと、充電部８Ａと、制御部
５Ａとからなっている。充電部８Ａは電池２の満充電で
の開回路電圧４．２Ｖとそれより０．２Ｖ高い４．４Ｖ
電圧をデューティ比１：１で交互に発生し出力端子Ａ、
Ｂに接続され充電される電池２を充電する。電流検出部
６Ａは電池２の充電電流を検出する。制御部５Ａは充電
電流が０となるときに充電を終了させるよう充電部８Ａ
を制御する。FIG. 5 shows a second embodiment of the present invention.
As the battery 2, a lithium ion battery using LiCoO 2 for the positive electrode and carbon for the negative electrode is used as in the first embodiment. The charging device 1A includes a current detection unit 6A, a charging unit 8A, and a control unit 5A. The charging unit 8A has an open circuit voltage of 4.2V when the battery 2 is fully charged, and is 4.4V, which is 0.2V higher than the open circuit voltage.
Voltage is generated alternately at a duty ratio of 1: 1 and output terminal A,
The battery 2 connected to B and charged is charged. The current detector 6A detects the charging current of the battery 2. The control unit 5A causes the charging unit 8A to end the charging when the charging current becomes zero.
To control.

【００２１】充電を開始すると、充電部８Ａは図６のａ
線のようにデューテー比１：１で交互に定電圧で電池２
を充電する。このときの充電電流はｂ線のように充電時
間の増加と伴なって減少していく。その充電電流は常時
電流検出部６Ａによって監視される。電池２の充電容量
がｃ線で示されているように充電時間につれて増してい
く。やがて充電容量が満充電となると、電池２の端子電
圧と４．２Ｖの充電電圧が等しくなり、充電電流が０と
なる。これを受けて制御部５Ａが充電停止の指令を出力
し、充電部８Ａが満充電になった電池２への充電を停止
する。When the charging is started, the charging section 8A moves to a in FIG.
Batteries 2 at constant voltage alternately with a duty ratio of 1: 1 as shown in the line
To charge. The charging current at this time decreases as the charging time increases, as in line b. The charging current is constantly monitored by the current detector 6A. The charging capacity of the battery 2 increases with the charging time as indicated by the line c. When the charging capacity is fully charged, the terminal voltage of the battery 2 becomes equal to the charging voltage of 4.2V, and the charging current becomes 0. In response to this, the control unit 5A outputs a charging stop command, and the charging unit 8A stops charging the fully charged battery 2.

【００２２】本実施例は以上のように構成され、充電電
圧は電池２の満充電での開回路電圧とそれより０．２Ｖ
高い電圧を交互に定電圧充電するので、電池を終始高い
電圧で充電するときより、高電圧または大電流で充電す
る総時間が短くなる。そして充電終了を充電電流により
判定できることから正確にまた確実に充電を終了するこ
とが可能である。The present embodiment is constructed as described above, and the charging voltage is the open circuit voltage when the battery 2 is fully charged and 0.2V from the open circuit voltage.
Since high voltage is alternately charged at a constant voltage, the total time for charging a battery with a high voltage or a large current is shorter than when charging a battery with a high voltage all the time. Since the end of charging can be determined by the charging current, it is possible to end charging accurately and surely.

【００２３】[0023]

【発明の効果】以上の通り、本発明は、非水系二次電池
の充電電圧を該電池の満充電での開回路電圧より大き
く、かつ該開回路電圧より０．４Ｖ高い電圧値以下の範
囲に設定したから、前記非水系二次電池に損傷を与えず
に大充電電流を発生することができる。これにより、充
電時間が短縮され急速充電が可能となる。また非水系二
次電池の満充電での開回路電圧とそれより大きく、かつ
該開回路電圧より０．４Ｖ高い電圧値以下の範囲内の電
圧で交互に前記非水系二次電池を充電するようにしたと
きには、高充電電圧と大充電電流に保たれている総時間
が短くなる。これにより、前記二次非水系電池のサイク
ル寿命が延びるとともに大充電電流を流すことができ
る。急速充電が可能という効果が得られる。As described above, according to the present invention, the charging voltage of the non-aqueous secondary battery is higher than the open circuit voltage when the battery is fully charged, and is 0.4 V higher than the open circuit voltage. Since it is set to, a large charging current can be generated without damaging the non-aqueous secondary battery. As a result, the charging time is shortened and quick charging is possible. Further, the non-aqueous secondary battery may be charged alternately with an open circuit voltage when the non-aqueous secondary battery is fully charged and a voltage higher than the open circuit voltage and 0.4 V higher than the open circuit voltage. When set to, the total time kept at the high charging voltage and the large charging current becomes short. This extends the cycle life of the secondary non-aqueous battery and allows a large charging current to flow. The effect that quick charging is possible is obtained.

