JP2004286642A - Charge condition detection method for storage battery - Google Patents
Charge condition detection method for storage battery Download PDFInfo
- Publication number
- JP2004286642A JP2004286642A JP2003080306A JP2003080306A JP2004286642A JP 2004286642 A JP2004286642 A JP 2004286642A JP 2003080306 A JP2003080306 A JP 2003080306A JP 2003080306 A JP2003080306 A JP 2003080306A JP 2004286642 A JP2004286642 A JP 2004286642A
- Authority
- JP
- Japan
- Prior art keywords
- soc
- storage battery
- charge
- region
- detection method
- 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
Images
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)
- Electric Propulsion And Braking For Vehicles (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
Description
【０００１】
【発明の属する技術分野】
本発明はハイブリッド自動車に用いられる電池のような充電状態（Ｓｔａｔｅｏｆ ｃｈａｒｇｅ：以下、ＳＯＣ）をある設定領域内で制御する電源システムにおけるＳＯＣの検知方法に関するものである。
【０００２】
【従来の技術】
エンジン動力とモータ動力を組み合わせたハイブリッド自動車において、モータ動力による走行アシスト時には内蔵された電池からモータに電力が供給される。また、車両を減速・停止させる際には車両の運動エネルギーを変換して得た電気エネルギーを電池に蓄積する、いわゆる回生充電を行うことによって、エネルギーを効率的に利用する。
【０００３】
このような車両に用いられる電池は、アシスト走行時にモータに供給する電力を確保し、かつ回生充電を効率良く受け入れることが求められる。したがって、電池のＳＯＣは満充電状態を１００％とした場合に、例えば５０％〜９５％の部分充電状態に制御する。
【０００４】
また、前記したようなハイブリッド自動車の他に太陽光発電や風力発電システムでは出力を平準化するための電池を有しているものがある。このようなシステムでは自然条件により発電量が変化するために、負荷に対しての発電量の過不足が発生する。そこで発電量が負荷に対して余剰がある場合には、この余剰電力を電池に蓄積し、発電量が負荷に対して不足する場合には、この不足電力を電池から補う。したがって、このような発電システムに併用される電池も、ハイブリッド自動車用の電池と同様、余剰電力を効率的に受入れ、かつ不足電力を補うために適切なＳＯＣ領域内で制御される。
【０００５】
前記したようなシステムにおける電池のＳＯＣ制御はシステムの効率を高める上で重要であることから、電池のＳＯＣを検知するための方法について検討が行われてきている。このＳＯＣの検知方法として放電電気量と充電電気量とを連続してモニターすることにより、任意の時刻における電池のＳＯＣを推定することができる。ところが、電池の充電効率のばらつき、さらには充電効率の経時変化によってＳＯＣの推定誤差が大きくなる。
【０００６】
一方、鉛蓄電池ではＳＯＣとＯＣＶとの間に相関が存在するので、鉛蓄電池の開路電圧（ＯＣＶ）を基に蓄電池のＳＯＣを推定することが知られている（例えば特許文献１参照）。
【０００７】
ところが、ハイブリッド車両に用いられる鉛蓄電池では車両の運行状況に応じて充放電が短い時間間隔で切り替わり、電池が開路状態にある時間は制限されるため、頻繁にＳＯＣを検知するには不都合であった。
【０００８】
そこで充電時の充電電圧値や放電時の放電電圧値からＳＯＣを推定する方法が検討されてきた。ところがハイブリッド車両用のようにＳＯＣが５０％〜９５％といった比較的広い範囲内で制御を行う場合、ＳＯＣの推定誤差を低く抑えることは困難であった。
【０００９】
【特許文献１】
特開２００１−３５１６９８号公報
【００１０】
【発明が解決しようとする課題】
本発明は、ハイブリッド車両用の蓄電池のような、ＳＯＣをある所定範囲内で制御する電源システムにおいて、例えば５０％〜９５％といった比較的広いＳＯＣ範囲内で、検知誤差の少ないＳＯＣ検知方法を提供するものである。
