JPH09243717A - Method of detecting residual capacity of battery, and device therefor - Google Patents
Method of detecting residual capacity of battery, and device thereforInfo
- Publication number
- JPH09243717A JPH09243717A JP8047314A JP4731496A JPH09243717A JP H09243717 A JPH09243717 A JP H09243717A JP 8047314 A JP8047314 A JP 8047314A JP 4731496 A JP4731496 A JP 4731496A JP H09243717 A JPH09243717 A JP H09243717A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- open circuit
- circuit voltage
- discharge
- remaining capacity
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電池の残存容量を検
出する方法およびそれを実施する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the remaining capacity of a battery and an apparatus for implementing the method.
【０００２】[0002]
【従来の技術】従来の電池の残存容量の検出方法とし
て、例えば、特開平６‐１７４８０８号公報で提案され
ているバッテリの残容量検出方法がある。この方法は、
電池の端子電圧および放電電流に基づいて、電池の最大
出力密度と放電電力量との関係を順次算出し、その結果
に基づいて将来の最大出力密度と放電電力量との関係を
１次以上の回帰により推定し、この推定した最大出力密
度と放電電力量との特性曲線が放電終止時の最大出力密
度と交わる時の放電電力量から、現在の放電電力量を減
算することにより、電池の残存容量を算出する方法であ
る。しかしながら、上記した従来の残存容量検出方法に
おいては、電池の端子電圧および放電電流に基づいて、
電池の最大出力密度と放電電力量との関係を順次算出
し、その結果に基づいて将来の最大出力密度と放電電力
量との関係を推定する方法としているので、いったん放
電を休止したりすると放電条件が異なってきて、将来の
最大出力密度と放電電力量との関係を適確に推定するこ
とができなくなるという問題があった。2. Description of the Related Art As a conventional method for detecting the remaining capacity of a battery, there is, for example, a method for detecting the remaining capacity of a battery proposed in Japanese Patent Laid-Open No. 174808/1994. This method
Based on the terminal voltage and discharge current of the battery, the relationship between the maximum output density of the battery and the discharge power amount is sequentially calculated, and based on the result, the relationship between the future maximum output density and the discharge power amount of the primary or higher order is calculated. It is estimated by regression, and the current discharge power amount is subtracted from the discharge power amount when the characteristic curve of the estimated maximum power density and the discharge power amount intersects the maximum power density at the end of discharge, so that the battery life is reduced. This is a method of calculating the capacity. However, in the conventional remaining capacity detection method described above, based on the terminal voltage and the discharge current of the battery,
Since the relationship between the maximum output density of the battery and the discharge power amount is calculated sequentially and the relationship between the maximum output density and the discharge power amount in the future is estimated based on the result, the discharge will be stopped once the discharge is stopped. Since the conditions are different, there is a problem that the future relationship between the maximum output density and the discharge power amount cannot be accurately estimated.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来技術にお
いては、電池の最大出力密度と放電電力量との関係から
電池の残存容量を推定しているため、いったん放電を休
止すると放電条件が異なり、将来の最大出力密度と放電
電力量との関係を適確に推定することができなくなると
いう問題があった。In the above-mentioned prior art, since the remaining capacity of the battery is estimated from the relationship between the maximum output density of the battery and the amount of discharged electric power, once the discharge is stopped, the discharge conditions are different, There is a problem that it is not possible to accurately estimate the relationship between the maximum output density and the discharge power amount in the future.
【０００４】本発明の目的は、上記従来技術における問
題点を解消するものであって、電池の端子電圧と放電電
流から開放電圧を算出し、この開放電圧と放電容量との
相関関係より電池の残存容量を求める方式とするので、
電池の温度や放電条件が異なる場合であっても電池の残
存容量を適確に求めることができる電池の残存容量検出
方法およびそれを実施する装置を提供することにある。An object of the present invention is to solve the above problems in the prior art. The open circuit voltage is calculated from the terminal voltage of the battery and the discharge current, and the correlation between the open circuit voltage and the discharge capacity is used to determine the battery capacity. Since the method of obtaining the remaining capacity is used,
It is an object of the present invention to provide a method for detecting a remaining capacity of a battery and an apparatus for implementing the method, which can accurately determine the remaining capacity of the battery even when the temperature and the discharging condition of the battery are different.
【０００５】[0005]
【課題を解決するための手段】上記本発明の目的を達成
するために、本発明は特許請求の範囲に記載のような構
成とするものである。すなわち、本発明は請求項１に記
載のように、電池の端子電圧と放電電流から開放電圧と
電池の内部抵抗を算出し、上記開放電圧と内部抵抗より
放電終止時の開放電圧を算出するか、もしくは上記内部
抵抗より放電終止時の開放電圧を算出して、上記開放電
圧および放電終止時の開放電圧と放電容量との相関関係
から残存容量を求める電池の残存容量検出方法とするも
のである。また、本発明は請求項２に記載のように、請
求項１において、電池の端子電圧Ｖおよび放電電流Ｉか
らＶ−Ｉ特性を求め、該Ｖ−Ｉ特性より開放電圧Ｖ
0と、内部抵抗Ｒを算出し、上記開放電圧Ｖ0が所定値に
達している場合は、開放電圧Ｖ0が所定値に達した時の
内部抵抗Ｒより放電終止時の開放電圧Ｖ1を算出する
か、もしくは上記開放電圧Ｖ0が所定値に達しない場合
は、上記内部抵抗Ｒより放電終止時の開放電圧Ｖ1を算
出し、上記開放電圧Ｖ0および放電終止時の開放電圧Ｖ1
と放電容量との相関関係より残存容量を求める電池の残
存容量検出方法とするものである。また、本発明は請求
項３に記載のように、電池の端子電圧と放電電流から開
放電圧と電池の内部抵抗を算出し、上記開放電圧が所定
値に達している場合は最大出力密度を算出し、該最大出
力密度と放電終止時の最大出力密度より電池の残存容量
を求めるか、もしくは上記開放電圧が所定値に達しない
場合は、上記内部抵抗より放電終止時の開放電圧を算出
し、開放電圧および放電終止時時の開放電圧と放電容量
との相関関係より残存容量を求める電池の残存容量検出
方法とするものである。また、本発明は請求項４に記載
のように、請求項３において、電池の端子電圧Ｖおよび
放電電流ＩからＶ−Ｉ特性を求め、該Ｖ−Ｉ特性より開
放電圧Ｖ0と、内部抵抗Ｒを算出し、上記開放電圧Ｖ0が
所定値に達している場合は、上記Ｖ−Ｉ特性より最大出
力密度Ｐ0を算出し、該最大出力密度Ｐ0と放電終止時の
最大出力密度Ｐ1より電池の残存容量を求めるか、もし
くは上記開放電圧Ｖ0が所定値に達しない場合は、上記
内部抵抗Ｒより放電終止時の開放電圧Ｖ1を算出し、上
記開放電圧Ｖ0および放電終止時の開放電圧Ｖ1と放電容
量との相関関係より残存容量を求める電池の残存容量検
出方法とするものである。また、本発明は請求項５に記
載のように、電池の放電または充電電流値を検出する電
流検出手段と、電池の端子電圧を検出する電圧検出手段
と、上記電流検出手段および電圧検出手段の検出結果に
基づき電池の開放電圧を算出し、該開放電圧と電池の残
存容量についてあらかじめ定められた相関関係と、上記
算出した開放電圧とから、電池の残存容量を算出する演
算手段を少なくとも備えた電池の残存容量検出装置とす
るものである。また、本発明は請求項６に記載のよう
に、請求項５において、電流検出手段と電圧検出手段の
検出結果に基づき、電池の内部抵抗を算出する演算手段
と、該演算手段で求めた内部抵抗と放電終止時の開放電
圧についてあらかじめ定められた相関関係と、上記算出
した内部抵抗から、電池の放電終止時の開放電圧を算出
する演算手段とを少なくとも備えた電池の残存容量検出
装置とするものである。また、本発明は請求項７に記載
のように、請求項５において、算出した開放電圧が所定
の値に達するまでは、開放電圧の値より残存容量を算出
し、開放電圧が所定の値に達した後は、開放電圧が所定
の値に達した時点での内部抵抗の値を用いて放電終止時
の開放電圧を算出する演算手段とを少なくとも備えた電
池の残存容量検出装置とするものである。また、本発明
は請求項８に記載のように、請求項５において、算出し
た開放電圧が所定の値に達するまでは、開放電圧の値よ
り残存容量を算出し、開放電圧が所定の値に達した後
は、電流検出手段と電圧検出手段からの検出結果に基づ
き電池の最高出力密度を算出し、該電池の最高出力密度
と放電容量との関係より残存容量を求める電池の残存容
量検出装置とするものである。また、本発明は請求項９
に記載のように、請求項５ないし請求項８のいずれか１
項に記載の電池の残存容量検出装置において、演算手段
で求めた残存容量を表示する表示手段を備えた電池の残
存容量検出装置とするものである。また、本発明は請求
項１０に記載のように、請求項５ないし請求項９のいず
れか１項に記載の電池の残存容量検出装置において、非
水電解質系二次電池を使用した電池の残存容量検出装置
とするものである。また、本発明は請求項１１に記載の
ように、請求項５ないし請求項１０のいずれか１項に記
載の電池の残存容量検出装置において、電気自動車用組
電池の残存容量を検出する電池の残存容量検出装置とす
るものである。In order to achieve the above-mentioned object of the present invention, the present invention has a constitution as set forth in the claims. That is, according to the present invention, the open circuit voltage and the internal resistance of the battery are calculated from the terminal voltage of the battery and the discharge current, and the open circuit voltage at the end of discharge is calculated from the open circuit voltage and the internal resistance. Alternatively, it is a method for detecting the remaining capacity of a battery, in which the open circuit voltage at the end of discharge is calculated from the internal resistance, and the remaining capacity is obtained from the correlation between the open circuit voltage and the open circuit voltage at the end of discharge and the discharge capacity. . Further, according to the present invention, as described in claim 2, in claim 1, the VI characteristic is calculated from the terminal voltage V of the battery and the discharge current I, and the open circuit voltage V is calculated from the VI characteristic.
