JPH1020005A - Rechargeable battery capacity measurement method - Google Patents
Rechargeable battery capacity measurement methodInfo
- Publication number
- JPH1020005A JPH1020005A JP8178876A JP17887696A JPH1020005A JP H1020005 A JPH1020005 A JP H1020005A JP 8178876 A JP8178876 A JP 8178876A JP 17887696 A JP17887696 A JP 17887696A JP H1020005 A JPH1020005 A JP H1020005A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- capacity
- temperature
- discharge
- point
- 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.)
- Pending
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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
- Tests Of Electric Status Of Batteries (AREA)
- Secondary Cells (AREA)
Abstract
(57)【要約】
【課題】 電池温度もしくは環境温度により影響を受け
る二次電池の電池容量を、電池温度や環境温度に影響さ
れずに、複数の電池の容量を同じ尺度の下で比較できる
電池容量に補正する。
【解決手段】 所定の温度における電池容量を、２０℃
における電池容量に換算する補正係数を温度の関数と
し、放電開始時点より放電終了時点までの間に設定した
容量算出点における電池温度に対応する補正係数ｆ（Ｔ
ｉ）と、容量算出点までの放電容量ΔＣ’ｉとの積を補
正した放電容量ΔＣｉとすることにより、測定された電
池容量を一定の条件の下で補正し、電池温度に影響され
ることなく、複数の電池の容量を同じ尺度の下で比較可
能な電池容量とする。(57) [Summary] [PROBLEMS] To compare the battery capacity of a plurality of batteries under the same scale without being affected by the battery temperature or the environmental temperature, and by comparing the battery capacity of the secondary battery affected by the battery temperature or the environmental temperature. Correct to battery capacity. A battery capacity at a predetermined temperature is set to 20 ° C.
Is a function of temperature, and a correction coefficient f (T) corresponding to the battery temperature at the capacity calculation point set from the discharge start point to the discharge end point.
By determining the product of i) and the discharge capacity ΔC′i up to the capacity calculation point as a corrected discharge capacity ΔCi, the measured battery capacity is corrected under a certain condition, and is affected by the battery temperature. Instead, let the capacities of a plurality of batteries be comparable battery capacities under the same scale.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、二次電池の、特に
電池容量が電池温度，環境温度の影響を受け易い二次電
池の容量測定方法の技術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for measuring a capacity of a secondary battery, particularly a capacity of a secondary battery whose battery capacity is easily affected by battery temperature and environmental temperature.
【０００２】[0002]
【従来の技術】従来の二次電池の容量測定方法には、電
池を充電状態から放電状態まで一定の電流で放電し、そ
の放電時間を測定する方法や、一定時間の充電を行った
後、端子電圧を測定し、これを基準充電特性と比較する
ことで容量を算出する方法（例えば、特開平４−２９２
８７０号公報参照）などがある。2. Description of the Related Art Conventional methods for measuring the capacity of a secondary battery include a method in which a battery is discharged from a charged state to a discharged state at a constant current and the discharge time is measured. A method of measuring a terminal voltage and comparing it with a reference charging characteristic to calculate a capacity (for example, Japanese Patent Application Laid-Open No. 4-292
No. 870).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、電池容
量が電池温度に影響を受ける二次電池、例えばリチウム
イオン二次電池のような二次電池の場合には、同じ電池
でも容量測定時の環境温度により電池容量は異なった値
を示し、他の電池との容量比較が困難となり、品質安定
化に悪影響を及ぼすという問題点があった。さらに、こ
のような電池を用いて組電池を構成した場合には、電池
容量が異なる電池により組電池を構成することになるの
で、容量の小さい電池に律速されて組電池の特性が劣化
し、その能力を十分に発揮できなくなる危険性が生ずる
という問題点もあった。また、充放電時に発熱を伴うよ
うな二次電池、例えばリチウムイオン二次電池のような
電池の場合には、温度の影響がさらに大きく付加される
という問題点があった。However, in the case of a secondary battery whose battery capacity is affected by battery temperature, for example, a secondary battery such as a lithium ion secondary battery, the environmental temperature at the time of capacity measurement is the same even for the same battery. As a result, the battery capacity shows a different value, making it difficult to compare the capacity with other batteries, and has a problem that quality stability is adversely affected. Further, when an assembled battery is formed using such batteries, the assembled battery is constituted by batteries having different battery capacities. There is also a problem that there is a risk that the ability cannot be fully exhibited. In addition, in the case of a secondary battery that generates heat during charging and discharging, for example, a battery such as a lithium ion secondary battery, there is a problem that the influence of temperature is further increased.
