JPH0888028A - Capacity confirming method for secondary battery - Google Patents
Capacity confirming method for secondary batteryInfo
- Publication number
- JPH0888028A JPH0888028A JP6220418A JP22041894A JPH0888028A JP H0888028 A JPH0888028 A JP H0888028A JP 6220418 A JP6220418 A JP 6220418A JP 22041894 A JP22041894 A JP 22041894A JP H0888028 A JPH0888028 A JP H0888028A
- Authority
- JP
- Japan
- Prior art keywords
- secondary battery
- capacity
- impedance
- resistance value
- master curve
- 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
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、充放電可能な２次電池
の電池容量を確認する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for checking the battery capacity of a rechargeable secondary battery.
【０００２】[0002]
【従来の技術】従来より、自動車や自動二輪車等におけ
る電気エネルギーの供給源として２次電池が用いられて
いる。この２次電池の充放電特性は、その使用頻度に応
じて変化、或いは経年劣化することが知られている。従
って、係る２次電池の現在の状態を常に監視し、把握し
ておく必要がある。2. Description of the Related Art Conventionally, secondary batteries have been used as a source of electric energy in automobiles and motorcycles. It is known that the charge / discharge characteristics of this secondary battery change or deteriorate over time depending on the frequency of use. Therefore, it is necessary to constantly monitor and grasp the current state of the secondary battery.
【０００３】この２次電池の状態（即ち、電池容量や劣
化程度）を簡易に反映する特性値として抵抗値が用いら
れている。この抵抗値の測定には、市販のミリオムメー
タ等が用いられており、従来は、所定の周波数「１ＫＨ
ｚ」における抵抗を測定していた。A resistance value is used as a characteristic value that simply reflects the state of the secondary battery (that is, the battery capacity and the degree of deterioration). A commercially available millimometer or the like is used for measuring the resistance value, and conventionally, a predetermined frequency "1 KH" is used.
The resistance at "z" was measured.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記の周波数
は、いわゆる物理的な電子伝導特性に基づき設定された
ものであり、これは、実際の２次電池の特性とは一致し
ていない。なぜなら、２次電池では、その充放電が金属
中の電子の運動を示すような物性的なものではなく、化
学反応により行われているからである。従って、従来の
測定方法で求められた抵抗値及びそれに対応する電池容
量は実際の２次電池の電池容量とは一致せず、正確な電
池容量の確認・把握ができないという問題があった。However, the above-mentioned frequency is set based on the so-called physical electron conduction characteristic, which does not match the characteristic of the actual secondary battery. This is because the charge and discharge of the secondary battery is not a physical property that shows the movement of electrons in the metal, but is performed by a chemical reaction. Therefore, the resistance value obtained by the conventional measurement method and the battery capacity corresponding thereto do not match the actual battery capacity of the secondary battery, and there is a problem that the battery capacity cannot be accurately confirmed and grasped.
【０００５】本発明は、上記事情に鑑みなされたもの
で、２次電池の化学反応に適した周波数範囲における抵
抗値を求め、その抵抗値に基づき２次電池の電池容量を
推定・確認する２次電池の容量確認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 obtains a resistance value in a frequency range suitable for a chemical reaction of a secondary battery, and estimates and confirms the battery capacity of the secondary battery based on the resistance value. The purpose is to provide a method for checking the capacity of the secondary battery.
【０００６】[0006]
【課題を解決しようとする手段】上述した問題点を解決
するために、請求項１記載の発明では、所定の低周波数
において２次電池のインピーダンスを測定し、当該イン
ピーダンスから実抵抗成分の抵抗値を求め、係る抵抗値
に基づき、予め用意されたマスターカーブから電池容量
を読み取るようにした。In order to solve the above-mentioned problems, according to the invention of claim 1, the impedance of the secondary battery is measured at a predetermined low frequency and the resistance value of the actual resistance component is calculated from the impedance. Then, based on the resistance value, the battery capacity was read from the master curve prepared in advance.
【０００７】請求項２記載の発明は、前記請求項１記載
の発明において、前記所定の低周波数を０．１Ｈｚ〜
１．０Ｈｚの範囲内としている。According to a second aspect of the invention, in the invention of the first aspect, the predetermined low frequency is 0.1 Hz to
It is within the range of 1.0 Hz.
【０００８】また、請求項３記載の発明は、前記請求項
１に記載されたような２次電池の容量確認方法に適用さ
れるマスターカーブの作成方法であって、特定の２次電
池に関して所定の低周波数におけるインピーダンスを測
定し、当該インピーダンスから実抵抗成分の抵抗値を算
出し、当該抵抗値における実際の電池容量を測定し、上
記の測定を繰り返すことにより、特定の２次電池に関す
る抵抗値と電池容量との相関関係を示すマスターカーブ
を作成する。The invention according to claim 3 is a method of creating a master curve which is applied to the method for confirming the capacity of a secondary battery as described in claim 1, wherein a predetermined predetermined value is given for a specific secondary battery. By measuring the impedance at a low frequency, calculating the resistance value of the actual resistance component from the impedance, measuring the actual battery capacity at the resistance value, and repeating the above measurement to determine the resistance value for the specific secondary battery. Create a master curve that shows the correlation between and the battery capacity.