0 and calculates the internal resistance R, if the open circuit voltage V 0 reaches a predetermined value, the open-circuit voltage V 0 is the open circuit voltage V 1 of the time of discharge end than the internal resistance R when it reaches a predetermined value Calculated, or when the open circuit voltage V 0 does not reach a predetermined value, the open circuit voltage V 1 at the end of discharge is calculated from the internal resistance R, and the open circuit voltage V 0 and the open circuit voltage V 1 at the end of discharge are calculated.
This is a method for detecting the remaining capacity of the battery, which is used to determine the remaining capacity from the correlation between the discharge capacity and the discharge capacity. Further, according to the present invention, as described in claim 3, the open circuit voltage and the internal resistance of the battery are calculated from the terminal voltage of the battery and the discharge current, and the maximum power density is calculated when the open circuit voltage reaches a predetermined value. Then, obtain the remaining capacity of the battery from the maximum output density and the maximum output density at the end of discharge, or if the open circuit voltage does not reach a predetermined value, calculate the open circuit voltage at the end of discharge from the internal resistance, This is a method for detecting the remaining capacity of a battery, in which the remaining capacity is obtained from the correlation between the open circuit voltage and the open circuit voltage at the end of discharge and the discharge capacity. Further, according to the present invention, as in claim 4, in claim 3, the VI characteristic is obtained from the terminal voltage V of the battery and the discharge current I, and the open circuit voltage V 0 and the internal resistance are calculated from the VI characteristic. calculating the R, if the open circuit voltage V 0 reaches a predetermined value, the V-I characteristic calculates the maximum output density P 0 from, said maximum power density P 0 and the maximum power density P at the time of discharge termination If the remaining capacity of the battery is calculated from 1 , or if the open circuit voltage V 0 does not reach the predetermined value, the open circuit voltage V 1 at the end of discharge is calculated from the internal resistance R, and the open circuit voltage V 0 and the end of discharge are calculated. This is a method for detecting the remaining capacity of the battery, in which the remaining capacity is obtained from the correlation between the open circuit voltage V 1 and the discharge capacity at the time. According to a fifth aspect of the present invention, there are provided a current detecting means for detecting a discharge or charging current value of the battery, a voltage detecting means for detecting a terminal voltage of the battery, and the current detecting means and the voltage detecting means. An open circuit voltage of the battery is calculated based on the detection result, and at least a computing unit is provided for calculating the remaining battery capacity from the open circuit voltage and the predetermined correlation between the remaining battery capacity and the calculated open circuit voltage. This is used as a battery remaining capacity detection device. According to a sixth aspect of the present invention, in the fifth aspect, the calculating means for calculating the internal resistance of the battery based on the detection results of the current detecting means and the voltage detecting means, and the internal means obtained by the calculating means. A battery remaining capacity detection device comprising at least a predetermined correlation between resistance and open circuit voltage at the end of discharge and an arithmetic means for calculating the open circuit voltage at the end of discharge of the battery from the calculated internal resistance. It is a thing. Further, according to the present invention, as described in claim 7, in claim 5, until the calculated open circuit voltage reaches a predetermined value, the remaining capacity is calculated from the value of the open circuit voltage, and the open circuit voltage becomes a predetermined value. After reaching, the battery remaining capacity detection device is provided with at least an operation means for calculating the open circuit voltage at the end of discharge using the value of the internal resistance when the open circuit voltage reaches a predetermined value. is there. Further, according to the present invention, as described in claim 8, in claim 5, until the calculated open circuit voltage reaches a predetermined value, the remaining capacity is calculated from the value of the open circuit voltage, and the open circuit voltage becomes a predetermined value. After reaching, the maximum power density of the battery is calculated based on the detection results from the current detection means and the voltage detection means, and the remaining capacity detection device of the battery for determining the remaining capacity from the relationship between the maximum output density of the battery and the discharge capacity. It is what The present invention also provides claim 9.
As described in claim 1, any one of claims 5 to 8
