JP2001078365A - Battery capacity measuring apparatus - Google Patents
Battery capacity measuring apparatusInfo
- Publication number
- JP2001078365A JP2001078365A JP25563299A JP25563299A JP2001078365A JP 2001078365 A JP2001078365 A JP 2001078365A JP 25563299 A JP25563299 A JP 25563299A JP 25563299 A JP25563299 A JP 25563299A JP 2001078365 A JP2001078365 A JP 2001078365A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- current
- full charge
- offset
- offset error
- 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]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
-
- 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
- G01R31/3828—Arrangements for monitoring battery or accumulator variables, e.g. SoC using current integration
-
- 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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Electric Status Of Batteries (AREA)
- Control Of Charge By Means Of Generators (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は車両用のバッテリの
バッテリ容量計測装置に関し、特に計測精度の向上に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring a battery capacity of a battery for a vehicle, and more particularly to an improvement in measurement accuracy.
【０００２】[0002]
【従来の技術】車両に搭載されるバッテリはエンジンの
スタータやその他の補機の電源として用いられ、内燃機
関の動力で作動する発電機により適宜、充電される。バ
ッテリ容量計測装置はバッテリの現在の容量を求めるも
ので、検出されたバッテリ容量に基づいて発電機が制御
される。特開平６−３５１１６６号公報には、バッテリ
が満充電に近いときには調整電圧を低くして過充電とな
らないようにするとともに低燃費で発電ができるように
し、容量不足のときは調整電圧を高くして過放電となら
ないようにすることで、負荷の消費電力に応じた適正な
容量を低燃費で確保するとともに、過充電、過放電によ
るバッテリの劣化を防止する技術が開示されている。こ
こではバッテリ容量は電流センサにより得られたバッテ
リの充放電電流の積算値に基づいて算出している。2. Description of the Related Art A battery mounted on a vehicle is used as a power source for a starter of an engine and other auxiliary devices, and is appropriately charged by a generator operated by the power of an internal combustion engine. The battery capacity measuring device obtains the current capacity of the battery, and the generator is controlled based on the detected battery capacity. Japanese Patent Application Laid-Open No. Hei 6-351166 discloses that when the battery is near full charge, the adjustment voltage is lowered to prevent overcharging and to enable power generation with low fuel consumption, and when the capacity is insufficient, the adjustment voltage is increased. A technique has been disclosed in which a proper capacity according to the power consumption of a load is ensured at low fuel consumption by preventing overdischarge by preventing the battery from being deteriorated due to overcharge and overdischarge. Here, the battery capacity is calculated based on the integrated value of the charge / discharge current of the battery obtained by the current sensor.
【０００３】バッテリの充放電電流の積算値からバッテ
リ容量を算出するものでは、電流センサの検出精度が重
要である。特に検出電流値にオフセット誤差が含まれて
いると、現在のバッテリ容量を算出するときにオフセッ
ト誤差は積算するのでバッテリの充電制御を適正に行う
ことが困難となる。このオフセット誤差は一般的には回
路がオープンの時に電流を検出することで得ることがで
きるが、車両においてはエンジン停止時も時計等の補機
は給電状態にあるため回路を完全にオープンにして電流
を検出することは困難である。そこで、エンジン停止時
の暗電流を予め見積もっておきその分を除いてオフセッ
ト誤差を得る方法がある。In calculating battery capacity from the integrated value of battery charge / discharge current, the detection accuracy of the current sensor is important. In particular, if an offset error is included in the detected current value, the offset error is integrated when calculating the current battery capacity, so that it is difficult to properly perform battery charge control. This offset error can generally be obtained by detecting the current when the circuit is open.However, in a vehicle, even when the engine is stopped, auxiliary equipment such as a clock is in a power supply state, so the circuit must be completely open and It is difficult to detect the current. Therefore, there is a method of estimating a dark current when the engine is stopped in advance and obtaining an offset error by excluding the estimated dark current.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、エンジ
ン停止時の暗電流は補機の使用形態や種類により差があ
り必ずしも適正にエンジン停止時の暗電流を見積もるこ
とはできず、却って充放電電流の検出誤差が増大するお
それもある。However, the dark current when the engine is stopped varies depending on the use form and type of the auxiliary equipment, and it is not always possible to properly estimate the dark current when the engine is stopped. The detection error may increase.
【０００５】本発明は上記実情に鑑みなされたもので、
計測精度のよいバッテリ容量計測装置を提供することを
目的とする。[0005] The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a battery capacity measuring device with good measurement accuracy.