【００１１】
【課題を解決するための手段】
前記した課題を解決するために、本発明の請求項１に係る発明は、蓄電池の充電状態（ＳＯＣ）が所定のＳＯＣ領域内で制御される電源システムにおける前記ＳＯＣの検知方法であって、前記ＳＯＣ領域の下限近傍に設定される第１のＳＯＣ領域と、前記ＳＯＣ領域の上限近傍に設定され、かつ前記第１のＳＯＣ領域を含まない第２のＳＯＣ領域を設定し、前記ＳＯＣが前記第１のＳＯＣ領域内か前記第２のＳＯＣ領域内かを判定する判定ステップを有し、前記ステップにおいて前記ＳＯＣが前記第１のＳＯＣ領域内である場合には、前記ＳＯＣを第１のＳＯＣ検知方法によって検知するとともに、前記ＳＯＣが前記第２のＳＯＣ領域内である場合には、前記ＳＯＣを第２のＳＯＣ検知方法によって検知し、前記第１のＳＯＣ検知方法は前記蓄電池の放電電流（Ｉｄ）と放電電圧（Ｖｄ）に基いて前記ＳＯＣを検知し、前記第２のＳＯＣ検知方法は前記蓄電池の充電電流（Ｉｃ）と充電電圧（Ｖｃ）に基いて前記ＳＯＣを検知することを特徴とする蓄電池の充電状態検知方法を示すものである。
【００１２】
また、本発明の請求項２に係る発明は、請求項１の蓄電池の充電状態検知方法において、前記第１のＳＯＣ検知方法によって得たＳＯＣに基いて前記判定ステップを行うことを特徴とするものである。
【００１３】
そして、本発明の請求項３に係る発明は、請求項１の前記蓄電池の充電状態検知方法において、前記第２のＳＯＣ検知方法によって得たＳＯＣに基いて前記判定ステップを行うことを特徴とするものである。
【００１４】
【発明の実施の形態】
本発明の実施の形態による蓄電池の充電状態の検知方法を図面を用いて説明する。
【００１５】
図１および図２は本発明の蓄電池の充電状態の検知方法を適用する電源システムにおける蓄電池の充電状態（以下、ＳＯＣ）の推移の例を示す図である。ＳＯＣは上限であるＳＯＣ（ＵＬ）と下限であるＳＯＣ（ＬＬ）内に制御されている。例えばＳＯＣを５０〜９５％の領域内で制御する場合、ＳＯＣ（ＵＬ）は９５％、ＳＯＣ（ＬＬ）は５０％である。
【００１６】
そして本発明ではＳＯＣの下限近傍に第１のＳＯＣ領域とＳＯＣの上限近傍に第２のＳＯＣ領域を設定する。例えば図１に示したように、ＳＯＣ（ＬＬ）より大であり、ＳＯＣ（ＵＬ）未満であるＳＯＣ（ＬＰ）を設定し、ＳＯＣ（ＬＬ）≦ＳＯＣ≦ＳＯＣ（ＬＰ）を第１のＳＯＣ領域、また、ＳＯＣ（ＬＰ）以上であり、ＳＯＣ（ＵＬ）以下であるＳＯＣ（ＵＰ）を設定し、ＳＯＣ（ＵＰ）≦ＳＯＣ≦ＳＯＣ（ＵＬ）を第２のＳＯＣ領域とする。
【００１７】
なお、図２に示したようにＳＯＣ（ＬＰ）＝ＳＯＣ（ＵＰ）となることを妨げないが、この場合ＳＯＣ（ＬＰ）値、すなわち、ＳＯＣ（ＵＰ）値がどちらのＳＯＣ領域に入れるかを予め定義しておく必要がある。本実施の形態においてはＳＯＣ（ＬＰ）＝ＳＯＣ（ＵＰ）とし、ＳＯＣ（ＬＬ）≦ＳＯＣ≦ＳＯＣ（ＵＰ）を第１のＳＯＣ領域、ＳＯＣ（ＵＰ）＜ＳＯＣ≦ＳＯＣ（ＵＬ）を第２のＳＯＣ領域とした例について述べる。
【００１８】
図３と図４は本発明の実施の形態による蓄電池の充電状態（ＳＯＣ）検知方法のフローを示す図である。ＳＯＣ検知のスタート（Ｓ１）後、蓄電池が放電状態にあるかどうかの判定を行う（Ｓ２）。蓄電池が放電状態でない場合には所定時間待機後、放電判定（Ｓ２）を行う。この放電判定（Ｓ２）は蓄電池に流れる電流を検知し、これが電流値の符号から判定することができる。
【００１９】
蓄電池が放電状態にある場合、蓄電池の放電電流（Ｉｄ）の測定（Ｓ３）と、放電電圧（Ｖｄ）の測定（Ｓ４）が行われる。次にここで得られたＶｄとＩｄとの値から蓄電池のＳＯＣを求める。この放電時の電圧（Ｖｄ）−電流（Ｉｄ）との関係から求めたＳＯＣをＳＯＣ１とする（Ｓ５）。ここで蓄電池毎に予めＳＯＣ別にＶｄ−Ｉｄ値のデータ列を求めておき、このデータ列をメモリー等の記憶手段に記憶させておく。そしてＶｄ値とＩｄ値の実測値からこのデータ列を参照してＳＯＣ１を求める。なお、ここでデータ列を蓄電池温度毎に求めておけば、より精度よくＳＯＣ１を測定することができる。なお、放電開始後にＶｄは変化するため、放電開始後のＶｄの測定タイミングを所定時間内に行うことが必要である。
【００２０】
次にＳＯＣ１が下限近傍の第１のＳＯＣ領域内か、上限近傍の第２のＳＯＣ領域内かどうかを判定するステップ（Ｓ６）を行う。ここでＳＯＣ１が第１のＳＯＣ領域内、すなわち、ＳＯＣ（ＬＬ）≦ＳＯＣ１≦ＳＯＣ（ＵＰ）内である場合（ＹＥＳ）、このＳＯＣ１の値を蓄電池のＳＯＣとして出力する（Ｓ７）。ＳＯＣ１が第１のＳＯＣ領域外、すなわち、第２のＳＯＣ領域内である場合には図４に示した充電判定を行うステップ（Ｓ８）に移行する。
【００２１】
充電判定ステップ（Ｓ８）では蓄電池が充電中であるかどうかの判定を行う。蓄電池が放電中、あるいは充放電電流が０であり、実質上開路状態である場合には所定時間後に再び充電判定ステップ（Ｓ８）に移行する。
