JPH09107638A - Charging and controllng of secondary battery - Google Patents
Charging and controllng of secondary batteryInfo
- Publication number
- JPH09107638A JPH09107638A JP7263879A JP26387995A JPH09107638A JP H09107638 A JPH09107638 A JP H09107638A JP 7263879 A JP7263879 A JP 7263879A JP 26387995 A JP26387995 A JP 26387995A JP H09107638 A JPH09107638 A JP H09107638A
- Authority
- JP
- Japan
- Prior art keywords
- charging
- battery
- voltage value
- constant current
- battery temperature
- 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- Withdrawn
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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は二次電池の充電制御
方法に係り、さらに詳しくは定電流充電＋定電圧充電方
式の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charge control method for a secondary battery, and more particularly to an improvement of a constant current charge + constant voltage charge system.
【０００２】[0002]
【従来の技術】ニッケル−水素二次電池、ニッケル−カ
ドミウムあるいはリチウムイオン二次電池などに代表さ
れる二次電池は、充電による電力の貯蔵、この貯蔵した
電力を負荷の駆動源（放電）とする繰り返し動作が可能
な電源として、たとえば携帯用電話機や携帯型撮像機な
ど各種の機器システムに組み込まれたりして実用されて
いる。2. Description of the Related Art A secondary battery typified by a nickel-hydrogen secondary battery, a nickel-cadmium or a lithium ion secondary battery stores power by charging, and uses the stored power as a driving source (discharge) of a load. As a power supply capable of performing a repetitive operation, it has been put into practical use by being incorporated in various device systems such as a portable telephone and a portable image pickup device.
【０００３】ところで、二次電池はいずれの場合も、前
記したように充電および放電が主要な機能であり、また
効率および安全性の点から、充電の終止電圧、放電の終
止電圧をそれぞれ限界とし、この限界範囲内の電圧で充
電や放電を行っている。そして、二次電池の充電制御方
法として、定電流充電および定電圧充電を組み合わせた
方式が知られている。By the way, in any of the secondary batteries, charging and discharging are the main functions as described above, and from the viewpoint of efficiency and safety, the end voltage of charge and the end voltage of discharge are set as limits. , Charging and discharging are performed with a voltage within this limit range. Then, as a charging control method for the secondary battery, a method in which constant current charging and constant voltage charging are combined is known.
【０００４】この定電流充電＋定電圧充電方式では、図
３に模式的に示すごとく、定電流モードでの充電を終了
するための設定電池電圧値Ｖcvがあり、定電流モードで
充電を進めて電池電圧が上昇し、設定電池電圧値Ｖcvに
到達した後は、定電圧で充電を行う定電圧モードに切り
換えて所要の充電が行われる。この充電制御方法の場
合、設定電池電圧値Ｖcvが高いと定電流モードでの充電
が長時間継続するので、過充電状態となり、逆に、設定
電池電圧値Ｖcvが低いと十分な充電容量が得られないた
め、放電容量も低下する。こうした問題を踏まえて、通
常定電流モードで90％程度までの充電を行い、残りの10
％程度を定電圧モードで充電するように、設定電池電圧
値Ｖcvを設定している。なお、この設定電池電圧値Ｖcv
による充電容量の変化を（左右されるのを）防止するた
め、定電流，定電圧フィードバック制御することも知ら
れている。In this constant current charging + constant voltage charging method, as schematically shown in FIG. 3, there is a set battery voltage value V cv for ending the charging in the constant current mode, and the charging proceeds in the constant current mode. After the battery voltage rises and reaches the set battery voltage value V cv , the charging is performed by switching to the constant voltage mode in which charging is performed at a constant voltage. In the case of this charge control method, if the set battery voltage value V cv is high, the charging in the constant current mode continues for a long time, so an overcharge state occurs, and conversely, if the set battery voltage value V cv is low, a sufficient charge capacity is obtained. Therefore, the discharge capacity also decreases. Taking these problems into consideration, the battery is charged up to about 90% in normal constant current mode and the remaining 10
The set battery voltage value V cv is set so that about% is charged in the constant voltage mode. In addition, this set battery voltage value V cv
It is also known to perform constant current / constant voltage feedback control in order to prevent (depending on) the change of the charging capacity due to.