【０００６】[0006]
【課題を解決するための手段】請求項１記載の発明で
は、バッテリが満充電にあることを検出する満充電検出
手段と、満充電時からその後の満充電時までの期間に電
流センサの検出電流を積算する検出電流積算手段と、検
出電流積算手段により得られた検出電流積算値を上記期
間の長さで除する除算手段と、除算手段により得られた
除数値により検出電流をオフセット補正する補正手段と
を具備する構成とする。According to the first aspect of the present invention, a full charge detecting means for detecting that the battery is fully charged, and a detection of the current sensor during the period from the time of full charge to the time of full charge thereafter. Detection current integration means for integrating current, division means for dividing the detection current integration value obtained by the detection current integration means by the length of the period, and offset correction of the detection current by the divisor value obtained by the division means And a correcting means.
【０００７】満充電時には容量を示すＳＯＣ（Ｓｔａｔ
ｅ Ｏｆ Ｃｈａｒｇｅ）が前の満充電時と同じ１００
％の状態に復しており、前の満充電時から今回の満充電
時に到る期間には同量の放電と充電とが行われている。
したがって、前の満充電時から今回の満充電時に到る期
間において積算された検出電流の積算値には電流センサ
のオフセット誤差成分のみが含まれている。この検出電
流積算値を積算期間である上記期間の長さで除すること
で、上記エンジンスタータ等のバッテリ負荷の使用形態
等の影響を受けずにオフセット誤差が得られ、正確なバ
ッテリの充放電電流を知ることができる。しかして、バ
ッテリ容量を高精度に計測することができる。When the battery is fully charged, the SOC (Stat) indicating the capacity is
e Of Charge) is the same as the previous full charge of 100
%, And the same amount of discharge and charge is performed during the period from the previous full charge to the current full charge.
Therefore, the integrated value of the detected current integrated during the period from the previous full charge to the current full charge includes only the offset error component of the current sensor. By dividing the detected current integrated value by the length of the period, which is the integration period, an offset error can be obtained without being affected by the usage form of the battery load such as the engine starter and the like, and accurate charging and discharging of the battery can be achieved. You can know the current. Thus, the battery capacity can be measured with high accuracy.
【０００８】請求項２記載の発明では、前回の満充電時
から所定時間経過すると上記発電機を制御して上記バッ
テリを満充電にする満充電手段を具備せしめる。According to the second aspect of the present invention, there is provided a full charge means for controlling the generator to fully charge the battery when a predetermined time has elapsed since the last full charge.
【０００９】所定時間経過するとバッテリが満充電状態
になるので、略一定間隔でオフセット誤差を見直すこと
ができ、さらに高精度にバッテリ容量を計測することが
できる。Since the battery is fully charged after a predetermined period of time, the offset error can be reviewed at substantially constant intervals, and the battery capacity can be measured with higher accuracy.
【００１０】[0010]
【発明の実施の形態】図１に本発明のバッテリ容量計測
装置の構成を示す。本バッテリ容量計測装置１が付設さ
れるバッテリ５には発電機６が接続され、発電機６によ
り充電可能としてある。発電機６は図示しない機関動力
により作動する。バッテリ５にはエンジンスタータ等の
負荷７が接続される。FIG. 1 shows the configuration of a battery capacity measuring apparatus according to the present invention. A generator 6 is connected to the battery 5 to which the battery capacity measuring device 1 is attached, and can be charged by the generator 6. The generator 6 operates with engine power (not shown). A load 7 such as an engine starter is connected to the battery 5.
【００１１】バッテリ容量計測装置１は、バッテリ５か
ら発電機６および負荷７に到るケーブルの途中に、バッ
テリ５の充放電電流を監視するための電流センサ２が設
けてある。The battery capacity measuring device 1 is provided with a current sensor 2 for monitoring the charge / discharge current of the battery 5 in the middle of a cable extending from the battery 5 to the generator 6 and the load 7.
【００１２】電流センサ２の検出信号を入力としてマイ
クロコンピュータ３が設けてあり、電流センサ２から得
られるバッテリ５の充放電電流に基づいてバッテリ５の
現在の容量を演算する。マイクロコンピュータ３はＣＰ
Ｕ、メモリ（ＲＡＭ、ＲＯＭ）を備えた一般的な構成の
ものが用いられ得る。A microcomputer 3 is provided with a detection signal of the current sensor 2 as an input, and calculates a current capacity of the battery 5 based on a charging / discharging current of the battery 5 obtained from the current sensor 2. The microcomputer 3 is a CP
U and a general configuration having a memory (RAM, ROM) may be used.
【００１３】マイクロコンピュータ３は発電機６の制御
用と兼用で、調整電圧の指令値を発電機６に出力し励磁
電流を加減して発電機６の発電量を制御する。The microcomputer 3 is also used for controlling the generator 6, and outputs a command value of an adjustment voltage to the generator 6 to control the amount of power generated by the generator 6 by adjusting the excitation current.