【００２２】
充電判定ステップ（Ｓ８）で蓄電池が充電中である場合にはこのときの充電電流（Ｉｃ）と充電電圧（Ｖｃ）の測定がそれぞれステップ（Ｓ９）とステップ（Ｓ１０）で行われる。そしてここで得られたＶｃとＩｃとの値から蓄電池のＳＯＣを求め、ＳＯＣ２とする（Ｓ１１）。なお、ＶｃおよびＩｃとＳＯＣとの関係は用いる蓄電池毎に予め求めたデータ列をメモリー等の記憶手段に保存しておき、ＶｃとＩｃの測定後、これらのデータ列を参照してＳＯＣ２を逆算する。なお、ここでデータ列を蓄電池温度毎に求めておけば、より精度よくＳＯＣ２を測定することができる。ここで求めたＳＯＣ２を蓄電池のＳＯＣとして出力する（Ｓ１２）。
【００２３】
本発明ではＳＯＣの値によってＳＯＣの測定方法を変えるものである。ＳＯＣが８０％程度以下の領域では放電時の電流（Ｉｄ）と電圧（Ｖｄ）の関係からＳＯＣを求める方法が充電時の電流（Ｉｃ）と電圧（Ｖｃ）の関係からＳＯＣを求める方法に比較して精度良くＳＯＣが検知できる。またＳＯＣが９５％といった上限に近いところでは充電時の電流（Ｉｃ）と電圧（Ｖｃ）の関係からＳＯＣを求める方法が放電時の電流（Ｉｄ）と電圧（Ｖｄ）をより精度よく求めることが可能である。
【００２４】
本発明では蓄電池のＳＯＣがどのＳＯＣ領域にあるのかを検知し、そのＳＯＣ領域に適したＳＯＣ検知方法を選択することにより、ＳＯＣの測定精度を高めることができる。なお、本実施形態では図２に示したように、ＳＯＣ（ＵＰ）＝ＳＯＣ（ＬＰ）とすることによって第１のＳＯＣ領域と第２のＳＯＣ領域が接するよう、設定したが、図１に示したように、ＳＯＣ（ＵＰ）＞ＳＯＣ（ＬＰ）とし、第１のＳＯＣ領域と第２のＳＯＣ領域の間にどちらにも属さない、第３のＳＯＣ領域を設けることも可能である。この第３の領域で第１のＳＯＣ領域と同様の放電電圧と放電電流に基づく方法を採用した場合には、前記した本発明の実施形態と実質上、同じとなる。また、放電電圧と放電電流によって求めたＳＯＣ（ＳＯＣ１）と充電電圧と充電電圧によって求めたＳＯＣ（ＳＯＣ２）との平均値を採用することもできる。
【００２５】
なお、本発明では蓄電池の電流−電圧の関係からＳＯＣを求めるため、これらの関係に比較的強い相関関係がある蓄電池、例えば鉛蓄電池やリチウム２次電池に適用すれば、ＳＯＣの検知精度をより高めることができる。
【００２６】
【発明の効果】
以上、説明してきたように、本発明による蓄電池の充電状態（ＳＯＣ）の検知方法によれば、例えば５０％〜９５％といった比較的広いＳＯＣ領域で精度よくＳＯＣを検知でき、ひいてはＳＯＣ制御を必要とする電源システムの制御精度を高めることができることから、工業上、極めて有用である。
【図面の簡単な説明】
【図１】蓄電池のＳＯＣ推移を示す図
【図２】蓄電池のＳＯＣ推移を示す図
【図３】本発明の実施の形態による充電状態検知方法のフローの一部を示す図
【図４】本発明の実施の形態による充電状態検知方法のフローの一部を示す図[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an SOC detection method in a power supply system that controls a state of charge (hereinafter, SOC) such as a battery used in a hybrid vehicle within a certain setting region.
[0002]
[Prior art]
In a hybrid vehicle that combines engine power and motor power, electric power is supplied to the motor from a built-in battery at the time of running assistance using motor power. Further, when the vehicle is decelerated and stopped, the energy is efficiently used by performing so-called regenerative charging in which electric energy obtained by converting kinetic energy of the vehicle is stored in a battery.
[0003]
A battery used in such a vehicle is required to secure electric power to be supplied to a motor during assist traveling and to efficiently accept regenerative charging. Therefore, the SOC of the battery is controlled to a partial charge state of, for example, 50% to 95% when the full charge state is 100%.