【０００４】[0004]
【課題を解決するための手段】上記の問題点を解決する
ために、本発明は、二次電池の電池温度もしくは環境温
度と放電容量との関係を予め導き出し、所定の算出点に
おいて電池温度もしくは環境温度ならびに電池容量を測
定し、前記関係を用いて一定条件の下に電池容量の補正
を行うこととしている。In order to solve the above-mentioned problems, the present invention derives in advance the relationship between the battery temperature or environmental temperature of the secondary battery and the discharge capacity, and at a predetermined calculation point, the battery temperature or the temperature. The environmental temperature and the battery capacity are measured, and the battery capacity is corrected under certain conditions using the above relationship.
【０００５】そして、電池温度や環境温度に影響される
ことなく、複数の電池は同じ条件の下で比較可能な電池
容量を測定することができ、品質を安定させることがで
きる。A plurality of batteries can measure comparable battery capacities under the same conditions without being affected by battery temperature or environmental temperature, and can stabilize quality.
【０００６】[0006]
【発明の実施の形態】本発明は、電池温度もしくは環境
温度と放電容量との関係を予め導出し、所定の電池温度
もしくは環境温度で測定した電池容量を、前記で導出し
た関係を用いて補正することにより、複数の電池の電池
容量を同じ尺度で測定できるようにしたものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention derives in advance the relationship between battery temperature or environmental temperature and discharge capacity, and corrects the battery capacity measured at a predetermined battery temperature or environmental temperature using the relationship derived above. By doing so, the battery capacities of a plurality of batteries can be measured on the same scale.
【０００７】また、電池容量の補正は、放電終了時点、
もしくは放電開始時点より放電終了時点までの間の所定
の算出点において繰り返して行うのが効果的である。The battery capacity is corrected at the end of discharging,
Alternatively, it is effective to repeatedly perform the calculation at a predetermined calculation point between the discharge start point and the discharge end point.
【０００８】さらに、所定の温度における電池容量を２
０℃における電池容量に変換する係数を温度の関数とし
てその所定温度の補正係数とし、放電開始時点より放電
終了時点までの間に設定した容量算出点における電池温
度もしくは環境温度に対応する補正係数ｆ（Ｔｉ）と、
この容量算出点までの放電容量ΔＣ’ｉとの積を、補正
した電池容量ΔＣｉとすることもできる。Further, the battery capacity at a predetermined temperature is
A coefficient converted into a battery capacity at 0 ° C. is used as a function of temperature as a correction coefficient of the predetermined temperature, and a correction coefficient f corresponding to a battery temperature or an environmental temperature at a capacity calculation point set from a discharge start point to a discharge end point. (Ti),
The product with the discharge capacity ΔC′i up to this capacity calculation point may be used as the corrected battery capacity ΔCi.
【０００９】上記のように構成することにより、電池温
度もしくは環境温度の影響を受け易い電池容量を一定の
条件で補正することができ、電池温度もしくは環境温度
に影響されることなく、複数の電池の容量を同じ尺度の
下で比較できる電池容量として測定することができ、組
電池として安定した品質で高信頼性に組み立てられる二
次電池を提供できる。With the above configuration, the battery capacity that is easily affected by the battery temperature or the environmental temperature can be corrected under a certain condition, and the battery capacity can be corrected without being affected by the battery temperature or the environmental temperature. Can be measured as a battery capacity that can be compared on the same scale, and a secondary battery that can be assembled with stable quality and high reliability as an assembled battery can be provided.
【００１０】[0010]
【実施例】以下、本発明の実施例について、図１〜５を
参照して詳しく述べる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to FIGS.