【００１４】マイクロコンピュータ３には、そのＣＰＵ
上で実行される検出電流積算手段３１、除算手段３２、
補正手段３３とを備えており、電流センサ２の検出電流
からバッテリ５の充放電電流が知られるようになってい
る。また、マイクロコンピュータ３には、そのＣＰＵ上
で実行される満充電手段３４を備えており、所定条件が
整ったときに調整電圧を高く設定することで発電量を増
加し、バッテリ５を満充電にする。The microcomputer 3 has its CPU
The detected current integrating means 31, dividing means 32 executed above,
A correction means 33 is provided so that the charge / discharge current of the battery 5 is known from the detection current of the current sensor 2. The microcomputer 3 is provided with a full charge means 34 executed on the CPU. When a predetermined condition is satisfied, the regulated voltage is set high to increase the amount of power generation and fully charge the battery 5. To
【００１５】また、本バッテリ容量計測装置１は満充電
判定回路４を備えており、バッテリ５が満充電になると
その旨の判定信号をマイクロコンピュータ３に出力し、
バッテリが満充電状態か否かがマイクロコンピュータ３
において知られるようになっている。満充電判定回路４
はバッテリ５の端子間電圧を検出しそれが大きく上昇す
ると満充電と判定するものや、ＮｉＨ電池等ではその温
度、例えば表面温度を検出しそれが上昇すると満充電と
判定するものや、発電機６の励磁電流のオンオフ頻度を
検出しそれが多くなると満充電と判定するもの等、種々
の公知の技術が用いられ得る。Further, the battery capacity measuring device 1 includes a full charge determination circuit 4, and when the battery 5 is fully charged, outputs a determination signal to that effect to the microcomputer 3.
The microcomputer 3 determines whether or not the battery is fully charged.
It has become known in. Full charge judgment circuit 4
A battery that detects the voltage between terminals of the battery 5 and determines that the battery is fully charged when the voltage rises significantly; a NiH battery or the like that detects its temperature, for example, the surface temperature, and determines that the battery is fully charged when the temperature rises; Various known techniques can be used, such as a technique of detecting the on / off frequency of the excitation current in No. 6 and determining that the charge is full when the frequency increases.
【００１６】図２にマイクロコンピュータ３で実行され
る制御フローを示す。本制御フローはキースイッチがオ
ンしエンジンが始動すると立ち上がるようになってい
る。ステップＳ００１では、先回の制御フロー終了時に
マイクロコンピュータ３のメモリに記憶したＱ，ＳＯＣ
を読み出す。また、Ｉcor を読み出す。FIG. 2 shows a control flow executed by the microcomputer 3. This control flow starts when the key switch is turned on and the engine is started. In step S001, the Q, SOC stored in the memory of the microcomputer 3 at the end of the previous control flow.
Is read. Further, I cor is read.
【００１７】ステップＳ００２は補正手段３３としての
手順で、電流センサ２の検出電流Ｉ measを読み込み式
（１）によりバッテリ充放電電流Ｉを算出する。バッテ
リ充放電電流Ｉは、式（１）より知られるように検出電
流Ｉmeasを補正値Ｉcor によりオフセット補正すること
で得られる。補正値Ｉcor は後述するステップＳ００８
で算出され更新される。 Ｉ＝Ｉmeas−Ｉcor ・・・（１）In step S002, the correcting means 33
In the procedure, the detection current I of the current sensor 2 is measRead formula
The battery charge / discharge current I is calculated according to (1). Batte
The recharge / discharge current I is, as known from the equation (1),
Style ImeasTo the correction value IcorOffset correction by
Is obtained. Correction value IcorIs a step S008 to be described later.
Is calculated and updated. I = Imeas-Icor... (1)
【００１８】続くステップＳ００３は検出電流積算手段
３１としての手順で、式（２）により検出電流Ｉmeasの
積算値Ｑを演算する。なお、式中、ｔは計測間隔であ
る。また、Ｑは前回の満充電時に０に初期化されている
（後述するステップＳ００７参照）。 Ｑ＝Ｑ＋Ｉmeas×ｔ・・・（２）The following step S003 is a procedure as the detected current integrating means 31, which calculates the integrated value Q of the detected current I meas by equation (2). In the equation, t is a measurement interval. Q has been initialized to 0 at the time of the previous full charge (see step S007 described later). Q = Q + I meas × t (2)
【００１９】ステップＳ００４では式（３）によりＳＯ
Ｃを演算する。なお、式中、ＣはＳＯＣ１００％に対応
する満充電時のバッテリ５の容量である。このＳＯＣは
従来と同様に発電機６の制御に供される。 ＳＯＣ＝ＳＯＣ＋Ｉ×ｔ×１００／Ｃ・・・（３）In step S004, the SO
Calculate C. In the expression, C is the capacity of the battery 5 at the time of full charge corresponding to SOC 100%. This SOC is used for controlling the generator 6 as in the conventional case. SOC = SOC + I × t × 100 / C (3)
【００２０】ステップＳ００５ではバッテリ５が満充電
か否かを判定する。この判定は満充電判定回路からの判
定信号に基づき行う。In step S005, it is determined whether the battery 5 is fully charged. This determination is made based on a determination signal from the full charge determination circuit.