[0004]
In addition to the above-mentioned hybrid vehicles, some solar power generation systems and wind power generation systems have a battery for leveling the output. In such a system, since the amount of power generation changes due to natural conditions, excess or deficiency of the power generation with respect to the load occurs. Therefore, when the amount of power generation has a surplus with respect to the load, the surplus power is stored in the battery, and when the amount of power generation is insufficient with respect to the load, the insufficient power is supplemented from the battery. Therefore, the battery used in such a power generation system is also controlled in an appropriate SOC range in order to efficiently receive surplus power and compensate for the shortage of power, similarly to the battery for a hybrid vehicle.
[0005]
Since the SOC control of the battery in the above-described system is important for enhancing the efficiency of the system, a method for detecting the SOC of the battery has been studied. By continuously monitoring the amount of discharged electricity and the amount of charged electricity as a method of detecting the SOC, the SOC of the battery at an arbitrary time can be estimated. However, the estimation error of the SOC increases due to the variation in the charging efficiency of the battery and the change over time in the charging efficiency.
[0006]
On the other hand, since there is a correlation between the SOC and the OCV in the lead storage battery, it is known to estimate the SOC of the storage battery based on the open circuit voltage (OCV) of the lead storage battery (for example, see Patent Document 1).
[0007]
However, in a lead-acid battery used in a hybrid vehicle, charging and discharging are switched at short time intervals according to the operating condition of the vehicle, and the time during which the battery is open is limited, which is inconvenient for frequent SOC detection. Was.