【００２４】さらに、非水系二次電池の電圧に基づいて
演算した充電すべき充電量と充電電流から積算して求め
た充電量とが等しくなると充電を終了させるようにする
と、必要な充電量だけを充電することができる。これに
より過充電を防止することができる。さらにまた、非水
系二次電池の満充電での開回路電圧とそれより大きく、
かつ該開回路電圧より０．４Ｖ高い電圧値以下の範囲内
の電圧で交互に前記非水系二次電池を充電するときに、
その充電電流を検出しそしてその検出値が０となったと
きに充電を終了させるようにすると、必要な充電量だけ
を充電することができ、しかも満充電の判定が簡単にで
きるとともにサイクル寿命が延びるという効果が得られ
る。なお上記何れの場合も、満充電での開回路電圧より
大きく、かつ該開回路電圧より０．４Ｖ高い電圧値以下
の範囲内とされる充電電圧はとくに０．２〜０．４Ｖ範
囲内に設定するとより好ましく本発明の効果より一層高
めることが可能である。Further, if the charging amount to be charged calculated based on the voltage of the non-aqueous secondary battery and the charging amount obtained by integrating from the charging current become equal, the charging is terminated so that only the required charging amount is reached. Can be charged. This can prevent overcharging. Furthermore, open circuit voltage at full charge of non-aqueous secondary battery and greater than that,
And when the non-aqueous secondary battery is charged alternately with a voltage within a range of 0.4 V higher than the open circuit voltage,
If the charging current is detected and the charging is terminated when the detected value becomes 0, only the required charging amount can be charged, and moreover the full charge can be easily determined and the cycle life can be shortened. The effect of extension is obtained. In any of the above cases, the charging voltage that is higher than the open circuit voltage at full charge and is 0.4 V or higher higher than the open circuit voltage is within a range of 0.2 to 0.4 V. By setting it, it is possible to more preferably enhance the effect of the present invention.

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

【図１】本発明の第１の実施例を示す図である。FIG. 1 is a diagram showing a first embodiment of the present invention.

【図２】電池の端子電圧と満充電をするために必要な充
電量の関係を示す図である。FIG. 2 is a diagram showing a relationship between a terminal voltage of a battery and a charge amount required for full charge.

【図３】充電電流と充電容量の変化を示す図である。FIG. 3 is a diagram showing changes in charging current and charging capacity.

【図４】電池のサイクル数と充電容量を示す図である。FIG. 4 is a diagram showing the number of cycles and charge capacity of a battery.

【図５】本発明の第２の実施例を示す図である。FIG. 5 is a diagram showing a second embodiment of the present invention.

【図６】充電電流と充電電圧および充電容量を示す図で
ある。FIG. 6 is a diagram showing a charging current, a charging voltage, and a charging capacity.

【符号の説明】[Explanation of symbols]

１、１Ａ 充電装置 ２ 電池 ３ 電圧検出部 ４、７ 演算部 ５、５Ａ 制御部 ６、６Ａ 電流検出部 ８、８Ａ 充電部 Ａ、Ｂ 出力端子 1, 1A Charging device 2 Battery 3 Voltage detection unit 4, 7 Calculation unit 5, 5A Control unit 6, 6A Current detection unit 8, 8A Charging unit A, B Output terminal

Claims (11)