【０００５】[0005]
【発明が解決しようとする課題】定電流充電＋定電圧充
電方式では、設定電池電圧値Ｖcvが重要であり、正確な
設定も可能となっているが、実際上いろいろの問題があ
る。すなわち、充電される二次電池の電圧が充電電池の
温度によって変化し、前記図３に併せて示すごとく、電
池温度が低温（たとえば 0℃）のときでは電池電圧が高
く、設定電池電圧値Ｖcvに達するまでの定電流モードで
の充電時間が短縮して、たとえば60％程度しか充電でき
ず、残りの40％程度を定電圧モードで充電することにな
り、所要の充電時間が長くなるという問題がある。一
方、電池温度が高温（たとえば50℃）のときでは電池電
圧が低下するので、設定電池電圧値Ｖcvに達するまでの
定電流モードでの充電時間が長くなり、定電流モードで
過充電状態を発生する恐れがある。In the constant current charging + constant voltage charging method, the set battery voltage value V cv is important and accurate setting is possible, but there are various problems in practice. That is, the voltage of the secondary battery to be charged changes depending on the temperature of the charging battery, and as shown in FIG. 3 above, when the battery temperature is low (for example, 0 ° C.), the battery voltage is high and the set battery voltage value V The charging time in constant current mode until reaching cv is shortened, for example, only about 60% can be charged, and the remaining 40% is charged in constant voltage mode, which means that the required charging time will be long. There's a problem. On the other hand, when the battery temperature is high (for example, 50 ° C.), the battery voltage drops, so the charging time in the constant current mode until the set battery voltage value V cv is extended becomes longer, and the overcharge state is maintained in the constant current mode. It may occur.
【０００６】上記問題に対処して、充電開始時に被充電
電池の温度を検知し、表１に例示するように、そのとき
の電池温度に対応した設定電池電圧値Ｖcvを予め設定し
ておくことも知られている。To cope with the above problem, the temperature of the battery to be charged is detected at the start of charging, and a set battery voltage value V cv corresponding to the battery temperature at that time is preset as shown in Table 1. It is also known.
【０００７】表１ 被充電電池温度 設定電池電圧値Ｖcv 0〜19℃ 6.40Ｖ 20〜15℃ 6.36Ｖ 26〜35℃ 6.30Ｖ 36〜40℃ 6.26Ｖ しかしながら、被充電電池温度の温度ごとに設定電池電
圧値Ｖcvを設定した場合、なお次のような問題がある。
たとえばスキー場など気温が低い（たとえば 0℃）とこ
ろで使用されていた二次電池を、空調された暖かい室内
（たとえば26℃）に設置された充電器で充電する場合、
充電開始時の電池温度が低いため、設定電池電圧値Ｖcv
は6.40Ｖに設定される。つまり、設定されるべきであっ
た設定電池電圧値Ｖcvである6.30Ｖに対して 0.1Ｖ高く
誤って設定されるため、定電流モードでの充電時間が長
くなり、過充電状態を発生し易いという不都合がある。Table 1 Charged battery temperature setting battery voltage value V cv 0 to 19 ° C 6.40V 20 to 15 ° C 6.36V 26 to 35 ° C 6.30V 36 to 40 ° C 6.26V However, it is set for each temperature of the charged battery temperature. When the battery voltage value V cv is set, the following problems still occur.
For example, when charging a secondary battery that was used in a cold place (eg 0 ° C) such as a ski resort with a charger installed in a warm and air-conditioned room (eg 26 ° C),
Since the battery temperature at the start of charging is low, the set battery voltage value V cv
Is set to 6.40V. That is, the set battery voltage value V cv , which was supposed to be set to 6.30V, is set to 0.1V higher by mistake, so that the charging time in the constant current mode becomes longer and the overcharge state is likely to occur. There is an inconvenience.
【０００８】本発明は上記事情に対処してなされたもの
で、二次電池に対して、効率よく満充電状態の充電を達
成できる二次電池の充電制御方法を提供することを目的
とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a charge control method for a secondary battery, which can efficiently charge the secondary battery in a fully charged state.
【０００９】[0009]
【課題を解決するための手段】請求項１の発明は、二次
電池に設定電池電圧値まで定電流モードで充電した後、
定電圧モードに移行して充電する二次電池の充電方法で
あって、前記定電流モードでの充電過程における単位時
間当たりの電池温度変化（温度微分値）が所定の値以下
になった時点で、充電開始時に設定した設定電池電圧値
Ｖcvから、このときの電池温度を対象とした設定電池電
圧値Ｖcvに変更することを特徴とする二次電池の充電方
法である。According to a first aspect of the invention, after charging a secondary battery to a set battery voltage value in a constant current mode,
A method of charging a secondary battery that shifts to a constant voltage mode for charging, wherein the battery temperature change (temperature differential value) per unit time in the charging process in the constant current mode becomes a predetermined value or less. The charging method for a secondary battery is characterized in that the set battery voltage value V cv set at the start of charging is changed to the set battery voltage value V cv targeting the battery temperature at this time.