【００１１】図１は、正極活物質としてＬｉＣｏＯ2、
負極活物質としてカーボンを使用した円筒形リチウムイ
オン二次電池の縦断面図を示し、図１において、１は耐
有機電解液性ステンレス鋼板を加工した電池ケース、２
は封口蓋、３は構成群で、ＬｉＣｏＯ2を活物質とする
正極板およびカーボンを活物質とする負極板がセパレー
ターを介して複数回渦巻状に巻回されたものである。４
は正極板から引き出されて封口蓋２に接続された正極リ
ード、５は負極板から引き出されて電池ケース１の内底
部に接続された負極リード、６は構成群３の上部絶縁
板、７は構成群３の下部絶縁板である。FIG. 1 shows LiCoO 2 as a positive electrode active material,
FIG. 1 is a longitudinal sectional view of a cylindrical lithium ion secondary battery using carbon as a negative electrode active material. In FIG. 1, reference numeral 1 denotes a battery case formed by processing an organic electrolyte resistant stainless steel sheet;
Is a sealing lid, and 3 is a structural group, in which a positive electrode plate using LiCoO 2 as an active material and a negative electrode plate using carbon as an active material are spirally wound a plurality of times via a separator. 4
Is a positive electrode lead pulled out of the positive electrode plate and connected to the sealing lid 2, 5 is a negative electrode lead pulled out of the negative electrode plate and connected to the inner bottom of the battery case 1, 6 is an upper insulating plate of the constituent group 3, and 7 is 13 is a lower insulating plate of the configuration group 3.
【００１２】上記円筒形リチウムイオン二次電池を用
い、電池容量の補正を以下の手順で行った。なお、ここ
ではＡサイズ（直径１７．０ｍｍ，長さ５０ｍｍ）の円
筒形リチウムイオン二次電池を用いた。Using the cylindrical lithium ion secondary battery, the battery capacity was corrected in the following procedure. Here, a cylindrical lithium ion secondary battery of A size (diameter 17.0 mm, length 50 mm) was used.
【００１３】まず、複数個の同種の二次電池について、
電池温度を変化させ、その電池容量を各温度毎に測定
し、その結果は図２のような関係を示した。次にこの関
係を用い、各温度における電池容量を２０℃における電
池容量に換算するための係数（以下補正係数と称する）
を求めると、この補正係数（ｆ（Ｔ））と温度（Ｔ）と
の関係は図３に示す通りである。なお、補正前の電池容
量（Ｃ’）と、補正後の電池容量（Ｃ）と、補正係数
（ｆ（Ｔ））との間には数１に示す関係式が成り立って
いる。First, a plurality of secondary batteries of the same type will be described.
The battery temperature was varied, and the battery capacity was measured at each temperature. The results showed the relationship as shown in FIG. Next, using this relationship, a coefficient for converting the battery capacity at each temperature to the battery capacity at 20 ° C. (hereinafter referred to as a correction coefficient)
Is obtained, the relationship between the correction coefficient (f (T)) and the temperature (T) is as shown in FIG. Note that a relational expression shown in Equation 1 is established between the battery capacity before correction (C ′), the battery capacity after correction (C), and the correction coefficient (f (T)).
【００１４】[0014]
【数１】 (Equation 1)
【００１５】こうして得られた補正係数を用いて次のよ
うにして電池容量の補正を行った。充電状態の電池を
０．７２Ａの定電流で３．０Ｖまで放電し、図４に示す
ように放電開始時点から放電終了時点までの間に放電終
了時点を含めて容量算出点Ｐを１点以上設定する。そし
て、この容量算出点Ｐあるいは放電開始時点から次の容
量算出点Ｐまでの時間（Δｔ）、そのときの温度（Ｔ
ｉ）を測定し、その間の放電容量（ΔＣ’ｉ）を算出す
る。ついで、数３によりこの放電容量にその温度の補正
係数を乗じ、これをこの間の補正放電容量（ΔＣｉ）と
する。この補正放電容量を数２より放電開始時点から放
電終了時点まで加算することにより、この電池の補正後
の電池容量を求めた。すなわち、数２および数３の関係
式を用いて補正後の電池容量を求めた。なお、以上の説
明では、容量算出点は４点であるので、放電容量（Δ
Ｃ’ｉ＝ΔＣ’１〜４），温度（Ｔｉ＝Ｔ１〜４），補
正放電容量（ΔＣｉ＝ΔＣ’１〜４）としている。Using the correction coefficient thus obtained, the battery capacity was corrected as follows. The battery in the charged state is discharged to 3.0 V at a constant current of 0.72 A, and as shown in FIG. 4, one or more capacity calculation points P including the discharge end point are included between the discharge start point and the discharge end point. Set. Then, the time (Δt) from the capacity calculation point P or the discharge start point to the next capacity calculation point P, and the temperature (T
i) is measured, and the discharge capacity (ΔC′i) during the measurement is calculated. Next, this discharge capacity is multiplied by a correction coefficient of the temperature by Equation 3, and this is set as a corrected discharge capacity (ΔCi) during this time. The corrected battery capacity of this battery was determined by adding the corrected discharge capacity from Equation 2 from the discharge start time to the discharge end time. That is, the corrected battery capacity was obtained using the relational expressions of Equations 2 and 3. In the above description, since the capacity calculation points are four points, the discharge capacity (Δ
C′i = ΔC′1 to 4), temperature (Ti = T1 to 4), and corrected discharge capacity (ΔCi = ΔC′1 to 4).