[0008]
Therefore, a method of estimating the SOC from a charging voltage value during charging or a discharging voltage value during discharging has been studied. However, when the control is performed within a relatively wide range of 50% to 95% SOC as in the case of a hybrid vehicle, it has been difficult to keep the estimation error of the SOC low.
[0009]
[Patent Document 1]
JP 2001-351698 A
[Problems to be solved by the invention]
The present invention provides an SOC detection method with a small detection error within a relatively wide SOC range of, for example, 50% to 95% in a power supply system such as a storage battery for a hybrid vehicle that controls the SOC within a predetermined range. Is what you do.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, an invention according to claim 1 of the present invention is a method for detecting the SOC in a power supply system in which a state of charge (SOC) of a storage battery is controlled within a predetermined SOC region. A first SOC region set near the lower limit of the SOC region; and a second SOC region set near the upper limit of the SOC region and not including the first SOC region. A step of determining whether the SOC is within the first SOC region or not in the first SOC region. And when the SOC is within the second SOC region, the SOC is detected by a second SOC detection method, and the first SOC detection method is the first SOC detection method. The SOC is detected based on a discharge current (Id) and a discharge voltage (Vd) of the battery, and the second SOC detection method detects the SOC based on a charge current (Ic) and a charge voltage (Vc) of the storage battery. This shows a method of detecting the state of charge of a storage battery, which is characterized by detecting.
[0012]
According to a second aspect of the present invention, in the method for detecting a state of charge of a storage battery according to the first aspect, the determination step is performed based on the SOC obtained by the first SOC detection method. It is.
[0013]
According to a third aspect of the present invention, in the method for detecting the state of charge of the storage battery according to the first aspect, the determination step is performed based on the SOC obtained by the second SOC detection method. Things.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
A method for detecting a state of charge of a storage battery according to an embodiment of the present invention will be described with reference to the drawings.
[0015]
1 and 2 are diagrams showing an example of transition of the state of charge (hereinafter referred to as SOC) of a storage battery in a power supply system to which the method for detecting the state of charge of a storage battery according to the present invention is applied. The SOC is controlled within the upper limit SOC (UL) and the lower limit SOC (LL). For example, when the SOC is controlled within the range of 50 to 95%, the SOC (UL) is 95% and the SOC (LL) is 50%.
[0016]
In the present invention, the first SOC region is set near the lower limit of the SOC, and the second SOC region is set near the upper limit of the SOC. For example, as shown in FIG. 1, SOC (LP) which is larger than SOC (LL) and smaller than SOC (UL) is set, and SOC (LL) ≦ SOC ≦ SOC (LP) is set to the first SOC region. Also, SOC (UP) which is equal to or more than SOC (LP) and equal to or less than SOC (UL) is set, and SOC (UP) ≦ SOC ≦ SOC (UL) is set as a second SOC region.
[0017]
Although it does not prevent SOC (LP) = SOC (UP) as shown in FIG. 2, in this case, the SOC (LP) value, that is, which SOC area the SOC (UP) value falls in is determined. It must be defined in advance. In the present embodiment, SOC (LP) = SOC (UP), SOC (LL) ≦ SOC ≦ SOC (UP) is in the first SOC region, and SOC (UP) <SOC ≦ SOC (UL) is in the second SOC region. An example in which the SOC region is set will be described.
[0018]
3 and 4 are diagrams showing a flow of a method of detecting a state of charge (SOC) of a storage battery according to an embodiment of the present invention. After the start of the SOC detection (S1), it is determined whether the storage battery is in a discharged state (S2). If the storage battery is not in the discharge state, the discharge determination (S2) is performed after waiting for a predetermined time. This discharge determination (S2) detects the current flowing through the storage battery, and this can be determined from the sign of the current value.