In the battery remaining capacity detecting device described in the item 1, there is provided a battery remaining capacity detecting device including a display means for displaying the remaining capacity obtained by the calculating means. Further, according to the present invention, as in claim 10, in the battery residual capacity detecting device according to any one of claims 5 to 9, the battery remaining using a non-aqueous electrolyte secondary battery is used. This is a capacitance detection device. Further, according to the present invention, as described in claim 11, in the battery residual capacity detecting device according to any one of claims 5 to 10, there is provided a battery for detecting a residual capacity of an assembled battery for an electric vehicle. The remaining capacity detecting device is used.
【０００６】[0006]
【発明の効果】本発明は請求項１に記載のように、電池
の端子電圧と放電電流から開放電圧と電池の内部抵抗を
算出し、上記開放電圧と内部抵抗より放電終止時の開放
電圧を算出するか、もしくは上記内部抵抗より放電終止
時の開放電圧を算出して、上記開放電圧および放電終止
時の開放電圧と放電容量との相関関係から残存容量を求
める電池の残存容量検出方法とするものである。このよ
うに、電池の開放電圧より残存容量を算出する構成とし
ているので、電池の温度や放電休止条件等の環境条件が
異なっても、電池の端子電圧および放電電流を測定する
ことにより高精度に残存容量が求められる効果がある。
また、電池の内部抵抗は周囲温度により変化するもので
あり、本発明は内部抵抗から放電終止時の開放電圧を算
出しているため、電池の温度因子は上記内部抵抗に含ま
れているので、電池温度を計測しなくても精度の良い残
存容量を検出できる効果がある。また、本発明は請求項
２に記載のように、請求項１において、電池の端子電圧
Ｖおよび放電電流ＩからＶ−Ｉ特性を求め、該Ｖ−Ｉ特
性より開放電圧Ｖ0と、内部抵抗Ｒを算出し、上記開放
電圧Ｖ0が所定値に達している場合は、開放電圧Ｖ0が所
定値に達した時の内部抵抗Ｒより放電終止時時の開放電
圧Ｖ1を算出するか、もしくは上記開放電圧Ｖ0が所定値
に達しない場合は、上記内部抵抗Ｒより放電終止時の開
放電圧Ｖ1を算出し、上記開放電圧Ｖ0および放電終止時
の開放電圧Ｖ1と放電容量との相関関係より残存容量を
求める電池の残存容量検出方法とするものである。この
ような構成とすることにより、請求項１に記載の電池の
残存容量検出方法を確実に実施することができ、請求項
１と同様に、電池の温度や放電休止条件等の環境条件が
異なっても、電池の端子電圧および放電電流を測定する
ことにより、高精度に残存容量が求められる効果があ
る。また、本発明は請求項３に記載のように、電池の端
子電圧と放電電流から開放電圧と電池の内部抵抗を算出
し、上記開放電圧が所定値に達している場合は最大出力
密度を算出し、該最大出力密度と放電終止時の最大出力
密度より電池の残存容量を求めるか、もしくは上記開放
電圧が所定値に達しない場合は、上記内部抵抗より放電
終止時の開放電圧を算出し、開放電圧および放電終止時
の開放電圧と放電容量との相関関係より残存容量を求め
る電池の残存容量検出方法とするものである。このよう
な構成とすることにより、請求項１と同様に、電池の開
放電圧より残存容量を算出する構成としているので、電
池の温度や放電休止条件等の環境条件が異なっても、電
池の端子電圧および放電電流を測定することにより高精
度に残存容量が求められる効果がある。さらに、放電末
期に最大出力密度より残存容量を検出する構成としてい
るため、放電終止時をより適確に求めることができ、放
電末期には、より精度良く残存容量を検出できる効果が
ある。また、本発明は請求項４に記載のように、請求項
３において、電池の端子電圧Ｖおよび放電電流ＩからＶ
−Ｉ特性を求め、該Ｖ−Ｉ特性より開放電圧Ｖ0と、内
部抵抗Ｒを算出し、上記開放電圧Ｖ0が所定値に達して
いる場合は、上記Ｖ−Ｉ特性より最大出力密度Ｐ0を算
出し、該最大出力密度Ｐ0と放電終止時の最大出力密度
Ｐ1より電池の残存容量を求めるか、もしくは上記開放
電圧Ｖ0が所定値に達しない場合は、上記内部抵抗Ｒよ
り放電終止時の開放電圧Ｖ1を算出し、上記開放電圧Ｖ0
および放電終止時の開放電圧Ｖ1と放電容量との相関関
係より残存容量を求める電池の残存容量検出方法とする
ものである。このような構成とすることにより、請求項
３に記載の電池の残存容量検出方法を確実に実施するこ
とができ、請求項３と同様に、電池の温度や放電休止条
件等の環境条件が異なっても、電池の端子電圧および放
電電流を測定することにより、高精度に残存容量を求め
られる効果がある。また、本発明は請求項５に記載のよ
うに、電池の放電または充電電流値を検出する電流検出
手段と、電池の端子電圧を検出する電圧検出手段と、上
記電流検出手段および電圧検出手段の検出結果に基づき
電池の開放電圧を算出し、該開放電圧と電池の残存容量
についてあらかじめ定められた相関関係と、上記算出し
た開放電圧とから、電池の残存容量を算出する演算手段
を少なくとも備えた電池の残存容量検出装置とするもの
である。このような装置構成とすることにより、請求項
１ないし請求項４のいずれか１項に記載の電池の残存容
量検出方法を確実に実施することができ、請求項１ない
し請求項４のいずれか１項と同様に、電池の開放電圧よ
り残存容量を算出する構成としているので、電池の温度
や放電休止条件等の環境条件が異なっても、電池の端子
電圧および放電電流を測定することにより高精度に残存
容量が求められる効果がある。また、電池の内部抵抗は
周囲温度により変化するものであり、本発明は内部抵抗
から放電終止時の開放電圧を算出しているため電池の温
度の因子が含まれていることになり、電池温度を計測し
なくても精度の良い残存容量を検出できる効果がある。
さらに、放電末期に最大出力密度より残存容量を検出す
る構成としているため、放電終止時をより適確に求める
ことができ、放電末期には、より精度良く残存容量を検
出できる効果がある。また、本発明は請求項６に記載の
ように、請求項５において、電流検出手段と電圧検出手
段の検出結果に基づき、電池の内部抵抗を算出する演算
手段と、該演算手段で求めた内部抵抗と放電終止時の開
放電圧についてあらかじめ定められた相関関係と、上記
算出した内部抵抗から、電池の放電終止時の開放電圧を
算出する演算手段とを少なくとも備えた電池の残存容量
検出装置とするものである。このような構成とすること
により、電池温度を計測する必要がなく、内部抵抗（温
度因子が含まれる）の値から放電終止時の開放電圧を算
出することができ、請求項５の共通の効果に加えて、精
度良く、かつ容易に電池の残存容量を検出することがで
きる。また、本発明は請求項７に記載のように、請求項
５において、算出した開放電圧が所定の値に達するまで
は、開放電圧の値より残存容量を算出し、開放電圧が所
定の値に達した後は、開放電圧が所定の値に達した時点
での内部抵抗の値を用いて放電終止時の開放電圧を算出
する演算手段を少なくとも備えた電池の残存容量検出装
置とするものである。このように、開放電圧（Ｖ0）が
所定値、すなわち、それ以上放電すると（端子電圧が下
がると）電池の内部抵抗値が大きくなる所定の電圧値に
達するまでは（ステップＳ５の“ＮＯ”の場合）、Ｖ−
Ｉ特性より算出した内部抵抗より放電終止時の開放電圧
（Ｖ1）を算出して、電池の残存容量を求め、上記開放
電圧（Ｖ0）が所定値に達した場合（ステップＳ５の
“ＹＥＳ”の場合）には、その時の内部抵抗値から算出
した放電終止時の開放電圧（Ｖ1）を用いて、電池の残
存容量を求める構成としているので、放電終止時の開放
電圧（Ｖ1）を適確に算出することができ、請求項５の
共通の効果に加えて、精度の高い電池の残存容量が求め
られる効果がある。また、本発明は請求項８に記載のよ
うに、請求項５において、算出した開放電圧が所定の値
に達するまでは、開放電圧の値より残存容量を算出し、
開放電圧が所定の値に達した後は、電流検出手段と電圧
検出手段からの検出結果に基づき電池の最高出力密度を
算出し、該電池の最高出力密度と放電容量との関係より
残存容量を求める電池の残存容量検出装置とするもので
ある。このように、開放電圧（Ｖ0）が所定値に達する
までは、請求項７と同様にして、精度の高い電池の残存
容量を求めることができ、開放電圧（Ｖ0）が所定値に
達した場合には、最大出力密度（Ｐ0）を算出し、この
最大出力密度（Ｐ0）と、放電終止時の最大出力密度
（Ｐ1）から電池の残存容量を求める構成であるので、
請求項５の共通の効果に加えて、特に、放電末期におけ
る残存容量を、より精度良く求められる効果がある。ま
た、本発明は請求項９に記載のように、請求項５ないし
請求項８のいずれか１項に記載の電池の残存容量検出装
置において、演算手段で求めた残存容量を表示する表示
手段を備えた電池の残存容量検出装置とするものであ
る。このような構成とすることにより、請求項５の共通
の効果に加えて、電池の残存容量を容易に検知でき、電
池の使用状態を確認することができるので、電池の充電
または放電の時期を適確にキャッチできる効果がある。
また、本発明は請求項１０に記載のように、請求項５な
いし請求項９のいずれか１項に記載の電池の残存容量検
出装置において、非水電解質系二次電池を使用した電池
の残存容量検出装置とするものである。このような構成
とすることにより、充電可能な広範囲の非水電解質系二
次電池の残存容量検出装置に適用でき、広く活用できる
効果がある。また、本発明は請求項１１に記載のよう
に、請求項５ないし請求項１０のいずれか１項に記載の
電池の残存容量検出装置において、電気自動車用組電池
の残存容量を検出する電池の残存容量検出装置とするも
のである。このような構成とすることにより、電気自動
車用組電池の利用度合をいっそう向上できる効果があ
る。According to the present invention, as described in claim 1, the open circuit voltage and the internal resistance of the battery are calculated from the terminal voltage of the battery and the discharge current, and the open circuit voltage at the end of discharge is calculated from the open circuit voltage and the internal resistance. Calculated or the open circuit voltage at the end of discharge is calculated from the internal resistance, and the remaining capacity of the battery is obtained from the open circuit voltage and the correlation between the open circuit voltage at the end of discharge and the discharge capacity. It is a thing. In this way, since the remaining capacity is calculated from the open circuit voltage of the battery, even if the environmental conditions such as the battery temperature and the discharge stop condition are different, the terminal voltage and the discharge current of the battery can be measured with high accuracy. There is an effect that the remaining capacity is required.