【０００９】請求項４記載の発明は、前記請求項３記載
の発明において、前記所定の低周波数を０．１Ｈｚ〜
１．０Ｈｚの範囲内としている。According to a fourth aspect of the invention, in the invention of the third aspect, the predetermined low frequency is 0.1 Hz to
It is within the range of 1.0 Hz.
【００１０】[0010]
【作用】この発明によれば、特定の２次電池について抵
抗値と電池容量との相関関係を示すマスターカーブを作
成し、その後、電池容量を知りたい２次電池の抵抗値を
インピーダンス法により求め、その抵抗値に基づき、前
記マスターカーブから電池容量を読み取るようにした。
従って、各種類の２次電池毎について正確に電池容量を
読み取り、確認することができる。According to the present invention, a master curve showing the correlation between the resistance value and the battery capacity is created for a specific secondary battery, and then the resistance value of the secondary battery whose battery capacity is to be obtained is determined by the impedance method. The battery capacity was read from the master curve based on the resistance value.
Therefore, the battery capacity can be accurately read and confirmed for each type of secondary battery.
【００１１】また、インピーダンスを測定する周波数を
０．１Ｈｚ〜１．０Ｈｚとしたのは、そのような周波数
の範囲において化学反応における電子移動の抵抗値が顕
著に現れるからで、この範囲でインピーダンスを測定す
ることによって、２次電池の容量と直接的に結びつくイ
ンピーダンスを得ることができる。The frequency at which the impedance is measured is set to 0.1 Hz to 1.0 Hz because the resistance value of electron transfer in the chemical reaction remarkably appears in such a frequency range, and the impedance is measured in this range. By measuring, the impedance directly linked to the capacity of the secondary battery can be obtained.
【００１２】[0012]
【実施例】図１は、本発明による２次電池の容量確認方
法に対応する電池容量確認手順を示すフローチャートで
あり、図２は本発明に適用されるインピーダンス測定方
法を実施する装置構成を示すブロック図である。1 is a flow chart showing a battery capacity confirmation procedure corresponding to a secondary battery capacity confirmation method according to the present invention, and FIG. 2 shows an apparatus configuration for implementing an impedance measuring method applied to the present invention. It is a block diagram.
【００１３】先ず、２次電池の容量を確認するに先だっ
て、図１のステップＳ１に示すように、２次電池のイン
ピーダンスを測定する。このインピーダンス測定は、異
なる容量を有する２次電池の種類（例えば、単電池及び
組電池）毎に行われる。また、このインピーダンス測定
の周波数は、０．１Ｈｚ〜１Ｈｚの範囲内から選ばれ
る。この周波数の範囲は、本発明者等による種々の試験
結果から得られたもので、２次電池の容量確認に好適な
範囲であることが確認されている。First, before confirming the capacity of the secondary battery, the impedance of the secondary battery is measured as shown in step S1 of FIG. This impedance measurement is performed for each type of secondary batteries having different capacities (for example, single battery and assembled battery). The frequency of this impedance measurement is selected from the range of 0.1 Hz to 1 Hz. This frequency range has been obtained from various test results by the present inventors and has been confirmed to be a range suitable for confirming the capacity of the secondary battery.
【００１４】たとえば、周波数０．１Ｈｚにおけるイン
ピーダンスより得られる２次電池の抵抗値は、電極界面
での充電・放電に関する化学反応の抵抗及び物質の拡散
の抵抗を表しており、電池容量の直接的な指標となりう
ることが実験で確認されている。For example, the resistance value of the secondary battery, which is obtained from the impedance at a frequency of 0.1 Hz, represents the resistance of the chemical reaction regarding the charging / discharging at the electrode interface and the resistance of the diffusion of the substance, and is a direct measure of the battery capacity. It has been confirmed by experiments that it can be used as a new index.
【００１５】図２に示すインピーダンス測定装置は、周
波数特性分析器１と増幅用電源２とを備え、この構成に
より、測定対象である２次電池３のインピーダンスを測
定する。このインピーダンス測定装置では、前記した周
波数領域０．１Ｈｚ〜１Ｈｚにおいて、２次電池３に対
し、入力として電流を供給し、その出力として電圧値を
得る。そして、「電流値／電圧値」からインピーダンス
を算出するようになっている。The impedance measuring device shown in FIG. 2 is provided with a frequency characteristic analyzer 1 and an amplifying power source 2, and with this configuration, the impedance of the secondary battery 3 to be measured is measured. In this impedance measuring device, current is supplied as an input to the secondary battery 3 and a voltage value is obtained as its output in the above-mentioned frequency region of 0.1 Hz to 1 Hz. Then, the impedance is calculated from the "current value / voltage value".