【００１６】[0016]
【数２】 (Equation 2)
【００１７】[0017]
【００１８】[0018]
【数３】 (Equation 3)
【００１９】（実施例１）充電状態の電池を０．７２Ａ
の定電流で３．０Ｖまで放電し、このときの電池容量に
対して、容量算出点Ｐとして図４における放電終了時点
の１点だけを設定し、容量補正を実施した。(Embodiment 1) A charged battery is 0.72 A
The battery was discharged at a constant current of 3.0 V to 3.0 V, and only one point at the end of discharging in FIG. 4 was set as the capacity calculation point P with respect to the battery capacity at this time, and the capacity was corrected.
【００２０】（実施例２）充電状態の電池を０．７２Ａ
の定電流で３．０Ｖまで放電し、このときの電池容量に
対して、容量算出点Ｐとして、放電終了時点、および放
電開始時点から放電終了時点までの放電時間の１／２を
経過した時点の２点を設定し、容量補正を実施した。(Embodiment 2) A charged battery is 0.72 A
At a constant current of 3.0 V, and the time at which half of the discharge time from the discharge start time to the discharge end time elapses as the capacity calculation point P with respect to the battery capacity at this time. Were set, and volume correction was performed.
【００２１】（実施例３）充電状態の電池を０．７２Ａ
の定電流で３．０Ｖまで放電し、このときの電池容量に
対して、容量算出点Ｐとして、放電終了時点と、放電開
始時点から放電終了時点までの放電時間の１／１０，２
／１０，３／１０，４／１０，５／１０，６／１０，７
／１０，８／１０，９／１０を経過した時点の１０点を
設定し、容量補正を実施した。(Embodiment 3) A charged battery is 0.72 A
At a constant current of 3.0 V, and the battery capacity at this time is defined as a capacity calculation point P at the discharge end point and 1/10, 2 of the discharge time from the discharge start point to the discharge end point.
/ 10, 3/10, 4/10, 5/10, 6/10/7
/ 10, 8/10, and 9/10 were set, and the capacity was corrected.
【００２２】（実施例４）放電時の環境温度を１０℃に
保つ以外は実施例１の場合と全く同じ処理を行った。(Example 4) Except that the environmental temperature during discharge was kept at 10 ° C, the same processing as in Example 1 was performed.
【００２３】（実施例５）放電時の環境温度を２０℃に
保つ以外は実施例１の場合と全く同じ処理を行った。(Example 5) Except that the environmental temperature during discharge was kept at 20 ° C, the same processing as in Example 1 was performed.
【００２４】（実施例６）放電時の環境温度を３０℃に
保つ以外は実施例１の場合と全く同じ処理を行った。(Example 6) Except that the environmental temperature during discharge was kept at 30 ° C, the same processing as in Example 1 was performed.
【００２５】（比較例１）充電状態の電池を０．７２Ａ
の定電流で３．０Ｖまで放電し、このときの電池容量に
対して、容量補正を実施しない。(Comparative Example 1) A charged battery was 0.72 A
At a constant current of 3.0 V, and no capacity correction is performed on the battery capacity at this time.