Further, the internal resistance of the battery changes depending on the ambient temperature, and since the present invention calculates the open circuit voltage at the end of discharge from the internal resistance, the temperature factor of the battery is included in the internal resistance. There is an effect that it is possible to detect the remaining capacity with high accuracy without measuring the battery temperature. Further, according to the present invention, as described in claim 2, in claim 1, the VI characteristic is obtained from the terminal voltage V and the discharge current I of the battery, and the open circuit voltage V 0 and the internal resistance are calculated from the VI characteristic. calculating the R, the open circuit voltage V 0 is if you have reached the predetermined value, the open-circuit voltage V 0 is calculated open-circuit voltage V 1 of the time during discharge termination from the internal resistance R when it reaches a predetermined value or, Alternatively, when the open circuit voltage V 0 does not reach a predetermined value, the open circuit voltage V 1 at the end of discharge is calculated from the internal resistance R, and the open circuit voltage V 0 and the open circuit voltage V 1 at the end of discharge and the discharge capacity are calculated. This is a method for detecting the remaining capacity of the battery, which is used to obtain the remaining capacity from the correlation of With such a configuration, the method for detecting the remaining capacity of the battery according to claim 1 can be reliably carried out, and similar to claim 1, environmental conditions such as the temperature of the battery and the discharge suspension condition are different. However, by measuring the terminal voltage and the discharge current of the battery, there is an effect that the remaining capacity is required with high accuracy. Further, according to the present invention, as described in claim 3, the open circuit voltage and the internal resistance of the battery are calculated from the terminal voltage of the battery and the discharge current, and the maximum power density is calculated when the open circuit voltage reaches a predetermined value. Then, obtain the remaining capacity of the battery from the maximum output density and the maximum output density at the end of discharge, or if the open circuit voltage does not reach a predetermined value, calculate the open circuit voltage at the end of discharge from the internal resistance, This is a method for detecting the remaining capacity of a battery, in which the remaining capacity is obtained from the correlation between the open circuit voltage and the open circuit voltage at the end of discharge and the discharge capacity. With such a configuration, the remaining capacity is calculated from the open circuit voltage of the battery as in the case of claim 1, so that even if the environmental conditions such as the battery temperature and the discharge suspension condition are different, the battery terminal By measuring the voltage and the discharge current, there is an effect that the remaining capacity is required with high accuracy. Furthermore, since the remaining capacity is detected from the maximum output density at the end of discharge, the end of discharge can be more accurately obtained, and the remaining capacity can be detected more accurately at the end of discharge. Further, according to the present invention, as described in claim 4, in claim 3, the terminal voltage V of the battery and the discharge currents I to V
Seeking -I characteristics, with the V-I characteristic than the open voltage V 0, to calculate the internal resistance R, if the open circuit voltage V 0 reaches a predetermined value, the V-I characteristic than the maximum output power density P 0 is calculated and the remaining capacity of the battery is calculated from the maximum output density P 0 and the maximum output density P 1 at the end of discharge, or when the open circuit voltage V 0 does not reach a predetermined value, the internal resistance R is used. The open circuit voltage V 1 at the end of discharge is calculated, and the open circuit voltage V 0 is calculated.
And a method for detecting the remaining capacity of the battery, in which the remaining capacity is obtained from the correlation between the open circuit voltage V 1 at the end of discharge and the discharge capacity. With such a configuration, the method for detecting the remaining capacity of the battery according to claim 3 can be reliably performed, and the environmental conditions such as the temperature of the battery and the discharge suspension condition are different as in the case of claim 3. However, by measuring the terminal voltage and the discharge current of the battery, there is an effect that the remaining capacity can be obtained with high accuracy. According to a fifth aspect of the present invention, there are provided a current detecting means for detecting a discharge or charging current value of the battery, a voltage detecting means for detecting a terminal voltage of the battery, and the current detecting means and the voltage detecting means. An open circuit voltage of the battery is calculated based on the detection result, and at least a computing unit is provided for calculating the remaining battery capacity from the open circuit voltage and the predetermined correlation between the remaining battery capacity and the calculated open circuit voltage. This is used as a battery remaining capacity detection device. With such an apparatus configuration, the method for detecting the remaining capacity of the battery according to any one of claims 1 to 4 can be reliably implemented, and the method according to any one of claims 1 to 4 can be implemented. As in item 1, the remaining capacity is calculated from the open circuit voltage of the battery, so even if the environmental conditions such as the battery temperature and the discharge suspension condition are different, the high voltage can be obtained by measuring the terminal voltage and discharge current of the battery. The remaining capacity is required to be accurate. Further, the internal resistance of the battery changes depending on the ambient temperature, and since the present invention calculates the open circuit voltage at the end of discharge from the internal resistance, it means that the factor of the battery temperature is included. There is an effect that the remaining capacity can be detected with high accuracy without measuring.
Furthermore, since the remaining capacity is detected from the maximum output density at the end of discharge, the end of discharge can be more accurately obtained, and the remaining capacity can be detected more accurately at the end of discharge. According to a sixth aspect of the present invention, in the fifth aspect, the calculating means for calculating the internal resistance of the battery based on the detection results of the current detecting means and the voltage detecting means, and the internal means obtained by the calculating means. A battery remaining capacity detection device comprising at least a predetermined correlation between resistance and open circuit voltage at the end of discharge and an arithmetic means for calculating the open circuit voltage at the end of discharge of the battery from the calculated internal resistance. It is a thing. With such a configuration, it is not necessary to measure the battery temperature, and the open circuit voltage at the end of discharge can be calculated from the value of the internal resistance (including the temperature factor). In addition, the remaining capacity of the battery can be detected accurately and easily. Further, according to the present invention, as described in claim 7, in claim 5, until the calculated open circuit voltage reaches a predetermined value, the remaining capacity is calculated from the value of the open circuit voltage, and the open circuit voltage becomes a predetermined value. After reaching, the battery remaining capacity detecting device is provided with at least a calculating means for calculating the open circuit voltage at the end of discharge using the value of the internal resistance when the open circuit voltage reaches a predetermined value. . Thus, until the open-circuit voltage (V 0 ) reaches a predetermined value, that is, a predetermined voltage value at which the internal resistance value of the battery increases when the voltage is further discharged (the terminal voltage decreases) (“NO” in step S5). , V-
When the open circuit voltage (V 1 ) at the end of discharge is calculated from the internal resistance calculated from the I characteristic to obtain the remaining capacity of the battery, and when the open circuit voltage (V 0 ) reaches a predetermined value (“YES” in step S5). the "case), open circuit voltage at the time of discharge termination calculated from the internal resistance value at that time a (V 1) with, since a configuration for obtaining the remaining capacity of the battery, the open circuit voltage at the time of discharge termination (V 1) Can be calculated accurately, and in addition to the common effect of claim 5, there is an effect that a highly accurate remaining capacity of the battery is required. Further, according to the present invention, as described in claim 8, in claim 5, the remaining capacity is calculated from the value of the open circuit voltage until the calculated open circuit voltage reaches a predetermined value.
After the open circuit voltage reaches a predetermined value, the maximum output density of the battery is calculated based on the detection results from the current detection means and the voltage detection means, and the remaining capacity is calculated from the relationship between the maximum output density of the battery and the discharge capacity. This is a device for detecting the remaining capacity of the battery to be obtained. Thus, until the open circuit voltage (V 0 ) reaches the predetermined value, the remaining capacity of the battery can be obtained with high accuracy in the same manner as in claim 7, and the open circuit voltage (V 0 ) reaches the predetermined value. In this case, the maximum power density (P 0 ) is calculated, and the remaining capacity of the battery is obtained from this maximum power density (P 0 ) and the maximum power density (P 1 ) at the end of discharge.
In addition to the common effect of the fifth aspect, there is an effect that the remaining capacity particularly at the final stage of discharge can be obtained with higher accuracy. Further, according to the present invention, as described in claim 9, in the battery residual capacity detecting device according to any one of claims 5 to 8, there is provided display means for displaying the residual capacity obtained by the calculating means. The battery remaining capacity detecting device is provided. With such a configuration, in addition to the common effect of claim 5, the remaining capacity of the battery can be easily detected and the usage state of the battery can be confirmed. There is an effect that can be caught accurately.
Further, according to the present invention, as in claim 10, in the battery residual capacity detecting device according to any one of claims 5 to 9, the battery remaining using a non-aqueous electrolyte secondary battery is used. This is a capacitance detection device. With such a configuration, the present invention can be applied to a wide range of rechargeable non-aqueous electrolyte secondary battery remaining capacity detection devices and can be widely used. Further, according to the present invention, as described in claim 11, in the battery residual capacity detecting device according to any one of claims 5 to 10, there is provided a battery for detecting a residual capacity of an assembled battery for an electric vehicle. The remaining capacity detecting device is used. With such a configuration, there is an effect that the degree of utilization of the battery pack for electric vehicles can be further improved.