【特許請求の範囲】[Claims] 【請求項１】 充電後期、または全期間を定電圧で充電
する非水系二次電池の充電方法において、前記定電圧値
が前記非水系二次電池の満充電での開回路電圧より大き
く、かつ該開回路電圧より０．４Ｖ高い電圧値以下の範
囲で設定されることを特徴とする二次電池の充電方法。1. A method for charging a non-aqueous secondary battery in which charging is performed at a constant voltage during the latter half of charging or during the entire period, wherein the constant voltage value is larger than an open circuit voltage of the non-aqueous secondary battery at full charge, and A method of charging a secondary battery, wherein the secondary battery is set within a voltage range of 0.4 V higher than the open circuit voltage. 【請求項２】 充電後期、または全期間を定電圧で充電
する非水系二次電池の充電方法において、前記定電圧値
が前記非水系二次電池の満充電での開回路電圧より０．
２〜０．４Ｖ高く設定されることを特徴とする二次電池
の充電方法。2. A method for charging a non-aqueous secondary battery, which is charged at a constant voltage during the latter half of charging or during the whole period, wherein the constant voltage value is less than an open circuit voltage of the non-aqueous secondary battery at full charge.
A method of charging a secondary battery, which is set to be higher by 2 to 0.4 V. 【請求項３】 充電後期、または全期間を定電圧で充電
する非水系二次電池の充電装置において、前記非水系二
次電池を充電する充電手段を備え、該充電手段は前記定
電圧として前記非水系二次電池の満充電での開回路電圧
より大きく、かつ該開回路電圧より０．４Ｖ高い電圧値
以下の範囲内の電圧で充電するように構成されることを
特徴とする二次電池の充電装置。3. A charging device for a non-aqueous secondary battery, which charges a latter half of charging or a whole period with a constant voltage, comprising charging means for charging the non-aqueous secondary battery, and the charging means uses the constant voltage as the constant voltage. A secondary battery configured to be charged at a voltage within a range of a voltage value higher than an open circuit voltage of the non-aqueous secondary battery when fully charged and 0.4 V higher than the open circuit voltage. Charging device. 【請求項４】 充電後期、または全期間を定電圧で充電
する非水系二次電池の充電装置において、前記非水系二
次電池を充電する充電手段を備え、該充電手段は前記非
水系二次電池の満充電での開回路電圧と前記定電圧とし
て前記満充電での開回路電圧より大きく、かつ該開回路
電圧より０．４Ｖ高い電圧値以下の範囲内の電圧で交互
に充電するように構成されることを特徴とする二次電池
の充電装置。4. A charging device for a non-aqueous secondary battery that charges a latter half of charging or a whole period at a constant voltage, comprising charging means for charging the non-aqueous secondary battery, and the charging means is the non-aqueous secondary battery. The battery is alternately charged with an open circuit voltage when the battery is fully charged and a constant voltage that is higher than the open circuit voltage when fully charged and 0.4 V higher than the open circuit voltage. A charging device for a secondary battery, which is configured. 【請求項５】 充電後期、または全期間を定電圧で充電
する非水系二次電池の充電装置において、前記非水系二
次電池を充電する充電手段を備え、該充電手段は前記定
電圧として前記非水系二次電池の満充電での開回路電圧
より大きく、かつ該開回路電圧より０．４Ｖ高い電圧値
以下の範囲内の電圧で充電し、前記非水系二次電池の端
子電圧を検出する電圧検出手段と、前記非水系二次電池
の充電電流を検出する電流検出手段と、前記電圧検出手
段の検出値により充電すべき充電量を演算する演算手段
と、前記電流検出手段の検出値により充電された充電量
を演算する充電量演算手段と、前記充電された充電量が
前記充電すべき充電量に達すると充電を終了させる制御
手段とを有することを特徴とする二次電池の充電装置。5. A charging device for a non-aqueous secondary battery, which charges a latter half of charging or a whole period with a constant voltage, comprising a charging means for charging the non-aqueous secondary battery, and the charging means uses the constant voltage as the constant voltage. The terminal voltage of the non-aqueous secondary battery is detected by charging the non-aqueous secondary battery with a voltage within a range of a voltage value higher than the open circuit voltage and 0.4 V higher than the open circuit voltage when fully charged. Voltage detection means, current detection means for detecting the charging current of the non-aqueous secondary battery, calculation means for calculating the charge amount to be charged by the detection value of the voltage detection means, and the detection value of the current detection means A charging device for a secondary battery, comprising: a charge amount calculation means for calculating the charged charge amount; and a control means for terminating the charge when the charged charge amount reaches the charge amount to be charged. . 【請求項６】 充電後期、または全期間を定電圧で充電
する非水系二次電池の充電装置において、前記非水系二
次電池を充電する充電手段を備え、該充電手段は前記非
水系二次電池の満充電での開回路電圧と前記定電圧とし
て前記満充電での開回路電圧より大きく、かつ該開回路
電圧より０．４Ｖ高い電圧値以下の範囲内の電圧で交互
に充電し、前記非水系二次電池の充電電流を検出する電
流検出手段と、前記検出された充電電流が０となるとき
に前記充電を終了させる制御手段とを有することを特徴
とする二次電池の充電装置。6. A charging device for a non-aqueous secondary battery that charges at a constant voltage during the latter half of charging or during the entire period, comprising a charging means for charging the non-aqueous secondary battery, the charging means comprising the non-aqueous secondary battery. The open circuit voltage when the battery is fully charged and the constant voltage are alternately charged at a voltage within a range of a voltage value higher than the open circuit voltage at the full charge and 0.4 V higher than the open circuit voltage, A charging device for a secondary battery, comprising: a current detection unit that detects a charging current of the non-aqueous secondary battery; and a control unit that terminates the charging when the detected charging current becomes zero. 【請求項７】 充電後期、または全期間を定電圧で充電