[0019]
When the storage battery is in the discharging state, measurement of the discharge current (Id) of the storage battery (S3) and measurement of the discharge voltage (Vd) (S4) are performed. Next, the SOC of the storage battery is determined from the values of Vd and Id obtained here. The SOC obtained from the relationship between the voltage (Vd) and the current (Id) at the time of this discharge is defined as SOC1 (S5). Here, a data string of the Vd-Id value is obtained for each storage battery in advance for each SOC, and this data string is stored in a storage unit such as a memory. Then, SOC1 is obtained by referring to this data string from the actually measured values of the Vd value and the Id value. Here, if the data string is obtained for each storage battery temperature, SOC1 can be measured more accurately. Since Vd changes after the start of discharge, the measurement timing of Vd after the start of discharge needs to be performed within a predetermined time.
[0020]
Next, a step (S6) of determining whether SOC1 is in the first SOC region near the lower limit or in the second SOC region near the upper limit is performed. If SOC1 is within the first SOC region, that is, SOC (LL) ≦ SOC ≦ SOC (UP) (YES), the value of SOC1 is output as the SOC of the storage battery (S7). When SOC1 is outside the first SOC region, that is, inside the second SOC region, the process proceeds to the step (S8) of performing the charge determination shown in FIG.
[0021]
In the charging determination step (S8), it is determined whether or not the storage battery is being charged. If the storage battery is discharging or the charging / discharging current is 0 and the circuit is substantially in an open state, the process returns to the charging determination step (S8) after a predetermined time.
[0022]
If the storage battery is being charged in the charging determination step (S8), the charging current (Ic) and the charging voltage (Vc) at this time are measured in steps (S9) and (S10), respectively. Then, the SOC of the storage battery is obtained from the obtained values of Vc and Ic, and is set as SOC2 (S11). The relationship between Vc and Ic and the SOC is stored in a storage means such as a memory in advance for each storage battery used, and after measuring Vc and Ic, the SOC2 is back-calculated with reference to these data sequences. I do. Here, if a data string is obtained for each storage battery temperature, SOC2 can be measured more accurately. The obtained SOC2 is output as the SOC of the storage battery (S12).
[0023]
In the present invention, the SOC measurement method is changed depending on the SOC value. In the region where the SOC is about 80% or less, the method of calculating the SOC from the relationship between the current (Id) and the voltage (Vd) during discharging is compared with the method of calculating the SOC from the relationship between the current (Ic) and the voltage (Vc) during charging. Thus, the SOC can be accurately detected. Further, when the SOC is close to the upper limit of 95%, the method of obtaining the SOC from the relationship between the current (Ic) and the voltage (Vc) during charging requires that the current (Id) and the voltage (Vd) during discharging be obtained more accurately. It is possible.
[0024]
According to the present invention, the SOC measurement accuracy can be improved by detecting which SOC region the SOC of the storage battery is in and selecting an SOC detection method suitable for the SOC region. In this embodiment, as shown in FIG. 2, SOC (UP) = SOC (LP) is set so that the first SOC region and the second SOC region are in contact with each other. As described above, SOC (UP)> SOC (LP), and it is also possible to provide a third SOC region which does not belong to either of the first SOC region and the second SOC region. When a method based on a discharge voltage and a discharge current similar to that of the first SOC region is employed in the third region, it is substantially the same as the above-described embodiment of the present invention. Alternatively, an average value of the SOC (SOC1) obtained from the discharge voltage and the discharge current and the SOC (SOC2) obtained from the charge voltage and the charge voltage can be used.
[0025]
In the present invention, since the SOC is obtained from the current-voltage relationship of the storage battery, if the present invention is applied to a storage battery having a relatively strong correlation between these relationships, for example, a lead storage battery or a lithium secondary battery, the detection accuracy of the SOC can be improved. Can be enhanced.
[0026]
【The invention's effect】
As described above, according to the method of detecting the state of charge (SOC) of a storage battery according to the present invention, the SOC can be accurately detected in a relatively wide SOC range of, for example, 50% to 95%, and the SOC control is required. It is extremely useful industrially because the control accuracy of the power supply system can be improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing an SOC transition of a storage battery; FIG. 2 is a diagram showing an SOC transition of a storage battery; FIG. 3 is a diagram showing a part of a flow of a state-of-charge detection method according to an embodiment of the present invention; The figure which shows a part of flow of the state-of-charge detection method by the embodiment of the invention.