【０００７】[0007]
〈第１の実施の形態〉図１は、本実施の形態で例示する
電池の残存容量検出装置の構成の一例を示す模式図であ
る。図において、１は電池であり、例えば、リチウム二
次電池である。２は、電池１の充電電流および放電電流
をそれぞれ検出する電流検出手段、３は、電池１の端子
電圧を検出する電圧検出手段である。４は、演算手段
（詳細後述）であり、例えば、記憶装置を有するコンピ
ュータやアナログ回路等で構成されている。なお、電流
検出手段２および電圧検出手段３は、単に放電回路や充
電回路の電流や電圧を演算装置４に送る抵抗と結線から
なる回路で、演算手段４において入力した電流値、電圧
値を判断するように構成してもよい。また、５は、演算
手段４で求めた残存容量を表示する残存容量表示手段
（詳細後述）である。この他に、電池の残存容量の低下
を報知する残存容量低下報知手段を設ける構成にしても
よい。また、演算手段４で求めた残存容量の値は、残存
容量表示手段５で表示して乗員等に示す以外に、例え
ば、電気自動車の制御手段（図示せず）に送り、電池の
残存容量が低下した場合に駆動電力を制限したり、回生
充電量を増加させる等の制御手段に用いることも可能で
ある。図２は、演算手段４における処理内容を例示する
フローチャートである。図において、まず、ステップＳ
１では、上記電流検出手段２で検出した電池の放電電流
Ｉおよび上記端子電圧検出手段３で検出した電池の端子
電圧Ｖが演算手段４に読み込まれる。これら放電電流Ｉ
および端子電圧Ｖは、電池の充放電中に所定の時間間隔
で継続的に検出され、演算手段４に順次蓄積される。放
電電流Ｉおよび端子電圧Ｖのサンプリング時間は、０.
０１秒から１０秒間隔で任意に選ぶことが可能であり、
また放電電流Ｉおよび端子電圧Ｖの値が変化した時のみ
測定することも可能である。続いて、ステップＳ２で、
蓄積された放電電流Ｉおよび端子電圧Ｖとを、演算手段
４で演算処理することにより、電池のＶ−Ｉ特性が求め
られる。放電電流Ｉおよび端子電圧Ｖのデータ数は、所
定の放電容量（数Ａｈ、または数Ｗｈ）ごとに演算す
る。図３に、電池のＶ−Ｉ特性を示す。図３においてプ
ロットされた複数個の点は、電流検出手段２で検出した
放電電流Ｉと端子電圧検出手段３で検出した端子電圧Ｖ
を示すものである。電池のＶ−Ｉ特性は、放電電流Ｉの
増加に伴って端子電圧Ｖが直線的に減少するものであ
る。続くステップＳ３では、電池の開放電圧ＶOが算出
される。電池の開放電圧ＶOは、Ｖ−Ｉ特性の電流値が
０での端子電圧の値である。続くステップＳ４では、電
池の内部抵抗Ｒが算出される。電池の内部抵抗Ｒは、Ｖ
−Ｉ特性の傾きの絶対値で表わされる。続くステップＳ
５では、開放電圧ＶOの値が所定値より高いか、あるい
は低いかを判断する。所定値とは、非水系電解液電池の
場合、それ以上放電して端子電圧Ｖが下がると内部抵抗
Ｒの値が大きくなる電圧値が選ばれる。ステップＳ５で
“ＮＯ”の場合は、ステップＳ７で放電終止時の開放電
圧Ｖ1が求められる。電動車両に搭載される電池の放電
終止は、電池の最大出力密度がモータの最大出力密度と
等しくなった時である。放電終止時の開放電圧Ｖ1は、
電池の内部抵抗Ｒによって変化するため、ステップＳ４
で求められた内部抵抗Ｒの値より算出される。図４に、
放電終止時の開放電圧（Ｖ）と内部抵抗Ｒ（Ω）との関
係を示す。電池の放電終止は、端子電圧が放電終止電圧
と一致した時であるから、内部抵抗が大きいほど開放電
圧の値も大きくなる。電池の端子電圧は、その時流れて
いる電流値と内部抵抗値を掛けた値を、開放電圧から引
いた値となる。ステップＳ５で“ＹＥＳ”の場合は、ス
テップＳ６に行き、開放電圧Ｖ0が所定値に達した時の
内部抵抗Ｒより算出した放電終止時の開放電圧Ｖ1をそ
のまま用いる。続くステップＳ８では、電池の開放電圧
Ｖ0、Ｖ1と放電容量との関係より残存容量Ｙが求められ
る。図５に、電池の開放電圧Ｖ0、Ｖ1と放電容量との関
係を示す。ステップＳ６またはステップＳ７で求められ
たＶ1より総放電容量を算出し、この総放電容量から現
在の開放電圧Ｖ0での放電容量を減算することにより、
残存容量Ｙが求められる。上述のようにして求められた
残存容量Ｙは、ステップＳ９で残存容量表示器により表
示される。このように、本発明の電池の残存容量検出方
法によれば、開放電圧Ｖ0、Ｖ1の値から残存容量Ｙを算
出する構成としているので、放電を休止して放電条件が
変わっても、端子電圧Ｖと放電電流Ｉを測定することに
より、これまでの放電容量が容易に算出でき、精度の良
い電池の残存容量Ｙが求められる。また、内部抵抗Ｒの
値から放電終止時の開放電圧Ｖ1を算出する構成とした
ことにより、電池温度を測定しなくても放電終止時の開
放電圧Ｖ1が算出でき、容易に残存容量Ｙが求められ
る。また、内部抵抗Ｒと放電終止時の開放電圧Ｖ1には
相関関係があり、容易に電池の残存容量Ｙを求めること
ができる。<First Embodiment> FIG. 1 is a schematic diagram showing an example of the configuration of a battery remaining capacity detection device exemplified in the present embodiment. In the figure, 1 is a battery, for example, a lithium secondary battery. Reference numeral 2 is a current detecting means for detecting the charging current and discharging current of the battery 1, and 3 is a voltage detecting means for detecting the terminal voltage of the battery 1. Reference numeral 4 denotes a computing unit (details will be described later), which is composed of, for example, a computer having a storage device or an analog circuit. The current detecting means 2 and the voltage detecting means 3 are circuits that are composed of resistors and wires that simply send the current and voltage of the discharge circuit and the charging circuit to the arithmetic unit 4, and judge the current value and voltage value input in the arithmetic unit 4. It may be configured to do so. Further, numeral 5 is a remaining capacity display means (details will be described later) for displaying the remaining capacity obtained by the calculation means 4. In addition to this, a configuration may be provided in which a remaining capacity decrease notifying means for notifying a decrease in the remaining capacity of the battery is provided. Further, the value of the remaining capacity obtained by the calculation means 4 is sent to, for example, the control means (not shown) of the electric vehicle, in addition to being displayed on the remaining capacity display means 5 and shown to the occupant, etc. It is also possible to use it as a control means such as limiting the drive power when the voltage drops, or increasing the regenerative charge amount. FIG. 2 is a flow chart exemplifying the processing contents of the calculating means 4. In the figure, first, step S
In 1, the battery discharging current I detected by the current detecting means 2 and the battery terminal voltage V detected by the terminal voltage detecting means 3 are read into the calculating means 4. These discharge currents I
The terminal voltage V and the terminal voltage V are continuously detected at a predetermined time interval during charging / discharging of the battery, and are sequentially accumulated in the calculating means 4. The sampling time of the discharge current I and the terminal voltage V is 0.
It is possible to arbitrarily select from 01 seconds to 10 seconds,
It is also possible to measure only when the values of the discharge current I and the terminal voltage V change. Then, in step S2,
By calculating the accumulated discharge current I and the terminal voltage V by the calculating means 4, the VI characteristic of the battery is obtained. The data numbers of the discharge current I and the terminal voltage V are calculated for each predetermined discharge capacity (several Ah or several Wh). FIG. 3 shows the VI characteristics of the battery. The plurality of points plotted in FIG. 3 are the discharge current I detected by the current detection means 2 and the terminal voltage V detected by the terminal voltage detection means 3.
It shows. The VI characteristic of the battery is such that the terminal voltage V linearly decreases as the discharge current I increases. In the following step S3, the open circuit voltage V O of the battery is calculated. The open circuit voltage V O of the battery is the value of the terminal voltage when the current value of the VI characteristic is 0. In the following step S4, the internal resistance R of the battery is calculated. The internal resistance R of the battery is V
It is represented by the absolute value of the slope of the −I characteristic. Subsequent step S
At 5, it is determined whether the value of the open circuit voltage V O is higher or lower than a predetermined value. In the case of a non-aqueous electrolyte battery, the predetermined value is selected as a voltage value at which the value of the internal resistance R increases as the terminal voltage V decreases due to further discharge. If "NO" in the step S5, the open circuit voltage V 1 at the end of discharge is obtained in a step S7. The end of discharge of the battery mounted on the electric vehicle is when the maximum power density of the battery becomes equal to the maximum power density of the motor. The open circuit voltage V 1 at the end of discharge is
Since it changes depending on the internal resistance R of the battery, step S4
It is calculated from the value of the internal resistance R obtained in. In FIG.