【００２１】満充電でなければ後述するステップＳ００
６，Ｓ００７，Ｓ００８はスキップしてステップＳ００
９に進み、先回満充電と判定された時から所定時間以上
経過したか否かを内蔵のタイマのカウント値から判定す
る。If the battery is not fully charged, a step S00 to be described later is performed.
6, S007 and S008 are skipped and step S00
The program proceeds to 9 to determine whether or not a predetermined time has elapsed from the time of the previous full charge determination based on the count value of the built-in timer.
【００２２】先回満充電判定時から所定時間以上経過し
ていなければ後述するステップＳ０１０はスキップして
ステップＳ０１１に進み、キースイッチがオフされてい
るか否かを判定する。If the predetermined time has not elapsed since the last full charge determination, step S010 to be described later is skipped and the process proceeds to step S011, where it is determined whether the key switch is turned off.
【００２３】キースイッチがオンであればステップＳ０
０２に戻る。すなわちエンジンが運転状態にあり満充電
と判定されるまで上記ステップＳ００２〜Ｓ００４が繰
り返され、検出電流積算値ＱおよびＳＯＣが更新されて
ゆくことになる。If the key switch is on, step S0
Return to 02. That is, steps S002 to S004 are repeated until the engine is in the operating state and it is determined that the engine is fully charged, and the detected current integrated value Q and the SOC are updated.
【００２４】なお、キースイッチがオフになると、ステ
ップＳ０１１からステップＳ０１２に進み、上記ステッ
プＳ００３，Ｓ００４で算出した検出電流積算値Ｑおよ
びＳＯＣをメモリに保存して次回の本制御フロー立ち上
がり時に備える。When the key switch is turned off, the process proceeds from step S011 to step S012, in which the detected current integrated value Q and SOC calculated in steps S003 and S004 are stored in a memory to prepare for the next startup of the present control flow.
【００２５】また、エンジン停止期間中は、コンピュー
タはタイマー制御によるスリープモードで作動し、定期
的に起動して上記ステップＳ００１〜Ｓ００４，Ｓ０１
２と同様の手順を実行し検出電流積算値ＱおよびＳＯＣ
の算出を行う。During the engine stop period, the computer operates in the sleep mode under the control of the timer, and periodically starts up to execute the above steps S001 to S004 and S01.
2 and the detected current integrated value Q and SOC
Is calculated.
【００２６】そして先回満充電判定時から所定時間以上
経過するとステップＳ００９からステップＳ０１０に進
む。ステップＳ０１０は満充電手段３４としての手順
で、上記調整電圧を高く設定し発電機６の発電量を所定
量まで増加する。これによりバッテリ５は満充電とな
り、ステップＳ００５に続いて上記ステップＳ００６，
Ｓ００７，Ｓ００８を実行する。When a predetermined time or more has passed since the last full charge determination, the process proceeds from step S009 to step S010. Step S010 is a procedure as the full charge means 34, in which the adjustment voltage is set high and the power generation amount of the generator 6 is increased to a predetermined amount. As a result, the battery 5 is fully charged.
Steps S007 and S008 are executed.
【００２７】ステップＳ００６ではＳＯＣを初期値であ
る１００％に更新する。満充電となっているからであ
る。In step S006, the SOC is updated to the initial value of 100%. This is because the battery is fully charged.
【００２８】続くステップＳ００７は除算手段３２とし
ての手順で、上記タイマによりカウントされた先回満充
電判定時からの時間Ｔを読み込み、式（４）により電流
センサ２のオフセット誤差Ｉoffsetを求める。なおＱは
オフセット誤差Ｉoffset算出後に初期値である０に更新
する。The following step S007 is a procedure as the dividing means 32, in which the time T counted from the previous full charge determination counted by the timer is read, and the offset error I offset of the current sensor 2 is obtained by equation (4). Note that Q is updated to the initial value of 0 after calculating the offset error I offset .