【００２６】（比較例２）放電時の環境温度を１０℃に
保つ以外は比較例１の場合と全く同じ処理を行った。(Comparative Example 2) Except that the environmental temperature during discharge was kept at 10 ° C, the same processing as in Comparative Example 1 was performed.
【００２７】（比較例３）放電時の環境温度を２０℃に
保つ以外は比較例１の場合と全く同じ処理を行った。(Comparative Example 3) Except that the environmental temperature during discharge was kept at 20 ° C, the same processing as in Comparative Example 1 was performed.
【００２８】（比較例４）放電時の環境温度を３０℃に
保つ以外は比較例１の場合と全く同じ処理を行った。(Comparative Example 4) Except that the environmental temperature during discharge was kept at 30 ° C, the same processing as in Comparative Example 1 was performed.
【００２９】上記の実施例２，３，４，５，６および比
較例２，３，４のそれぞれの処理を行った各１０００個
の電池について、その電池容量を測定し、一方、実施例
１および比較例１の処理を１日２回，５日間１回当たり
それぞれ行った各１０００個の電池について、その電池
容量を測定した結果は表１に示す通りである。なお、表
１には、得られた容量の平均値と標準偏差値とをまとめ
ている。The battery capacity of each of the 1000 batteries subjected to each of the processes of Examples 2, 3, 4, 5, 6 and Comparative Examples 2, 3, and 4 was measured. Table 1 shows the results of measuring the battery capacity of each of the 1000 batteries that were subjected to the treatment of Comparative Example 1 twice a day for 5 days. Table 1 summarizes the average value and the standard deviation value of the obtained capacities.
【００３０】[0030]
【表１】 [Table 1]
【００３１】比較例２，３，４および実施例４，５，６
の容量分布について検討すると、容量の平均値は変化す
るものの、その容量ばらつきを示す標準偏差値は、ほぼ
同じである。また、実施例１の場合もほぼ同じ標準偏差
値を示した。しかし、比較例１の場合は、他の場合と異
なり標準偏差値は非常に大きな値を示しており、これは
様々な温度環境で容量測定を行ったため、温度の影響を
受け易い電池容量が、その影響により大きなばらつきを
持ったものと考えられる。比較例２，３，４の容量の平
均値が異なることからも、環境温度が電池容量に影響を
与えていることは明確である。Comparative Examples 2, 3, 4 and Examples 4, 5, 6
When examining the capacity distribution, the average value of the capacity changes, but the standard deviation value indicating the capacity variation is almost the same. Also, in the case of Example 1, almost the same standard deviation value was shown. However, in the case of Comparative Example 1, unlike the other cases, the standard deviation value shows a very large value. This is because the capacity was measured in various temperature environments. It is considered that there was a large variation due to the influence. It is clear from the difference in the average values of the capacities of Comparative Examples 2, 3, and 4 that the environmental temperature affects the battery capacity.
【００３２】一方、実施例４，５，６の場合、容量の平
均値も標準偏差値もほぼ同じ値を示し、また、実施例１
では、様々な環境温度で容量測定を行ったにもかかわら
ず容量の平均も標準偏差値も実施例４，５，６の場合と
ほぼ同じ値を示した。これらのことより、温度補正処理
を行うことで環境温度に影響されない電池容量の測定が
可能となることは明らかである。On the other hand, in the case of Examples 4, 5, and 6, both the average value and the standard deviation value of the capacity show almost the same value.
Although the capacity was measured at various environmental temperatures, the average and standard deviation of the capacity showed almost the same values as those of Examples 4, 5, and 6. From these facts, it is clear that performing the temperature correction processing makes it possible to measure the battery capacity independent of the environmental temperature.
【００３３】また、比較例１，実施例１，２，３の標準
偏差値を見ると、容量算出点の設定数、すなわち補正回
数の多いものになるほどその値は小さくなっている。容
量算出時の標準偏差値σと容量算出点の設定数（補正回
数）との関係を示す図５から明らかなように、容量に対
する補正効果は補正の回数が多いほど大きく、補正する
手間を考慮しても２回以上の補正が好ましいことを示し
ている。Further, looking at the standard deviation values of Comparative Example 1, Examples 1, 2 and 3, the value decreases as the set number of capacity calculation points, that is, the number of times of correction increases. As is clear from FIG. 5 showing the relationship between the standard deviation value σ at the time of calculating the capacity and the set number of the capacity calculation points (the number of corrections), the correction effect on the capacity increases as the number of corrections increases, and the labor for correction is considered. This shows that two or more corrections are preferable.