The relationship between the open circuit voltage (V) at the end of discharge and the internal resistance R (Ω) is shown. Since the end of discharge of the battery is when the terminal voltage matches the end of discharge voltage, the larger the internal resistance, the larger the open circuit voltage value. The terminal voltage of the battery is a value obtained by subtracting the value obtained by multiplying the current value flowing at that time by the internal resistance value from the open circuit voltage. If “YES” in the step S5, the process proceeds to a step S6, and the open circuit voltage V 1 at the end of discharge calculated from the internal resistance R when the open circuit voltage V 0 reaches a predetermined value is used as it is. In the following step S8, the remaining capacity Y is obtained from the relationship between the open-circuit voltages V 0 and V 1 of the battery and the discharge capacity. FIG. 5 shows the relationship between the open-circuit voltages V 0 and V 1 of the battery and the discharge capacity. By calculating the total discharge capacity from V 1 obtained in step S6 or step S7 and subtracting the discharge capacity at the present open circuit voltage V 0 from this total discharge capacity,
The remaining capacity Y is calculated. The remaining capacity Y obtained as described above is displayed by the remaining capacity indicator in step S9. As described above, according to the battery residual capacity detection method of the present invention, the residual capacity Y is calculated from the values of the open-circuit voltages V 0 and V 1. Therefore, even if the discharge is stopped and the discharge condition is changed, By measuring the terminal voltage V and the discharge current I, the discharge capacity up to now can be easily calculated, and the accurate remaining capacity Y of the battery can be obtained. Further, with the construction for calculating the open circuit voltage V 1 of the time of discharge end from the value of the internal resistance R, it can also calculate the open voltages V 1 during discharge termination without measuring the battery temperature, easily remaining capacity Y Is required. Further, there is a correlation between the internal resistance R and the open circuit voltage V 1 at the end of discharge, and the remaining capacity Y of the battery can be easily obtained.
【０００８】〈第２の実施の形態〉図６に、本実施の形
態で例示する電池の残存容量検出方法のフローチャート
を示す。図６において、ステップＳ１１〜ステップＳ１
５までは、上記第１の実施の形態の図２に示すステップ
Ｓ１〜Ｓ５と同様である。ステップＳ１５で、“ＮＯ”
の場合は、第１の実施の形態と同様である。ステップＳ
１５で、“ＹＥＳ”の場合は、ステップＳ１６で、Ｖ−
Ｉ特性から最大出力密度Ｐ0を算出する。最大出力密度
Ｐ0は、図３に示すＶ−Ｉ特性の斜線部の面積より求め
られる。続いてステップＳ１７では、開放電圧Ｖ0が所
定値に達した時の最高出力密度Ｐ0と、放電終止時の最
高出力密度Ｐ1の値より残存容量Ｙが求められる。放電
容量と、最高出力密度Ｐ0および放電終止時の最高出力
密度Ｐ1との間には相関関係があり、これを図７を示
す。放電容量と最高出力密度との関係は、内部抵抗Ｒの
値により変化するが、開放電圧の値が所定値に達したと
きの内部抵抗Ｒを測定しているので、あらかじめ内部抵
抗が変化したときの放電容量と最大出力密度の関係を記
憶させておくことにより、図７を求めることが可能であ
る。図７より、開放電圧Ｖ0が所定値に達した時の最高
出力密度Ｐ0および放電終止時の最高出力密度Ｐ1の値よ
り残存容量Ｙを求めることができる。そして、ステップ
Ｓ１５で、開放電圧Ｖ0が所定値に達しない場合は、ス
テップＳ１８で内部抵抗から放電終止時の開放電圧Ｖ1
を算出し、ステップＳ１９で開放電圧Ｖ0および放電終
止時の開放電圧Ｖ1と放電容量との相関関係より残存容
量Ｙを求めることができる。以上説明したように、本発
明の電池の残存容量検出方法によれば、その構成を電池
の開放電圧より残存容量を算出する構成としたため、放
電を休止し、放電条件が変化しても、電池の端子電圧お
よび放電電流を測定することにより、温度や放電休止条
件などの環境条件が異なっても適確な残存容量が求めら
れるという効果が得られる。また、第１の実施の形態に
おいて、上記した本発明の共通の効果に加えて、電池の
内部抵抗は温度によって変化することから、この内部抵
抗により放電終止時の開放電圧を算出することは温度因
子も含まれることになるので、電池の温度を測定しなく
ても精度の良い残存容量を検出できる効果がある。ま
た、第２の実施の形態においては、放電末期に最大出力
密度より残存容量を検出する構成としたため、第１の実
施の形態よりは、放電終止を正確に求めることができ、
放電末期には、より精度良く残存容量を検出できる効果
がある。<Second Embodiment> FIG. 6 shows a flowchart of a battery remaining capacity detecting method exemplified in the present embodiment. In FIG. 6, step S11 to step S1
Up to 5 is the same as steps S1 to S5 shown in FIG. 2 of the first embodiment. In step S15, "NO"
In the case of, the same as in the first embodiment. Step S
In the case of "YES" in step 15, in step S16, V-
The maximum output density P 0 is calculated from the I characteristic. The maximum output density P 0 is obtained from the area of the hatched portion of the VI characteristic shown in FIG. Then, in step S17, the remaining capacity Y is obtained from the maximum output density P 0 when the open circuit voltage V 0 reaches a predetermined value and the maximum output density P 1 at the end of discharge. There is a correlation between the discharge capacity and the maximum power density P 0 and the maximum power density P 1 at the end of discharge, which is shown in FIG. 7. The relationship between the discharge capacity and the maximum power density changes depending on the value of the internal resistance R, but since the internal resistance R is measured when the value of the open circuit voltage reaches a predetermined value, when the internal resistance changes in advance. It is possible to obtain FIG. 7 by storing the relationship between the discharge capacity and the maximum output density. From FIG. 7, the remaining capacity Y can be obtained from the maximum output density P 0 when the open circuit voltage V 0 reaches a predetermined value and the maximum output density P 1 at the end of discharge. If the open circuit voltage V 0 does not reach the predetermined value in step S15, the open circuit voltage V 1 at the end of discharge is determined from the internal resistance in step S18.
Then, in step S19, the remaining capacity Y can be obtained from the correlation between the open circuit voltage V 0 and the open circuit voltage V 1 at the end of discharge and the discharge capacity. As described above, according to the battery remaining capacity detection method of the present invention, since the configuration is such that the remaining capacity is calculated from the open circuit voltage of the battery, even if the discharge is stopped and the discharge condition changes, the battery By measuring the terminal voltage and the discharge current of, it is possible to obtain the effect that an appropriate remaining capacity is required even if the environmental conditions such as the temperature and the discharge resting condition are different. Further, in the first embodiment, in addition to the common effects of the present invention described above, the internal resistance of the battery changes depending on the temperature, so it is possible to calculate the open circuit voltage at the end of discharge by this internal resistance. Since the factor is also included, there is an effect that the remaining capacity can be detected with high accuracy without measuring the temperature of the battery. Further, in the second embodiment, since the remaining capacity is detected from the maximum power density at the final stage of discharge, the discharge end can be determined more accurately than in the first embodiment.
At the end of discharge, there is an effect that the remaining capacity can be detected more accurately.
【図１】本発明の第１の実施の形態で例示した電池の残
存容量検出装置の構成を示す説明図。FIG. 1 is an explanatory diagram showing a configuration of a battery remaining capacity detection device exemplified in a first embodiment of the present invention.
【図２】本発明の第１の実施の形態で例示した電池の残
存容量検出方法のフローチャート。FIG. 2 is a flowchart of a battery remaining capacity detection method exemplified in the first embodiment of the present invention.
【図３】本発明の第１の実施の形態で例示した電池の端
子電圧と放電電流の関係を示す図。FIG. 3 is a diagram showing the relationship between the terminal voltage and the discharge current of the battery exemplified in the first embodiment of the present invention.
【図４】本発明の第１の実施の形態で例示した電池の放
電終止時の開放電圧と内部抵抗の関係を示す図。FIG. 4 is a diagram showing a relationship between an open circuit voltage and an internal resistance at the end of discharge of the battery illustrated in the first embodiment of the present invention.
【図５】本発明の第１の実施の形態で例示した電池の開
放電圧と放電容量の関係を示す図。FIG. 5 is a diagram showing the relationship between the open circuit voltage and the discharge capacity of the battery exemplified in the first embodiment of the present invention.
【図６】本発明の第２の実施の形態で例示した電池の残
存容量検出方法のフローチャート。FIG. 6 is a flowchart of a method for detecting a remaining capacity of a battery illustrated in the second embodiment of the present invention.
【図７】本発明の第２の実施の形態で例示した電池の最
大出力密度と放電容量の関係を示す図。FIG. 7 is a diagram showing the relationship between the maximum output density and the discharge capacity of the battery exemplified in the second embodiment of the present invention.