【００２９】Ｉoffset＝Ｑ／Ｔ・・・（４）I offset = Q / T (4)
【００３０】ステップＳ００８ではこのオフセット値Ｉ
offsetに基づき式（５）により上記補正値Ｉcor を更新
する。 Ｉcor ＝Ｉoffset・・・（５）In step S008, the offset value I
The correction value I cor is updated by the equation (5) based on the offset . I cor = I offset (5)
【００３１】なお、バッテリ５が満充電になると調整電
圧をバッテリ５の起電圧と同等かやや低くし、ＳＯＣを
所定のレベルに維持する。When the battery 5 is fully charged, the regulated voltage is made equal to or slightly lower than the electromotive voltage of the battery 5, and the SOC is maintained at a predetermined level.
【００３２】次に、かかる電流センサの検出電流Ｉmeas
をオフセット誤差Ｉoffsetにより補正してバッテリ充放
電電流Ｉを得るようにした効果を説明する。図３は補正
を行わずに電流センサの検出電流をそのままバッテリ充
放電電流として用いる従来の装置における、算出したＳ
ＯＣの経時変化で、電流センサ２の検出電流の積算値に
応じてＳＯＣの算出値が初期値１００％から変化する様
子を示している。Ａ点はバッテリの充電が行われて再び
満充電となった時点であり、ここではバッテリの状態は
前回の満充電時から今回の満充電時までの期間に同じ量
の放電と充電とが行われて前回の満充電状態のときと同
じ状態に復している。したがって、電流センサがバッテ
リ電流の真値を示していれば図示のごとくＳＯＣは再び
１００％となる。Next, the detection current I meas of the current sensor
Is corrected by the offset error I offset to obtain the battery charge / discharge current I. FIG. 3 shows the calculated S in a conventional device using the detection current of the current sensor as it is as the battery charging / discharging current without correction.
This shows how the calculated value of the SOC changes from the initial value of 100% in accordance with the change over time of the OC, according to the integrated value of the detection current of the current sensor 2. Point A is a point in time when the battery is charged and becomes fully charged again. Here, the state of the battery is such that the same amount of discharge and charging is performed during the period from the previous full charge to the current full charge. It has returned to the same state as the previous fully charged state. Therefore, if the current sensor indicates the true value of the battery current, the SOC becomes 100% again as shown in the figure.
【００３３】しかし、電流センサに正のオフセット誤差
Ｉoffset1 があると、算出したＳＯＣはこのオフセット
誤差Ｉoffset1 が積算し図示のごとく正側にずれる（Ｓ
ＯＣ1 ）。このずれは前の満充電時から今回（Ａ点）の
満充電時までの時間Ｔ1 の間のオフセット誤差Ｉ
offset1 の積算値のバッテリの容量Ｃに対する割合とな
るから、式（６）のように表せる。 ＳＯＣ1 −１００（％）＝Ｔ1 ×Ｉoffset1 ／Ｃ×１００（％）・・・（６）[0033] However, if the current sensor has a positive offset error I offset1, calculated SOC is shifted to the positive side as shown by integrating this offset error I offset1 (S
OC1). This shift is caused by the offset error I during the time T1 from the previous full charge to the current (point A) full charge.
Since it is the ratio of the integrated value of offset1 to the capacity C of the battery, it can be expressed as in equation (6). SOC1-100 (%) = T1 * I offset1 / C * 100 (%) (6)
【００３４】また、電流センサに負のオフセット誤差Ｉ
offset2 があると、算出したＳＯＣはこのオフセット誤
差Ｉoffset2 が積算し図示のごとく負側にずれる（ＳＯ
Ｃ2）。このずれは前の満充電時から今回（Ａ点）の満
充電時までの時間Ｔ1 の間のオフセット誤差Ｉoffset2
の積算値のバッテリの容量Ｃに対する割合となるから、
式（７）のように表せる。 ＳＯＣ2 −１００（％）＝Ｔ1 ×Ｉoffset2 ／Ｃ×１００（％）・・・（７）The current sensor has a negative offset error I
If there is offset2, calculated SOC is shifted to the negative side as shown by integrating this offset error I offset2 (SO
C2). This deviation is caused by the offset error I offset2 during the time T1 from the previous full charge to the current (point A) full charge.
Is the ratio of the integrated value to the capacity C of the battery.