【００１０】すなわち、本発明の充電制御方法は、充電
開始時の電池温度の検知，この検知温度に対応した設定
電池電圧値Ｖcvを基準とする定電流充電＋定電圧充電方
式において、充電開始から一定の時間ごと（たとえば 1
分ごと）に電池温度を測定し、定電流モードの充電に伴
う電池温度変化dT／dt（温度勾配）の絶対値を目安とし
て、その絶対値が所定の値（たとえば 1.5℃／ 1分）以
下になった時点で、このときの電池温度に対応する（基
準的な）設定電池電圧値Ｖcvに変更することを骨子とし
ている。That is, the charging control method of the present invention detects the battery temperature at the start of charging and starts charging in the constant current charging + constant voltage charging system based on the set battery voltage value V cv corresponding to the detected temperature. From every fixed time (for example, 1
The battery temperature is measured every minute), and the absolute value of the battery temperature change dT / dt (temperature gradient) associated with charging in the constant current mode is used as a guideline, and the absolute value is less than or equal to a predetermined value (for example, 1.5 ° C / 1 minute). The main point is to change to the (standard) set battery voltage value V cv corresponding to the battery temperature at this time.
【００１１】なお、本発明においては、充電用の電力源
として、商用の交流電源を適切な電圧を持った直流に変
換したものが使用されるが、その他に、たとえば燃料電
池からなる電源を使用してもよいし、あるいはガソリン
エンジンないしはディーゼルエンジンなどから発電され
る電力を用いてもよい。In the present invention, as a power source for charging, a commercial AC power source converted into a direct current having an appropriate voltage is used. In addition, a power source including a fuel cell, for example, is used. Alternatively, electric power generated from a gasoline engine or a diesel engine may be used.
【００１２】本発明では、充電開始時の電池温度で設定
された設定電池電圧値Ｖcvを、定電流モードの充電に伴
う電池温度の変化が予め定めた一定の値以下に低減した
時点で、そのときの電池温度に基づいた基準的な設定電
池電圧値Ｖcvを変更するため、定常的な定電流モードで
充電が行われることになる。すなわち、未充電や過充電
の発生が防止されるので、所要の放電容量を容易に確保
できるだけでなく、過充電による電池寿命の劣化なども
回避できる。In the present invention, when the set battery voltage value V cv set by the battery temperature at the start of charging is reduced to a predetermined value or less due to the change in battery temperature due to charging in the constant current mode, Since the standard set battery voltage value V cv based on the battery temperature at that time is changed, charging is performed in the steady constant current mode. That is, since the occurrence of uncharging and overcharging is prevented, not only the required discharge capacity can be secured easily, but also the deterioration of battery life due to overcharging can be avoided.
【００１３】[0013]
【発明の実施の形態】以下図１および図２を参照して本
発明の実施の形態を説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.
【００１４】図１は、この発明の実施状態を模式的に、
また図２は実施操作をフローチャートでそれぞれ示した
ものである。FIG. 1 schematically shows an embodiment of the present invention.
In addition, FIG. 2 is a flowchart showing the operation performed.