１…電池（例えばリチウム二次電池） ２…充電電流および放電電流を検出する電流検出手段 ３…端子電圧を検出する電圧検出手段 ４…演算手段（例えば記憶装置を有するコンピュータま
たはアナログ回路） ５…電池の残存容量表示手段DESCRIPTION OF SYMBOLS 1 ... Battery (for example, lithium secondary battery) 2 ... Current detection means for detecting charge current and discharge current 3 ... Voltage detection means for detecting terminal voltage 4 ... Calculation means (for example, computer or analog circuit having storage device) 5 ... Battery residual capacity display means
Claims (11)
電池の内部抵抗を算出し、上記開放電圧と内部抵抗より
放電終止時の開放電圧を算出するか、もしくは上記内部
抵抗より放電終止時の開放電圧を算出して、上記開放電
圧および放電終止時の開放電圧と放電容量との相関関係
から電池の残存容量を求めることを特徴とする電池の残
存容量検出方法。1. An open circuit voltage and an internal resistance of the battery are calculated from the terminal voltage of the battery and a discharge current, and an open circuit voltage at the end of discharge is calculated from the open circuit voltage and the internal resistance. The remaining capacity of the battery is calculated by calculating the open circuit voltage of the above, and determining the remaining capacity of the battery from the correlation between the open circuit voltage and the open circuit voltage at the end of discharge and the discharge capacity.
び放電電流ＩからＶ−Ｉ特性を求め、該Ｖ−Ｉ特性より
開放電圧Ｖ0と、内部抵抗Ｒを算出し、上記開放電圧Ｖ0
が所定値に達している場合は、開放電圧Ｖ0が所定値に
達した時の内部抵抗Ｒより放電終止時時の開放電圧Ｖ1
を算出するか、もしくは上記開放電圧Ｖ0が所定値に達
しない場合は、上記内部抵抗Ｒより放電終止時の開放電
圧Ｖ1を算出し、上記開放電圧Ｖ0および放電終止時の開
放電圧Ｖ1と放電容量との相関関係より電池の残存容量
を求めることを特徴とする電池の残存容量検出方法。2. The open circuit voltage V 0 and the internal resistance R are calculated from the V-I characteristic by calculating the VI characteristic from the battery terminal voltage V and the discharge current I, and the open circuit voltage V is calculated. 0
Is a predetermined value, the open circuit voltage V 1 at the end of discharge is determined from the internal resistance R when the open circuit voltage V 0 reaches a predetermined value.
Or when the open circuit voltage V 0 does not reach a predetermined value, the open circuit voltage V 1 at the end of discharge is calculated from the internal resistance R, and the open circuit voltage V 0 and the open circuit voltage V at the end of discharge are calculated. A method for detecting the remaining capacity of a battery, which is characterized in that the remaining capacity of the battery is obtained from the correlation between 1 and the discharge capacity.
電池の内部抵抗を算出し、上記開放電圧が所定値に達し
ている場合は最大出力密度を算出し、該最大出力密度と
放電終止時の最大出力密度より電池の残存容量を求める
か、もしくは上記開放電圧が所定値に達しない場合は、
上記内部抵抗より放電終止時の開放電圧を算出し、開放
電圧および放電終止時の開放電圧と放電容量との相関関
係より電池の残存容量を求めることを特徴とする電池の
残存容量検出方法。3. The open circuit voltage and the internal resistance of the battery are calculated from the terminal voltage of the battery and the discharge current, and when the open circuit voltage reaches a predetermined value, the maximum output density is calculated, and the maximum output density and the end of discharge are calculated. If the remaining capacity of the battery is calculated from the maximum output density at that time, or if the above open circuit voltage does not reach the specified value,
A method for detecting a remaining capacity of a battery, which comprises calculating an open circuit voltage at the end of discharge from the internal resistance, and obtaining a remaining capacity of the battery from the correlation between the open circuit voltage and the open circuit voltage at the end of discharge and the discharge capacity.
び放電電流ＩからＶ−Ｉ特性を求め、該Ｖ−Ｉ特性より
開放電圧Ｖ0と、内部抵抗Ｒを算出し、上記開放電圧Ｖ0
が所定値に達している場合は、上記Ｖ−Ｉ特性より最大
出力密度Ｐ0を算出し、該最大出力密度Ｐ0と放電終止時
の最大出力密度Ｐ1より電池の残存容量を求めるか、も
しくは上記開放電圧Ｖ0が所定値に達しない場合は、上
記内部抵抗Ｒより放電終止時の開放電圧Ｖ1を算出し、
上記開放電圧Ｖ0および放電終止時の開放電圧Ｖ1と放電
容量との相関関係より電池の残存容量を求めることを特
徴とする電池の残存容量検出方法。4. The open circuit voltage V 0 and the internal resistance R are calculated from the V-I characteristic by calculating the VI characteristic from the battery terminal voltage V and the discharge current I, and the open circuit voltage V 0
Or If is has reached a predetermined value, calculates the maximum output density P 0 from the V-I characteristic, obtains the remaining capacity of the battery than the maximum power density P 1 at the time of discharge termination and said maximum output density P 0, Alternatively, when the open circuit voltage V 0 does not reach a predetermined value, the open circuit voltage V 1 at the end of discharge is calculated from the internal resistance R,
A method for detecting a remaining capacity of a battery, which is characterized in that the remaining capacity of the battery is obtained from the correlation between the open circuit voltage V 0 and the open circuit voltage V 1 at the end of discharge and the discharge capacity.
流検出手段と、電池の端子電圧を検出する電圧検出手段
と、上記電流検出手段および電圧検出手段の検出結果に
基づき電池の開放電圧を算出し、該開放電圧と電池の残
存容量についてあらかじめ定められた相関関係と、上記
算出した開放電圧とから、電池の残存容量を算出する演
算手段を少なくとも備えたことを特徴とする電池の残存
容量検出装置。5. A current detecting means for detecting a discharge or charging current value of the battery, a voltage detecting means for detecting a terminal voltage of the battery, and an open circuit voltage of the battery based on the detection results of the current detecting means and the voltage detecting means. The remaining capacity of the battery, including at least calculation means for calculating and calculating the remaining capacity of the battery from the calculated open circuit voltage and the predetermined correlation with respect to the remaining capacity of the battery and the calculated opening voltage. Detection device.
出手段の検出結果に基づき、電池の内部抵抗を算出する
演算手段と、該演算手段で求めた内部抵抗と放電終止時
の開放電圧についてあらかじめ定められた相関関係と、
上記算出した内部抵抗から、電池の放電終止時の開放電
圧を算出する演算手段とを少なくとも備えたことを特徴
とする電池の残存容量検出装置。6. The calculating means for calculating the internal resistance of a battery based on the detection results of the current detecting means and the voltage detecting means, the internal resistance obtained by the calculating means, and the open-circuit voltage at the end of discharge. A predetermined correlation,
A remaining capacity detecting device for a battery, comprising at least a calculating means for calculating an open circuit voltage at the end of discharge of the battery from the calculated internal resistance.
定の値に達するまでは、開放電圧の値より残存容量を算
出し、開放電圧が所定の値に達した後は、開放電圧が所
定の値に達した時点での内部抵抗の値を用いて放電終止
時の開放電圧を算出する演算手段を少なくとも備えたこ
とを特徴とする電池の残存容量検出装置。7. The method according to claim 5, wherein the remaining capacity is calculated from the value of the open circuit voltage until the calculated open circuit voltage reaches a predetermined value, and the open circuit voltage is set to a predetermined value after the open circuit voltage reaches the predetermined value. The remaining capacity detection device for a battery, comprising at least an arithmetic means for calculating an open circuit voltage at the end of discharge using the value of the internal resistance at the time when the value reaches.
定の値に達するまでは、開放電圧の値より残存容量を算
出し、開放電圧が所定の値に達した後は、電流検出手段
と電圧検出手段からの検出結果に基づき電池の最高出力
密度を算出し、該電池の最高出力密度と放電容量との関
係より残存容量を求めることを特徴とする電池の残存容
量検出装置。8. The method according to claim 5, wherein the remaining capacity is calculated from the value of the open circuit voltage until the calculated open circuit voltage reaches a predetermined value, and after the open circuit voltage reaches the predetermined value, the current detection means is operated. A battery remaining capacity detecting device, characterized in that the maximum power density of the battery is calculated based on the detection result from the voltage detecting means, and the remaining capacity is obtained from the relationship between the maximum output density of the battery and the discharge capacity.
記載の電池の残存容量検出装置において、演算手段で求
めた残存容量を表示する表示手段を備えたことを特徴と
する電池の残存容量検出装置。9. The battery remaining capacity detecting device according to claim 5, further comprising a display means for displaying the remaining capacity obtained by the computing means. Remaining capacity detection device.