It can be expressed as in equation (7). SOC2-100 (%) = T1 * I offset2 / C * 100 (%) (7)
【００３５】さて、上記のごとく、前回の満充電時から
今回満充電となるまでに放電と同量の充電が行われてバ
ッテリの状態は前回の満充電状態のときと同様の状態に
復しているから、検出電流積算値のうち、実際の放電成
分および充電成分は相殺する。したがって、上記Ｔ1 ×
Ｉoffset1 、Ｔ1 ×Ｉoffset2 は前の満充電から今回の
満充電までの間の検出電流Ｉmeasの積算値に等しい。し
かして、上記式（４）により検出電流積算値Ｑをその積
算期間である前回の満充電時から今回の満充電時までの
期間の長さＴで除することで負荷７の使用形態等の影響
を受けることなくオフセット誤差Ｉoffsetが求められ
る。そして、式（５）により、オフセット誤差Ｉoffset
が相殺するように検出電流Ｉmeasが補正されて正確なバ
ッテリ充放電電流Ｉが知られるので、高精度にＳＯＣを
計測することができる。As described above, the same amount of charge as the discharge is performed from the time of the previous full charge to the time of the full charge this time, and the state of the battery is restored to the same state as in the previous full charge state. Therefore, of the detected current integrated value, the actual discharge component and charge component cancel each other. Therefore, the above T1 ×
I offset1 and T1 × I offset2 are equal to the integrated value of the detection current I meas from the previous full charge to the current full charge. Thus, by dividing the detected current integrated value Q by the above expression (4) by the length T of the period from the last full charge to the current full charge, which is the integration period, the use form of the load 7 can be determined. The offset error I offset is obtained without being affected. Then, according to equation (5), the offset error I offset
, The detection current I meas is corrected so that the accurate battery charge / discharge current I is known, so that the SOC can be measured with high accuracy.
【００３６】なお、本実施形態では、オフセット補正値
Ｉcor は満充電時に得られたオフセット誤差Ｉoffsetと
している（式（５））が、式（８）に示すように今回の
満充電までのオフセット補正値Ｉcor と新たに算出され
たオフセット誤差Ｉoffsetとの重み付き平均を算出し、
これをオフセット補正値Ｉcor としてもよい。なお式
中、ａは重みである（０＜ａ＜１）。 Ｉcor ＝ａ×Ｉoffset＋（１−ａ）×Ｉcor ・・・（８）In this embodiment, the offset correction value I cor is the offset error I offset obtained when the battery is fully charged (Equation (5)). Calculating a weighted average of the offset correction value I cor and the newly calculated offset error I offset ;
This may be used as the offset correction value I cor . In the expression, a is a weight (0 <a <1). I cor = a × I offset + (1−a) × I cor (8)
【００３７】また、過去数回の満充電時におけるオフセ
ット誤差Ｉoffsetを平均してこれをオフセット補正値Ｉ
cor としてもよい。あるいはオフセット誤差を求める検
出電流の積算期間を、直近の満充電時から今回の満充電
時までとするのではなく、満充電時から１回以上の満充
電状態を経た後の満充電時までとし、この間の検出電流
を積算してもよい。Further, the offset errors I offset during the last several full charges are averaged and this is used as the offset correction value I.
It may be cor . Alternatively, the integration period of the detection current for obtaining the offset error is not from the time of the most recent full charge to the time of this full charge, but from the time of full charge to the time of full charge after passing through one or more full charge states. , The detected current during this period may be integrated.
【００３８】また、本実施形態では、前の満充電時から
所定時間が経過すると強制的に発電機６の発電量が増加
してバッテリ５を満充電する構成となっているが、前の
満充電から今回の満充電に到る期間の検出電流積算値お
よび上記期間の長さが得られる構成であれば、本実施形
態の構成に限られるものではない。Further, in the present embodiment, the power generation amount of the generator 6 is forcibly increased and the battery 5 is fully charged after a predetermined time has elapsed from the previous full charge. The configuration is not limited to the configuration of the present embodiment as long as the integrated value of the detected current and the length of the period from the charging to the current full charging can be obtained.
【図１】バッテリに付設された本発明のバッテリ容量計
測装置の構成図である。FIG. 1 is a configuration diagram of a battery capacity measuring device of the present invention attached to a battery.
【図２】上記バッテリ容量計測装置のマイクロコンピュ
ータにおける制御を示すフローチャートである。FIG. 2 is a flowchart showing control in a microcomputer of the battery capacity measuring device.
【図３】上記バッテリ容量計測装置の作動を説明するグ
ラフである。FIG. 3 is a graph illustrating the operation of the battery capacity measurement device.