【００１５】先ず、予め設定されている充電器に被充電
電池をセットして充電を開始する。ここで、充電器は充
電過程における被充電電池の温度検知や電池温度の変化
表示機構など備えており、被充電電池が使用されていた
ときの外界温度に応じて、上記表１に基づいた設定電池
電圧値Ｖcvを設定し、所要の定電流モードの充電を開始
する。たとえば、外界温度 5℃で使用していた電池を被
充電電池とした場合、充電開始時 T0 の電池温度は 5℃
であるので、設定電池電圧値Ｖcvを6.40Ｖに設定して、
所定の電流による定電流モード充電を開始する。この定
電流モード充電に伴って電池温度は上昇するので、たと
えば 0.5分ごとに電池温度を検知し、電池温度の変化dT
／dtを測定して、電池温度がたとえば26℃に到達した
後、電池温度の上昇割合（上昇勾配）が低減したとす
る。ここで、電池温度の上昇勾配が一定の値、たとえば
1.5℃／ 1分以下になった時点 T1 を目安として、その
ときの温度に基づいて、被充電電池に対する設定電池電
圧値Ｖcvを、26℃に対応する設定電池電圧値Ｖcv6.30Ｖ
に変更して、前記定電流モード充電を続行する。そし
て、定電流モード充電の続行によって、変更した設定電
池電圧値Ｖcvである6.30Ｖまで充電した後は、定電圧モ
ード充電を行うことによって所要の充電が達成される。
すなわち、対応する設定電池電圧値Ｖcvによって、定
電流モード充電から定電圧モード充電に切り換えて充電
を行う方式において、充電開始時に設定した設定電池電
圧値Ｖcvを定電流モード充電過程で見直し、適正な設定
電池電圧値Ｖcvに変更して、この変更した設定電池電圧
値Ｖcvに基づいて定電流モード充電から定電圧モード充
電に切り換えるため、未充電や過充電の発生が防止さ
れ、また、過充電に起因する電池寿命低下の恐れもなく
なり、効率よく、かつ信頼性の高い二次電池の充電を容
易に行うことができる。First, the battery to be charged is set in a preset charger and charging is started. Here, the charger is equipped with a mechanism for detecting the temperature of the battery to be charged during the charging process, a battery temperature change display mechanism, etc., and is set based on Table 1 above according to the ambient temperature when the battery to be charged is used. The battery voltage value V cv is set, and charging in the required constant current mode is started. For example, if the battery used at an ambient temperature of 5 ° C is used as the battery to be charged, the battery temperature at T 0 at the start of charging is 5 ° C.
Therefore, set the battery voltage value V cv to 6.40V,
Constant current mode charging with a predetermined current is started. Since the battery temperature rises with this constant current mode charging, the battery temperature is detected every 0.5 minutes, for example, and the battery temperature change dT
/ Dt is measured, and after the battery temperature reaches, for example, 26 ° C., it is assumed that the increasing rate (increasing slope) of the battery temperature decreases. Here, the rising gradient of the battery temperature is a constant value, for example,
As a guide to 1.5 ° C. / 1 min time point T 1 became less, based on the temperature at that time, the setting battery voltage value V cv respect to the rechargeable battery, corresponding to 26 ° C. setting the battery voltage value V cv 6.30V
Then, the constant current mode charging is continued. Then, by continuing the constant current mode charging, after charging to the changed set battery voltage value V cv of 6.30 V, the required charging is achieved by performing the constant voltage mode charging.
That is, the corresponding set battery voltage value V cv, the method of charging by switching from the constant current mode charging to the constant voltage mode charging, review the settings battery voltage value V cv set during start charging in constant current mode the charging process, By changing to an appropriate set battery voltage value V cv and switching from constant current mode charging to constant voltage mode charging based on this changed set battery voltage value V cv , the occurrence of uncharging or overcharging is prevented, and Also, there is no fear that the battery life will be shortened due to overcharge, and the secondary battery can be charged efficiently and with high reliability.
【００１６】なお、上記定電流モード充電を、定電流充
電の充電レートが高い急速充電で行うこともできる。す
なわち、充電開始時から電池温度の上昇勾配が所定値
（ 1.5℃／ 1分以下）になるまでは、急速充電時の 1／
10程度の低レートの定電流モード充電を行うと、充電に
伴う電池温度の上昇による電池温度検知に支障が及ばな
いので、上記と同様に効率よく、信頼性の高い二次電池
の充電を容易に行うことができる。The constant current mode charging can also be performed by rapid charging having a high charging rate for constant current charging. In other words, from the start of charging until the battery temperature rises to the specified value (1.5 ° C / 1 min or less),
If constant-current mode charging at a low rate of about 10 is performed, battery temperature detection will not be hindered by the increase in battery temperature accompanying charging, so charging of secondary batteries with the same efficiency and reliability as above is easy. Can be done.