Claims (3)
前記ＳＯＣ領域の下限近傍に設定される第１のＳＯＣ領域と、
前記ＳＯＣ領域の上限近傍に設定され、かつ前記第１のＳＯＣ領域を含まない第２のＳＯＣ領域を設定し、
前記ＳＯＣが前記第１のＳＯＣ領域内か前記第２のＳＯＣ領域内かを判定する判定ステップを有し、
前記ステップにおいて前記ＳＯＣが前記第１のＳＯＣ領域内である場合には、前記ＳＯＣを第１のＳＯＣ検知方法によって検知するとともに、
前記ＳＯＣが前記第２のＳＯＣ領域内である場合には、前記ＳＯＣを第２のＳＯＣ検知方法によって検知し、
前記第１のＳＯＣ検知方法は前記蓄電池の放電電流（Ｉｄ）と放電電圧（Ｖｄ）に基いて前記ＳＯＣを検知し、
前記第２のＳＯＣ検知方法は前記蓄電池の充電電流（Ｉｃ）と充電電圧（Ｖｃ）に基いて前記ＳＯＣを検知することを特徴とする蓄電池の充電状態検知方法。A method of detecting a state of charge in a power supply system in which a state of charge (SOC) of a storage battery is controlled within a predetermined SOC region,
A first SOC region set near a lower limit of the SOC region;
Setting a second SOC region that is set near the upper limit of the SOC region and that does not include the first SOC region;
A determining step of determining whether the SOC is within the first SOC region or the second SOC region;
When the SOC is within the first SOC region in the step, the SOC is detected by a first SOC detection method,
When the SOC is within the second SOC region, the SOC is detected by a second SOC detection method,
The first SOC detection method detects the SOC based on a discharge current (Id) and a discharge voltage (Vd) of the storage battery,
The second SOC detection method is a method of detecting a state of charge of a storage battery, wherein the SOC is detected based on a charging current (Ic) and a charging voltage (Vc) of the storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003080306A JP4165268B2 (en) | 2003-03-24 | 2003-03-24 | Battery charge state detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003080306A JP4165268B2 (en) | 2003-03-24 | 2003-03-24 | Battery charge state detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004286642A true JP2004286642A (en) | 2004-10-14 |
| JP4165268B2 JP4165268B2 (en) | 2008-10-15 |
Family
ID=33294202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003080306A Expired - Fee Related JP4165268B2 (en) | 2003-03-24 | 2003-03-24 | Battery charge state detection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4165268B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007050833A (en) * | 2005-08-19 | 2007-03-01 | Toyota Motor Corp | Battery state estimation device for vehicle |
| US7345452B2 (en) | 2004-12-21 | 2008-03-18 | Hyundai Motor Company | Method of calculating SOC of battery for prevention of memory effect |
| JP2010019845A (en) * | 2008-07-10 | 2010-01-28 | Commissariat A L'energie Atomique | Determination method of state of charge of battery in charging or discharging phase at constant current |
| WO2011039912A1 (en) | 2009-09-30 | 2011-04-07 | 新神戸電機株式会社 | Storage battery device, storage battery state of charge evaluation device and method |
| JP2012064426A (en) * | 2010-09-16 | 2012-03-29 | Sony Corp | Battery pack and inspection method for secondary battery storage state therein |
| US10120032B2 (en) | 2012-03-13 | 2018-11-06 | Primearth Ev Energy Co., Ltd. | Device and method for estimating secondary cell status |
| CN116500475A (en) * | 2023-04-28 | 2023-07-28 | 江苏果下科技有限公司 | Energy storage acquisition method and system with real-time SOC correction compensation |
-
2003
- 2003-03-24 JP JP2003080306A patent/JP4165268B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7345452B2 (en) | 2004-12-21 | 2008-03-18 | Hyundai Motor Company | Method of calculating SOC of battery for prevention of memory effect |
| JP4577151B2 (en) * | 2005-08-19 | 2010-11-10 | トヨタ自動車株式会社 | Vehicle battery state estimation device |
| JP2007050833A (en) * | 2005-08-19 | 2007-03-01 | Toyota Motor Corp | Battery state estimation device for vehicle |
| JP2010019845A (en) * | 2008-07-10 | 2010-01-28 | Commissariat A L'energie Atomique | Determination method of state of charge of battery in charging or discharging phase at constant current |
| US10209313B2 (en) | 2009-09-30 | 2019-02-19 | Hitachi Chemical Company, Ltd. | Accumulator device, and state of charge evaluation apparatus and method for accumulator |
| WO2011039912A1 (en) | 2009-09-30 | 2011-04-07 | 新神戸電機株式会社 | Storage battery device, storage battery state of charge evaluation device and method |