する非水系二次電池の充電装置において、前記非水系二
次電池を充電する充電手段を備え、該充電手段は前記定
電圧として前記非水系二次電池の満充電での開回路電圧
より０．２〜０．４Ｖ高い電圧で充電するように構成さ
れることを特徴とする二次電池の充電装置。7. A charging device for a non-aqueous secondary battery that charges a latter half of charging or a whole period at a constant voltage, comprising a charging means for charging the non-aqueous secondary battery, and the charging means uses the constant voltage as the constant voltage. A charging device for a secondary battery, which is configured to be charged at a voltage higher by 0.2 to 0.4 V than an open circuit voltage when the non-aqueous secondary battery is fully charged. 【請求項８】 充電後期、または全期間を定電圧で充電
する非水系二次電池の充電装置において、前記非水系二
次電池を充電する充電手段を備え、該充電手段は前記非
水系二次電池の満充電での開回路電圧と前記定電圧とし
て前記満充電での開回路電圧より０．２〜０．４Ｖ高い
電圧で交互に充電するように構成されることを特徴とす
る二次電池の充電装置。8. A charging device for a non-aqueous secondary battery that charges at a constant voltage during the latter half of charging or during the entire period, comprising a charging means for charging the non-aqueous secondary battery, the charging means comprising the non-aqueous secondary battery. A secondary battery, which is configured to be alternately charged with an open circuit voltage at full charge of the battery and a voltage higher than the open circuit voltage at full charge by 0.2 to 0.4 V as the constant voltage. Charging device. 【請求項９】 充電後期、または全期間を定電圧で充電
する非水系二次電池の充電装置において、前記非水系二
次電池を充電する充電手段を備え、該充電手段は前記定
電圧として前記非水系二次電池の満充電での開回路電圧
より０．２〜０．４Ｖ高い電圧で充電し、前記非水系二
次電池の端子電圧を検出する電圧検出手段と、前記非水
系二次電池の充電電流を検出する電流検出手段と、前記
電圧検出手段の検出値により充電すべき充電量を演算す
る演算手段と、前記電流検出手段の検出値により充電さ
れた充電量を演算する充電量演算手段と、前記充電され
た充電量が前記充電すべき充電量に達すると充電を終了
させる制御手段とを有することを特徴とする二次電池の
充電装置。9. A charging device for a non-aqueous secondary battery that charges a latter half of charging or a whole period at a constant voltage, comprising a charging means for charging the non-aqueous secondary battery, and the charging means uses the constant voltage as the constant voltage. Voltage detecting means for detecting a terminal voltage of the non-aqueous secondary battery by charging the non-aqueous secondary battery with a voltage higher by 0.2 to 0.4 V than an open circuit voltage when the non-aqueous secondary battery is fully charged, and the non-aqueous secondary battery. Current detecting means for detecting the charging current of the battery, a calculating means for calculating the amount of charge to be charged based on the detection value of the voltage detecting means, and a charge amount calculation for calculating the charged quantity of charge based on the detection value of the current detecting means. A charging device for a secondary battery, comprising: a charging unit and a control unit that terminates charging when the charged amount reaches the charging amount to be charged. 【請求項１０】 充電後期、または全期間を定電圧で充
電する非水系二次電池の充電装置において、前記非水系
二次電池を充電する充電手段を備え、該充電手段は前記
非水系二次電池の満充電での開回路電圧と前記定電圧と
して前記満充電での開回路電圧より０．２〜０．４Ｖ高
い電圧で交互に充電し、前記非水系二次電池の充電電流
を検出する電流検出手段と、前記検出された充電電流が
０となるときに前記充電を終了させる制御手段とを有す
ることを特徴とする二次電池の充電装置。10. A charging device for a non-aqueous secondary battery that charges at a constant voltage during the latter half of charging or during the entire period, comprising charging means for charging the non-aqueous secondary battery, and the charging means is the non-aqueous secondary battery. The open circuit voltage at full charge of the battery and the constant voltage are alternately charged at a voltage higher by 0.2 to 0.4 V than the open circuit voltage at full charge to detect the charging current of the non-aqueous secondary battery. A charging device for a secondary battery, comprising: a current detection means; and a control means that terminates the charging when the detected charging current becomes zero. 【請求項１１】 前記非水系二次電池が正極にＬｉＣｏ
Ｏ２を用いたリチウムイオン電池であって、前記定電圧
が前記リチウムイオン電池の満充電での開回路電圧４．
２Ｖより０．２Ｖ高い４．４Ｖであることを特徴とする
請求項３、５、７又は９記載の二次電池の充電装置。11. The non-aqueous secondary battery has LiCo as a positive electrode.
3. A lithium ion battery using O2, wherein the constant voltage is an open circuit voltage when the lithium ion battery is fully charged.
The charging device for a secondary battery according to claim 3, 5, 7, or 9, wherein the charging voltage is 4.4V, which is higher than 2V by 0.2V.
JP6152613A 1994-06-10 1994-06-10 Method and device for charging secondary battery Withdrawn JPH07335265A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6152613A JPH07335265A (en) 1994-06-10 1994-06-10 Method and device for charging secondary battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6152613A JPH07335265A (en) 1994-06-10 1994-06-10 Method and device for charging secondary battery