【００３４】なお、上記のような検討をニッケルカドニ
ウム蓄電池やニッケル水素蓄電池において実施したとこ
ろ、電池系にかかわらず、電池温度や環境温度に影響さ
れずに、複数の電池を同じ尺度の下で比較可能な電池容
量を測定することができた。また、その効果は水溶液系
の電解液を用いた電池よりも非水系の電解液を用いた電
池おいてより顕著に見られた。When the above study was carried out on nickel-cadmium storage batteries and nickel-metal hydride storage batteries, a plurality of batteries were compared under the same scale regardless of the battery system, regardless of the battery temperature or the environmental temperature. The possible battery capacity could be measured. The effect was more remarkable in the battery using the non-aqueous electrolyte than in the battery using the aqueous electrolyte.
【００３５】[0035]
【発明の効果】本発明は、以上に説明したような形態で
実施され、予め、電池温度もしくは環境温度と放電容量
との関係を導き出し、電池温度もしくは環境温度を測定
しつつ、電池容量を測定し、前記関係を用いて一定条件
に電池容量の補正を行うものであり、電池温度や環境温
度に影響されずに、複数の電池は同じ尺度の下で比較可
能な電池容量として測定することができ、その結果とし
て品質の安定した高信頼性の電池を、また、組電池にお
いては、より性能の高いものを提供することができる。The present invention is embodied in the form as described above. The relationship between the battery temperature or the environmental temperature and the discharge capacity is derived in advance, and the battery capacity is measured while measuring the battery temperature or the environmental temperature. However, the battery capacity is corrected under certain conditions using the above relationship, and a plurality of batteries can be measured as comparable battery capacities under the same scale without being affected by battery temperature or environmental temperature. As a result, it is possible to provide a highly reliable battery with stable quality and, as a battery pack, a battery with higher performance.
【図１】本発明の実施例に用いた円筒形リチウムイオン
二次電池の縦断面図FIG. 1 is a longitudinal sectional view of a cylindrical lithium ion secondary battery used in an embodiment of the present invention.
【図２】同円筒形リチウムイオン二次電池の電池容量と
温度との関係線図FIG. 2 is a diagram showing the relationship between battery capacity and temperature of the cylindrical lithium ion secondary battery.
【図３】同円筒形リチウムイオン二次電池の補正係数と
温度との関係線図FIG. 3 is a diagram showing a relationship between a correction coefficient and a temperature of the cylindrical lithium ion secondary battery.
【図４】同円筒形リチウムイオン二次電池の容量を算出
する説明図FIG. 4 is an explanatory diagram for calculating the capacity of the cylindrical lithium ion secondary battery.
【図５】同円筒形リチウムイオン二次電池における放電
容量の標準偏差値と補正回数との関係線図FIG. 5 is a graph showing the relationship between the standard deviation value of the discharge capacity and the number of corrections in the cylindrical lithium ion secondary battery.
１ 電池ケース ２ 封口蓋 ３ 構成群 ４ 正極リード ５ 負極リード ６ 上部絶縁板 ７ 下部絶縁板 DESCRIPTION OF SYMBOLS 1 Battery case 2 Sealing lid 3 Component group 4 Positive electrode lead 5 Negative lead 6 Upper insulating plate 7 Lower insulating plate
フロントページの続き (72)発明者 石田 佳子 大阪府門真市大字門真1006番地 松下電器 産業株式会社内Continued on the front page (72) Inventor Yoshiko Ishida 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (3)
の関係を予め導出し、所定の電池温度もしくは環境温度
で測定した電池容量を、前記で導出した関係を用いて補
正することにより、複数の電池の電池容量を同じ尺度で
測定する二次電池の容量測定方法。A relationship between a battery temperature or an environmental temperature and a discharge capacity is derived in advance, and a plurality of battery capacities measured at a predetermined battery temperature or an environmental temperature are corrected using the relationship derived as described above. A method for measuring the capacity of a secondary battery in which the battery capacity of a battery is measured on the same scale.