【００１６】次に、図１のステップＳ２に示すように、
測定された複素インピーダンスから実抵抗成分を求める
が、この抵抗成分の算出にはいわゆる交流インピーダン
ス法が採用される。その後、ステップＳ３に示すよう
に、求められた抵抗値をマスターカーブで照合して２次
電池の電池容量を求める。Next, as shown in step S2 of FIG.
The actual resistance component is obtained from the measured complex impedance, and the so-called AC impedance method is used to calculate this resistance component. Then, as shown in step S3, the obtained resistance value is collated with the master curve to obtain the battery capacity of the secondary battery.
【００１７】図３は、上記のマスターカーブの一例を示
すグラフである。このグラフは、各種類毎の２次電池に
おいて、実際に抵抗値とその電池容量とを測定した結果
得られるもので、グラフ上「○」印で示される各プロッ
ト点から１本のカーブを描き、これをマスターカーブと
して用いる。このマスターカーブに示すように、抵抗値
と電池容量との関係は概ね比例関係にあるものの、実際
の２次電池の使われ方、使用頻度や経年劣化等により、
一定のカーブを描くように変化する。FIG. 3 is a graph showing an example of the above master curve. This graph is obtained as a result of actually measuring the resistance value and the battery capacity of each type of secondary battery, and draws one curve from each plot point indicated by "○" on the graph. , Use this as the master curve. As shown in this master curve, although the relationship between the resistance value and the battery capacity is almost proportional, due to the actual usage of the secondary battery, the frequency of use, deterioration over time, etc.
It changes to draw a constant curve.
【００１８】一旦上記のようなマスターカーブが作成さ
れると、それが同種類の２次電池の電池容量の確認に用
いられる。したがって、履歴不明の２次電池の抵抗値を
前記インピーダンス法により求め、その後、求められた
抵抗値を予め準備されたマスターカーブと照合すること
により、その２次電池の電池容量を求めることができ
る。Once the master curve as described above is created, it is used to confirm the battery capacity of a secondary battery of the same type. Therefore, the battery capacity of the secondary battery can be obtained by obtaining the resistance value of the secondary battery whose history is unknown by the impedance method, and then by collating the obtained resistance value with the prepared master curve. .
【００１９】上記のような２次電池の容量確認方法にお
いては、２次電池の化学反応に適した周波数範囲におけ
る抵抗値を求め、その抵抗値に基づき２次電池の電池容
量を推定・確認するので、２次電池の容量を正確に把握
することができる。In the secondary battery capacity confirmation method as described above, the resistance value in the frequency range suitable for the chemical reaction of the secondary battery is obtained, and the battery capacity of the secondary battery is estimated and confirmed based on the resistance value. Therefore, the capacity of the secondary battery can be accurately grasped.
【００２０】特に、上記実施例では、インピーダンスを
測定する周波数を０．１Ｈｚ〜１．０Ｈｚとしているの
で、２次電池の容量と直接的に結びつくインピーダンス
を得ることができ、２次電池の容量をより正確に把握す
ることができる。In particular, in the above embodiment, the frequency for measuring the impedance is 0.1 Hz to 1.0 Hz, so that the impedance directly linked to the capacity of the secondary battery can be obtained, and the capacity of the secondary battery can be determined. It can be grasped more accurately.
【００２１】なお、上記実施例は２次電池の容量を確認
する方法についてのものであるが、本発明を容量確認装
置にも適用することができる。たとえば、２次電池の容
量確認装置は、図３に示すマスターカーブを記憶したメ
モリと、図２に示すインピーダンス測定装置と、複素イ
ンピーダンスから実抵抗成分を求める演算手段（図１ス
テップＳ２）と、メモリからマスターカーブを読み出
し、実抵抗成分をマスターカーブに照らし合わせて２次
電子の容量を出力するＣＰＵを備えることにより構成す
ることができる。Although the above embodiment relates to the method of confirming the capacity of the secondary battery, the present invention can be applied to the capacity confirming device. For example, the secondary battery capacity confirmation device includes a memory storing the master curve shown in FIG. 3, an impedance measuring device shown in FIG. 2, an arithmetic means for obtaining an actual resistance component from complex impedance (step S2 in FIG. 1), It can be configured by including a CPU that reads the master curve from the memory, compares the actual resistance component with the master curve, and outputs the capacity of the secondary electrons.