に記載の電池の残存容量検出装置において、電池は非水
電解質系二次電池であることを特徴とする電池の残存容
量検出装置。10. The battery remaining capacity detecting device according to claim 5, wherein the battery is a non-aqueous electrolyte secondary battery. .
項に記載の電池の残存容量検出装置において、電池は電
気自動車用組電池であることを特徴とする電池の残存容
量検出装置。11. The method according to any one of claims 5 to 10.
The battery remaining capacity detection device according to the item 1, wherein the battery is an assembled battery for an electric vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04731496A JP3694959B2 (en) | 1996-03-05 | 1996-03-05 | Battery remaining capacity detection method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04731496A JP3694959B2 (en) | 1996-03-05 | 1996-03-05 | Battery remaining capacity detection method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09243717A true JPH09243717A (en) | 1997-09-19 |
| JP3694959B2 JP3694959B2 (en) | 2005-09-14 |
Family
ID=12771839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04731496A Expired - Lifetime JP3694959B2 (en) | 1996-03-05 | 1996-03-05 | Battery remaining capacity detection method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3694959B2 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11326472A (en) * | 1998-05-14 | 1999-11-26 | Nissan Motor Co Ltd | Residual capacity meter of battery |
| JP2001229981A (en) * | 1999-12-16 | 2001-08-24 | Daimlerchrysler Ag | Remaining electric charge of battery and method of monitoring power function |
| US6920404B2 (en) | 2000-09-28 | 2005-07-19 | Japan Storage Battery Co., Ltd. | Method of detecting residual capacity of secondary battery |
| JP2006220617A (en) * | 2005-02-14 | 2006-08-24 | Denso Corp | Internal state detection system for charge accumulating device for vehicle |
| JP2006220616A (en) * | 2005-02-14 | 2006-08-24 | Denso Corp | Internal state detection system for charge accumulating device for vehicle |
| JP2006226789A (en) * | 2005-02-16 | 2006-08-31 | Denso Corp | Full charge capacity arithmetic unit of accumulation of electricity system for vehicle |
| JP2009042091A (en) * | 2007-08-09 | 2009-02-26 | Nissan Motor Co Ltd | Electric vehicle system |
| JP2009070209A (en) * | 2007-09-14 | 2009-04-02 | Ricoh Co Ltd | Unit and method for power supply control, and image forming unit |
| KR100956172B1 (en) * | 2005-01-27 | 2010-05-06 | 파나소닉쿠 이브이에나지 가부시키가이샤 | Secondary cell charge/discharge electricity amount estimation method and device, secondary cell polarization voltage estimation method and device, and secondary cell remaining capacity estimation method and device |
| JP2010197395A (en) * | 1999-04-08 | 2010-09-09 | Koninkl Philips Electronics Nv | Method of and device for determining charge condition of battery |
| JP2011072157A (en) * | 2009-09-28 | 2011-04-07 | Nissan Motor Co Ltd | Capacity adjusting device for assembled battery |
| CN106093780A (en) * | 2016-05-31 | 2016-11-09 | 青岛海信移动通信技术股份有限公司 | A kind of terminal residual electricity determines method and terminal |
| CN113655399A (en) * | 2021-08-16 | 2021-11-16 | 国网湖南省电力有限公司 | Method and system for detecting power consumption service life of battery of intelligent sensing terminal |
| WO2022000999A1 (en) * | 2020-07-03 | 2022-01-06 | 歌尔股份有限公司 | Battery electric quantity compensation method and apparatus, device, and readable storage medium |
-
1996
- 1996-03-05 JP JP04731496A patent/JP3694959B2/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11326472A (en) * | 1998-05-14 | 1999-11-26 | Nissan Motor Co Ltd | Residual capacity meter of battery |
| JP2010197395A (en) * | 1999-04-08 | 2010-09-09 | Koninkl Philips Electronics Nv | Method of and device for determining charge condition of battery |
| JP2001229981A (en) * | 1999-12-16 | 2001-08-24 | Daimlerchrysler Ag | Remaining electric charge of battery and method of monitoring power function |
| US6920404B2 (en) | 2000-09-28 | 2005-07-19 | Japan Storage Battery Co., Ltd. | Method of detecting residual capacity of secondary battery |
| KR100956172B1 (en) * | 2005-01-27 | 2010-05-06 | 파나소닉쿠 이브이에나지 가부시키가이샤 | Secondary cell charge/discharge electricity amount estimation method and device, secondary cell polarization voltage estimation method and device, and secondary cell remaining capacity estimation method and device |
| JP2006220616A (en) * | 2005-02-14 | 2006-08-24 | Denso Corp | Internal state detection system for charge accumulating device for vehicle |
| JP2006220617A (en) * | 2005-02-14 | 2006-08-24 | Denso Corp | Internal state detection system for charge accumulating device for vehicle |
| JP4587299B2 (en) * | 2005-02-14 | 2010-11-24 | 株式会社デンソー | Internal state detection method for power storage device for vehicles |
| JP4609882B2 (en) * | 2005-02-14 | 2011-01-12 | 株式会社デンソー | Internal state detection method for power storage device for vehicles |
| JP2006226789A (en) * | 2005-02-16 | 2006-08-31 | Denso Corp | Full charge capacity arithmetic unit of accumulation of electricity system for vehicle |
| JP4609883B2 (en) * | 2005-02-16 | 2011-01-12 | 株式会社デンソー | Fully charged capacity calculation device for power storage device for vehicle |
| JP2009042091A (en) * | 2007-08-09 | 2009-02-26 | Nissan Motor Co Ltd | Electric vehicle system |
| JP2009070209A (en) * | 2007-09-14 | 2009-04-02 | Ricoh Co Ltd | Unit and method for power supply control, and image forming unit |
| JP2011072157A (en) * | 2009-09-28 | 2011-04-07 | Nissan Motor Co Ltd | Capacity adjusting device for assembled battery |
| CN106093780A (en) * | 2016-05-31 | 2016-11-09 | 青岛海信移动通信技术股份有限公司 | A kind of terminal residual electricity determines method and terminal |
| WO2022000999A1 (en) * | 2020-07-03 | 2022-01-06 | 歌尔股份有限公司 | Battery electric quantity compensation method and apparatus, device, and readable storage medium |
| CN113655399A (en) * | 2021-08-16 | 2021-11-16 | 国网湖南省电力有限公司 | Method and system for detecting power consumption service life of battery of intelligent sensing terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3694959B2 (en) | 2005-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6515453B2 (en) | Method of predicting the state of charge as well as the use time left of a rechargeable battery | |
| JP4597501B2 (en) | Method and apparatus for estimating remaining capacity of secondary battery | |
| EP1555537B1 (en) | Battery remaining capacity measuring apparatus | |
| JP5442583B2 (en) | State detection device for power supply and power supply device | |
| TWI381182B (en) | Apparatus and method for estimating state of health of battery based on battery voltage variation pattern | |
| US7723993B2 (en) | Electronic battery tester configured to predict a load test result based on open circuit voltage, temperature, cranking size rating, and a dynamic parameter | |
| JP3285720B2 (en) | Method and apparatus for detecting deterioration of assembled battery | |
| US20100036627A1 (en) | Apparatus and method for determination of the state-of-charge of a battery when the battery is not in equilibrium | |
| US8203305B1 (en) | Enhanced voltage-based fuel gauges and methods | |
| US20030173971A1 (en) | Electronic battery tester with battery failure temperature determination | |
| US20120271578A1 (en) | Battery management system | |
| US20060282226A1 (en) | Electronic battery tester with relative test output | |
| KR20150066464A (en) | Cell state calculation apparatus and cell state calculation method | |
| JP3694959B2 (en) | Battery remaining capacity detection method and apparatus | |
| JP3006298B2 (en) | Battery remaining capacity meter | |
| KR102572652B1 (en) | Method for estimating state of charge of battery | |
| JP2018013456A (en) | Battery state monitoring device, battery state monitoring system, battery state monitoring method and control program | |
| JP2006126172A (en) | State-detecting method of secondary battery, and state detector of secondary battery | |
| JP2000338201A (en) | Judging apparatus of life and residual capacity of combined battery | |
| JP3249788B2 (en) | Battery pack power supply | |
| JP2000137062A (en) | Method and device for detecting residual capacity of secondary battery | |
| JP2003068369A (en) | Detecting method of total capacity of secondary battery and detector of total capacity | |
| JP3868711B2 (en) | Secondary battery unit and measuring method of electric capacity in secondary battery unit | |
| JPH0843505A (en) | Device for measuring residual capacity of secondary battery | |
| JPH1138107A (en) | Method for estimating residual capacity of secondary battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20041129 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20041214 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050124 |
|
| 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: 20050607 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050620 |
|
| 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: 20090708 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100708 Year of fee payment: 5 |