くは放電開始時点より放電終了時点までの間の所定の算
出点で行う請求項１記載の二次電池の容量測定方法。2. The method for measuring the capacity of a secondary battery according to claim 1, wherein the correction of the battery capacity is performed at a discharge end point or at a predetermined calculation point from the discharge start point to the discharge end point.
における電池容量に変換する補正係数を温度の関数と
し、放電開始時点より放電終了時点までの間に設定した
容量算出点における電池温度もしくは環境温度に対応す
る補正係数ｆ（Ｔｉ）と、この容量算出点までの放電容
量ΔＣ’ｉとの積を、補正した放電容量ΔＣｉとする請
求項１記載の二次電池の容量測定方法。3. The battery capacity at a predetermined temperature is set to 20 ° C.
A correction coefficient f (Ti) corresponding to a battery temperature or an environmental temperature at a capacity calculation point set from a discharge start point to a discharge end point, and a correction coefficient f (Ti) corresponding to the battery capacity at the discharge start point to the discharge end point. The method for measuring the capacity of a secondary battery according to claim 1, wherein a product of the discharge capacity ΔC′i up to the point is a corrected discharge capacity ΔCi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8178876A JPH1020005A (en) | 1996-07-09 | 1996-07-09 | Rechargeable battery capacity measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8178876A JPH1020005A (en) | 1996-07-09 | 1996-07-09 | Rechargeable battery capacity measurement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1020005A true JPH1020005A (en) | 1998-01-23 |
Family
ID=16056247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8178876A Pending JPH1020005A (en) | 1996-07-09 | 1996-07-09 | Rechargeable battery capacity measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1020005A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765491A (en) * | 2018-12-19 | 2019-05-17 | 深圳市比克动力电池有限公司 | Battery temperature and capacity correction method, device and terminal equipment |
| CN112034368A (en) * | 2020-08-24 | 2020-12-04 | 中兴高能技术有限责任公司 | Battery capacity calibration method and device |
| CN112034369A (en) * | 2020-08-24 | 2020-12-04 | 中兴高能技术有限责任公司 | Method and device for determining battery capacity |
| CN115963403A (en) * | 2022-11-10 | 2023-04-14 | 中国电子科技集团公司第十八研究所 | Lithium primary battery SOC estimation method based on current and temperature state information |
| CN116027210A (en) * | 2022-12-19 | 2023-04-28 | 信义电源(苏州)有限公司 | A method and system for correcting the capacity of a lithium-ion battery by capacity division test |
| CN116047296A (en) * | 2023-01-05 | 2023-05-02 | 国民技术股份有限公司 | Prediction method, terminal equipment and storage medium of battery cut-off capacity |
| CN118641978A (en) * | 2024-06-17 | 2024-09-13 | 无锡凌博电子技术股份有限公司 | Method and system for estimating SOC by combining absolute capacity and open circuit voltage |
-
1996
- 1996-07-09 JP JP8178876A patent/JPH1020005A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765491A (en) * | 2018-12-19 | 2019-05-17 | 深圳市比克动力电池有限公司 | Battery temperature and capacity correction method, device and terminal equipment |
| CN112034368A (en) * | 2020-08-24 | 2020-12-04 | 中兴高能技术有限责任公司 | Battery capacity calibration method and device |
| CN112034369A (en) * | 2020-08-24 | 2020-12-04 | 中兴高能技术有限责任公司 | Method and device for determining battery capacity |
| CN115963403A (en) * | 2022-11-10 | 2023-04-14 | 中国电子科技集团公司第十八研究所 | Lithium primary battery SOC estimation method based on current and temperature state information |
| CN116027210A (en) * | 2022-12-19 | 2023-04-28 | 信义电源(苏州)有限公司 | A method and system for correcting the capacity of a lithium-ion battery by capacity division test |
| CN116047296A (en) * | 2023-01-05 | 2023-05-02 | 国民技术股份有限公司 | Prediction method, terminal equipment and storage medium of battery cut-off capacity |
| CN118641978A (en) * | 2024-06-17 | 2024-09-13 | 无锡凌博电子技术股份有限公司 | Method and system for estimating SOC by combining absolute capacity and open circuit voltage |
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