１ バッテリ容量計測装置 ２ 電流センサ ３ マイクロコンピュータ ３１ 検出電流積算手段 ３２ 除算手段 ３３ 補正手段 ３４ 満充電手段 ４ 満充電判定回路（満充電検出手段） ５ バッテリ ６ 発電機 ７ 負荷 DESCRIPTION OF SYMBOLS 1 Battery capacity measuring device 2 Current sensor 3 Microcomputer 31 Detected current integrating means 32 Dividing means 33 Correcting means 34 Full charge means 4 Full charge determination circuit (full charge detection means) 5 Battery 6 Generator 7 Load
───────────────────────────────────────────────────── フロントページの続き (72)発明者 菊地 哲郎 愛知県西尾市下羽角町岩谷14番地 株式会 社日本自動車部品総合研究所内 (72)発明者 岸田 晋二 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 (72)発明者 伊藤 慎一 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 Ｆターム(参考） 2G016 CA03 CB12 CB13 CB21 CB22 CB31 CB32 CC01 CC03 CC04 CC27 CC28 5G003 AA07 BA01 CA05 DA04 EA05 FA06 5G060 AA04 CA02 DB07 5H030 AA08 AS08 FF42 FF52 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Tetsuro Kikuchi 14 Iwatani, Shimowakaku-cho, Nishio-shi, Aichi Prefecture Inside the Japan Automobile Parts Research Institute, Inc. (72) Inventor Shinichi Ito 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference) 2G016 CA03 CB12 CB13 CB21 CB22 CB31 CB32 CC01 CC03 CC04 CC27 CC28 5G003 AA07 BA01 CA05 DA04 EA05 FA06 5G060 AA04 CA02 DB07 5H030 AA08 AS08 FF42 FF52
Claims (2)
され、電流センサにより得られたバッテリの充放電電流
の積算値に基づいてバッテリの現在の容量を求めるバッ
テリ容量計測装置において、バッテリが満充電にあるこ
とを検出する満充電検出手段と、満充電時からその後の
満充電時までの期間に電流センサの検出電流を積算する
検出電流積算手段と、検出電流積算手段により得られた
検出電流積算値を上記期間の長さで除する除算手段と、
除算手段により得られた除数値により検出電流をオフセ
ット補正する補正手段とを具備することを特徴とするバ
ッテリ容量計測装置。1. A battery capacity measuring device which is attached to a battery which can be charged by a generator and obtains a current capacity of the battery based on an integrated value of the charge / discharge current of the battery obtained by a current sensor. Full charge detection means for detecting that the current is present in the battery, detection current integration means for integrating the detection current of the current sensor during the period from the time of full charge to subsequent full charge, and detection current integration obtained by the detection current integration means Means for dividing the value by the length of the period;
A correction unit for offset-correcting the detected current by the divisor value obtained by the division unit.
おいて、前回の満充電時から所定時間経過すると上記発
電機を制御して上記バッテリを満充電にする満充電手段
を具備せしめたバッテリ容量計測装置。2. The battery capacity measurement device according to claim 1, further comprising a full charge means for controlling said generator to fully charge said battery when a predetermined time has elapsed since the last full charge. apparatus.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25563299A JP3432463B2 (en) | 1999-09-09 | 1999-09-09 | Battery capacity measurement device |
| EP00957070A EP1220413B1 (en) | 1999-09-09 | 2000-09-08 | Apparatus for battery capacity measurement and for remaining capacity calculation |
| CNB008154473A CN1230962C (en) | 1999-09-09 | 2000-09-08 | Apparatus for battery capacity measurement and for remaining capacity calculation |
| KR1020027003097A KR100554241B1 (en) | 1999-09-09 | 2000-09-08 | Apparatus for battery capacity measurement and for remaining capacity calculation |
| PCT/JP2000/006170 WO2001018938A1 (en) | 1999-09-09 | 2000-09-08 | Apparatus for battery capacity measurement and for remaining capacity calculation |
| EP08002364A EP1923710B1 (en) | 1999-09-09 | 2000-09-08 | Battery capacity measuring and remaining capacity calculating system |
| US10/070,375 US6621250B1 (en) | 1999-09-09 | 2000-09-08 | Battery capacity measuring and remaining capacity calculating system |
| DE60045170T DE60045170D1 (en) | 1999-09-09 | 2000-09-08 | System for measuring the battery capacity and calculating the remaining capacity |
| DE60041706T DE60041706D1 (en) | 1999-09-09 | 2000-09-08 | DEVICE FOR MEASURING THE BATTERY LOAD AND FOR CALCULATING THE REMAINING CHARGE |
| EP08002365A EP1923711B8 (en) | 1999-09-09 | 2000-09-08 | Battery capacity measuring and remaining capacity calculating system |
| DE60045169T DE60045169D1 (en) | 1999-09-09 | 2000-09-08 | System for measuring the battery capacity and calculating the remaining capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25563299A JP3432463B2 (en) | 1999-09-09 | 1999-09-09 | Battery capacity measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001078365A true JP2001078365A (en) | 2001-03-23 |