| CN102124360A (en) * | 2009-09-30 | 2011-07-13 | 新神户电机株式会社 | Storage battery device, storage battery state of charge evaluation device and method |
| EP2490034A1 (en) * | 2009-09-30 | 2012-08-22 | Shin-Kobe Electric Machinery Co., Ltd. | Storage battery device, storage battery state of charge evaluation device and method |
| EP2490034A4 (en) * | 2009-09-30 | 2013-05-01 | Shin Kobe Electric Machinery | Storage battery device, storage battery state of charge evaluation device and method |
| JP2012064426A (en) * | 2010-09-16 | 2012-03-29 | Sony Corp | Battery pack and inspection method for secondary battery storage state therein |
| US10120032B2 (en) | 2012-03-13 | 2018-11-06 | Primearth Ev Energy Co., Ltd. | Device and method for estimating secondary cell status |
| CN116500475A (en) * | 2023-04-28 | 2023-07-28 | 江苏果下科技有限公司 | Energy storage acquisition method and system with real-time SOC correction compensation |
| CN116500475B (en) * | 2023-04-28 | 2023-11-10 | 江苏果下科技有限公司 | Energy storage acquisition method and system with real-time SOC correction compensation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4165268B2 (en) | 2008-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3664247B1 (en) | Charging time computation method and charge control device | |
| JP3878150B2 (en) | Charge state algorithm for lead acid battery in hybrid electric vehicle | |
| JP3571026B2 (en) | Pseudo-adaptive method and system for determining state of charge of battery | |
| US6356083B1 (en) | State of charge algorithm for a battery | |
| US7355411B2 (en) | Method and apparatus for estimating state of charge of secondary battery | |
| JP4157317B2 (en) | Status detection device and various devices using the same | |
| EP1265335B1 (en) | Method and apparatus for controlling residual battery capacity of secondary battery | |
| US9475480B2 (en) | Battery charge/discharge control device and hybrid vehicle using the same | |
| US8655524B2 (en) | Power supply system, vehicle provided with the same and control method of power supply system | |
| US6700383B2 (en) | Method of detecting and resolving memory effect | |
| JP5862836B2 (en) | Battery system | |
| JP6668905B2 (en) | Battery deterioration estimation device | |
| US8054046B2 (en) | Fast search algorithm for finding initial diffusion voltage in electro-chemical systems | |
| JP2000166109A (en) | Charged state detecting device for battery | |
| JP2009042176A (en) | Electromotive vehicle | |
| JP2014126411A (en) | Secondary battery state estimation device and control device | |
| JP6672743B2 (en) | Full charge capacity calculation device, computer program, and full charge capacity calculation method | |
| JP2004056937A (en) | Electricity accumulation system | |
| CN102713653A (en) | Secondary battery charging reception limit detecting method and device using same | |
| JP2009210478A (en) | Estimation method for chargeable/dischargeable power of battery | |
| JPH08503307A (en) | How to estimate the residual charge of a storage battery | |
| JP2014202630A (en) | Battery system | |
| JP2003243042A (en) | Detecting method and device for degree of deterioration of lithium battery as component of package battery | |
| JP4165268B2 (en) | Battery charge state detection method | |
| JP2004022322A (en) | Remaining capacity estimation apparatus and remaining capacity estimation method of secondary battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20051202 |
|
| RD01 | Notification of change of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7421 Effective date: 20060112 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20080528 |
|
| 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: 20080708 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20080721 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110808 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110808 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120808 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130808 Year of fee payment: 5 |
|
| LAPS | Cancellation because of no payment of annual fees |