【００２２】[0022]
【発明の効果】以上説明したように本発明によれば、所
定の低周波数においてインピーダンス法により２次電池
の抵抗値を求め、その抵抗値に基づき、予め用意され
た、抵抗値と電池容量との相関関係を示すマスターカー
ブから対応する電池容量を読み取るようにしたので、２
次電池の特性を反映した正確な電池容量を把握すること
ができるという効果を奏する。As described above, according to the present invention, the resistance value of the secondary battery is obtained by the impedance method at a predetermined low frequency, and the resistance value and the battery capacity prepared in advance are calculated based on the resistance value. Since the corresponding battery capacity is read from the master curve showing the correlation of
It is possible to obtain an accurate battery capacity that reflects the characteristics of the secondary battery.
【図１】本発明の２次電池の容量確認方法の手順を示す
フローチャートである。FIG. 1 is a flowchart showing a procedure of a secondary battery capacity confirmation method of the present invention.
【図２】本発明に適用される２次電池のインピーダンス
測定方法を具現化する装置構成を示すブロック図であ
る。FIG. 2 is a block diagram showing a device configuration that embodies an impedance measuring method for a secondary battery applied to the present invention.
【図３】本発明に用いられるマスターカーブの一例を示
すグラフである。FIG. 3 is a graph showing an example of a master curve used in the present invention.
１ 周波数特性分析器 ２ 増幅用電源 ３ ２次電池 1 Frequency characteristic analyzer 2 Power supply for amplification 3 Secondary battery
Claims (4)
ピーダンスを測定し、 当該インピーダンスから実抵抗成分の抵抗値を求め、 係る抵抗値に基づき、予め用意されたマスターカーブか
ら電池容量を読み取るようにしたことを特徴とする２次
電池の容量確認方法。1. The impedance of the secondary battery is measured at a predetermined low frequency, the resistance value of the actual resistance component is obtained from the impedance, and the battery capacity is read from a master curve prepared in advance based on the resistance value. A method for confirming the capacity of a secondary battery, characterized in that
１．０Ｈｚの範囲内であることを特徴とする請求項１記
載の２次電池の容量確認方法。2. The predetermined low frequency is 0.1 Hz to
The method for confirming the capacity of a secondary battery according to claim 1, wherein the method is within a range of 1.0 Hz.
スターカーブの作成方法であって、特定の２次電池に関
して所定の低周波数におけるインピーダンスを測定し、 当該インピーダンスから実抵抗成分の抵抗値を算出し、 当該抵抗値における実際の電池容量を測定し、 上記の測定を繰り返すことにより、特定の２次電池に関
する抵抗値と電池容量との相関関係を示すマスターカー
ブを作成することを特徴とするマスターカーブの作成方
法。3. A method for creating a master curve applied to a method for confirming the capacity of a secondary battery, which comprises measuring an impedance at a predetermined low frequency with respect to a specific secondary battery, and measuring a resistance value of an actual resistance component from the impedance. Is calculated, the actual battery capacity at the resistance value is measured, and the above measurement is repeated to create a master curve showing the correlation between the resistance value and the battery capacity for a specific secondary battery. How to create a master curve.
１．０Ｈｚの範囲内であることを特徴とする請求項３記
載の２次電池の容量確認方法に適用されるマスターカー
ブの作成方法。4. The predetermined low frequency is 0.1 Hz to
The method for creating a master curve applied to the method for confirming the capacity of a secondary battery according to claim 3, wherein the method is within a range of 1.0 Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6220418A JPH0888028A (en) | 1994-09-14 | 1994-09-14 | Capacity confirming method for secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6220418A JPH0888028A (en) | 1994-09-14 | 1994-09-14 | Capacity confirming method for secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0888028A true JPH0888028A (en) | 1996-04-02 |
Family
ID=16750803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6220418A Pending JPH0888028A (en) | 1994-09-14 | 1994-09-14 | Capacity confirming method for secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0888028A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08250160A (en) * | 1995-03-08 | 1996-09-27 | Nippon Telegr & Teleph Corp <Ntt> | Method for deriving regression expression for estimating capacity of trickling ni-cd battery |
| CN106842066A (en) * | 2017-04-21 | 2017-06-13 | 惠州亿纬锂能股份有限公司 | The detection method and device of a kind of discharge capacity of the cell |
-
1994
- 1994-09-14 JP JP6220418A patent/JPH0888028A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08250160A (en) * | 1995-03-08 | 1996-09-27 | Nippon Telegr & Teleph Corp <Ntt> | Method for deriving regression expression for estimating capacity of trickling ni-cd battery |
| CN106842066A (en) * | 2017-04-21 | 2017-06-13 | 惠州亿纬锂能股份有限公司 | The detection method and device of a kind of discharge capacity of the cell |
| CN106842066B (en) * | 2017-04-21 | 2019-03-08 | 惠州亿纬锂能股份有限公司 | A kind of detection method and device of discharge capacity of the cell |
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