Publications (1)

Publication Number Publication Date
JPH07335265A true JPH07335265A (en) 1995-12-22

Family

ID=15544220

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6152613A Withdrawn JPH07335265A (en) 1994-06-10 1994-06-10 Method and device for charging secondary battery

Country Status (1)

Country Link
JP (1) JPH07335265A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002135990A (en) * 2000-10-19 2002-05-10 Sony Corp Method and device to charge secondary lithium ion battery
WO2004001890A1 (en) * 2002-06-20 2003-12-31 The New Industry Research Organization Charging method and charging apparatus for secondary battery
JP2011015556A (en) * 2009-07-02 2011-01-20 Techno Core International Kk Device and method for charging secondary battery
JP2015018707A (en) * 2013-07-11 2015-01-29 日本電気株式会社 Charging method for lithium secondary battery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002135990A (en) * 2000-10-19 2002-05-10 Sony Corp Method and device to charge secondary lithium ion battery
WO2004001890A1 (en) * 2002-06-20 2003-12-31 The New Industry Research Organization Charging method and charging apparatus for secondary battery
JP2011015556A (en) * 2009-07-02 2011-01-20 Techno Core International Kk Device and method for charging secondary battery
JP2015018707A (en) * 2013-07-11 2015-01-29 日本電気株式会社 Charging method for lithium secondary battery

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