【００１７】[0017]
【発明の効果】以上説明から分かるように、本発明によ
れば、被充電用の二次電池に対する定電流モード充電お
よび低電圧モード充電の実施において、被充電用二次電
池に対して、過充電など起こす恐れもなく、効率よく満
充電状態に近い充電を行うことができる。ここで、過充
電の発生が回避されることは二次電池の寿命，耐久性に
寄与し、また、効率よく満充電状態の充電をなし得るこ
とは電源としての信頼性向上に大きく寄与することにな
る。As can be seen from the above description, according to the present invention, when the secondary battery to be charged is subjected to constant current mode charging and low voltage mode charging, the secondary battery to be charged is overcharged. There is no fear of charging, and efficient charging close to full charge can be achieved. Here, avoiding the occurrence of overcharge contributes to the life and durability of the secondary battery, and being able to efficiently charge the battery in a fully charged state greatly contributes to the improvement of reliability as a power source. become.
【図１】実施例の実施態様を模式的に示す説明図。FIG. 1 is an explanatory view schematically showing an embodiment of an example.
【図２】実施例の実施手順を示すフローチャート図。FIG. 2 is a flowchart showing an implementation procedure of the embodiment.
【図３】定電流モード充電−低電圧モード充電の状態例
を模式的に示す説明図。FIG. 3 is an explanatory view schematically showing a state example of constant current mode charging-low voltage mode charging.
なし None
Claims (1)
ードで充電した後、定電圧モードに移行して充電する二
次電池の充電制御方法であって、 前記定電流モードでの充電過程における単位時間当たり
の電池温度変化（温度微分値）が所定の値以下になった
時点で、充電開始時に設定した設定電池電圧値から、こ
のときの電池温度を対象とした設定電池電圧値に変更す
ることを特徴とする二次電池の充電方法。1. A charging control method for a secondary battery, comprising charging a secondary battery in a constant current mode up to a set battery voltage value and then shifting to a constant voltage mode for charging, the charging process in the constant current mode. When the battery temperature change per unit time (temperature differential value) becomes less than a predetermined value, the set battery voltage value set at the start of charging is changed to the set battery voltage value targeted for the battery temperature at this time. A method of charging a secondary battery, comprising:
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7263879A JPH09107638A (en) | 1995-10-12 | 1995-10-12 | Charging and controllng of secondary battery |
| KR1019960045502A KR970024429A (en) | 1995-10-12 | 1996-10-12 | A control method for charging of secondary batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7263879A JPH09107638A (en) | 1995-10-12 | 1995-10-12 | Charging and controllng of secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09107638A true JPH09107638A (en) | 1997-04-22 |
Family
ID=17395516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7263879A Withdrawn JPH09107638A (en) | 1995-10-12 | 1995-10-12 | Charging and controllng of secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09107638A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2015064734A1 (en) * | 2013-11-01 | 2017-03-09 | 日本電気株式会社 | Charging device, power storage system, charging method and program |
-
1995
- 1995-10-12 JP JP7263879A patent/JPH09107638A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2015064734A1 (en) * | 2013-11-01 | 2017-03-09 | 日本電気株式会社 | Charging device, power storage system, charging method and program |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9263900B2 (en) | Battery pack including a battery management system configured to control charging and discharging thereof | |
| JP5638779B2 (en) | Secondary battery characteristic detection method and secondary battery device | |
| US20160294021A1 (en) | Charging apparatus, electricity storage system, charging method, and program | |
| JP2016028543A (en) | Power supply device | |
| KR101342602B1 (en) | Battery pack | |
| JPH077866A (en) | Circuit for charging secondary battery | |
| JP3311505B2 (en) | How to charge a battery pack containing multiple secondary batteries | |
| JP3306188B2 (en) | Rechargeable battery charging method | |
| US20100060241A1 (en) | Method and device for determining an equalizing charge of an accumulator | |
| JPH09107638A (en) | Charging and controllng of secondary battery | |
| JP2019154167A (en) | Charging system of electric vehicle | |
| JP3638369B2 (en) | Secondary battery charging control method | |
| JP3212800B2 (en) | In-vehicle charging device | |
| JP3390502B2 (en) | Rechargeable battery charging method | |
| JPH11150882A (en) | Method for charging battery | |
| JP4108822B2 (en) | Detachable battery pack and its charger | |
| JP3737150B2 (en) | Secondary battery charging control method | |
| JPWO2013008614A1 (en) | Storage battery management unit | |
| JP3555989B2 (en) | Rechargeable battery charging method | |
| JPH08298138A (en) | Charge control method for preventing overcharge | |
| JP2002010504A (en) | Power supply device for electric vehicle | |
| JPH1066278A (en) | Charging device | |
| JPH0935755A (en) | Charging method | |
| JPH0831459A (en) | Charging method for secondary battery | |
| JP3286357B2 (en) | Charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030107 |