| JP3432463B2 JP3432463B2 (en) | 2003-08-04 |
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ID=17281455
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25563299A Expired - Fee Related JP3432463B2 (en) | 1999-09-09 | 1999-09-09 | Battery capacity measurement device |
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| JP (1) | JP3432463B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002345162A (en) * | 2001-05-11 | 2002-11-29 | Toyota Motor Corp | Method for determining full charging of a battery and device for determining the full charging |
| JP2003270276A (en) * | 2002-03-06 | 2003-09-25 | Hyundai Motor Co Ltd | Current measuring system for electric vehicle battery system |
| JP2003346918A (en) * | 2002-05-28 | 2003-12-05 | Braun Gmbh | Managing method for rechargeable battery |
| JP2004177187A (en) * | 2002-11-25 | 2004-06-24 | Yazaki Corp | Method for determining offset adjustment value for current sensor of battery current detection apparatus and battery current detection apparatus |
| JP2005160129A (en) * | 2003-11-20 | 2005-06-16 | Kokusan Denki Co Ltd | Battery charge controller |
| US7268532B2 (en) | 2002-12-13 | 2007-09-11 | Toyota Jidosha Kabushiki Kaisha | Apparatus and method for calculating offset value for an electric sensor |
| JP2008275609A (en) * | 2004-04-06 | 2008-11-13 | Cobasys Llc | Battery state of charge estimator |
| JP2009519701A (en) * | 2005-12-13 | 2009-05-14 | コバシス， エルエルシー | Reset battery charge |
| AT512745A1 (en) * | 2012-03-28 | 2013-10-15 | Avl List Gmbh | Method for determining the capacitance C of an energy storage device |
| US8878539B2 (en) | 2004-04-06 | 2014-11-04 | Robert Bosch Gmbh | State of charge tracking system for battery systems based on relaxation voltage |
| WO2015015133A1 (en) * | 2013-08-02 | 2015-02-05 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Energy management in a battery |
| JP2019060807A (en) * | 2017-09-28 | 2019-04-18 | 株式会社日立製作所 | State diagnostic device and state diagnostic method for secondary battery |
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1999
- 1999-09-09 JP JP25563299A patent/JP3432463B2/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002345162A (en) * | 2001-05-11 | 2002-11-29 | Toyota Motor Corp | Method for determining full charging of a battery and device for determining the full charging |
| JP2003270276A (en) * | 2002-03-06 | 2003-09-25 | Hyundai Motor Co Ltd | Current measuring system for electric vehicle battery system |
| JP2003346918A (en) * | 2002-05-28 | 2003-12-05 | Braun Gmbh | Managing method for rechargeable battery |
| JP2004177187A (en) * | 2002-11-25 | 2004-06-24 | Yazaki Corp | Method for determining offset adjustment value for current sensor of battery current detection apparatus and battery current detection apparatus |
| US7268532B2 (en) | 2002-12-13 | 2007-09-11 | Toyota Jidosha Kabushiki Kaisha | Apparatus and method for calculating offset value for an electric sensor |
| JP2005160129A (en) * | 2003-11-20 | 2005-06-16 | Kokusan Denki Co Ltd | Battery charge controller |
| JP2008275609A (en) * | 2004-04-06 | 2008-11-13 | Cobasys Llc | Battery state of charge estimator |
| US8878539B2 (en) | 2004-04-06 | 2014-11-04 | Robert Bosch Gmbh | State of charge tracking system for battery systems based on relaxation voltage |
| JP2009519701A (en) * | 2005-12-13 | 2009-05-14 | コバシス， エルエルシー | Reset battery charge |
| AT512745A1 (en) * | 2012-03-28 | 2013-10-15 | Avl List Gmbh | Method for determining the capacitance C of an energy storage device |
| AT512745B1 (en) * | 2012-03-28 | 2013-12-15 | Avl List Gmbh | Method for determining the capacitance C of an energy storage device |
| WO2015015133A1 (en) * | 2013-08-02 | 2015-02-05 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Energy management in a battery |
| FR3009389A1 (en) * | 2013-08-02 | 2015-02-06 | Commissariat Energie Atomique | ENERGY MANAGEMENT IN A BATTERY |
| JP2019060807A (en) * | 2017-09-28 | 2019-04-18 | 株式会社日立製作所 | State diagnostic device and state diagnostic method for secondary battery |
| WO2022249943A1 (en) * | 2021-05-28 | 2022-12-01 | 株式会社Ｇｓユアサ | Estimation device, power storage device, and estimation method |
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