JP2006010501A - Battery status administration system - Google Patents

Battery status administration system Download PDF

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JP2006010501A
JP2006010501A JP2004187920A JP2004187920A JP2006010501A JP 2006010501 A JP2006010501 A JP 2006010501A JP 2004187920 A JP2004187920 A JP 2004187920A JP 2004187920 A JP2004187920 A JP 2004187920A JP 2006010501 A JP2006010501 A JP 2006010501A
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battery
state management
management device
terminal voltage
detected
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Keiichi Kono
圭一 河野
Shuji Mayama
修二 眞山
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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    • 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

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery state administration system capable of exactly judging degradation of the battery. <P>SOLUTION: The battery status administration system turns on a load 17 and forcedly discharge when practically full charge of the battery 11 is detected, detects the terminal voltage lowering and discharge current value at the moment are detected by way of a voltage sensor 3 and a current sensor 1, and judges a degradation of the battery 11 based on the internal resistance value of the battery 11 derived from the detection values. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、バッテリの状態を管理するバッテリ状態管理装置に関する。   The present invention relates to a battery state management device that manages the state of a battery.

従来のバッテリ状態管理装置におけるバッテリの劣化判定は、エンジン始動時のバッテリの端子電圧の降下量とそのときに流れる電流値とからバッテリの内部抵抗値を測定し、その測定した内部抵抗値に基づいてバッテリの劣化度が判定されるようになっている。   The battery deterioration determination in the conventional battery state management device is based on the measured internal resistance value by measuring the internal resistance value of the battery from the amount of decrease in the battery terminal voltage when starting the engine and the current value flowing at that time. Thus, the degree of deterioration of the battery is determined.

しかしながら、上記の従来技術では、内部抵抗値はバッテリの充電残量によって変化するため、エンジン始動時におけるバッテリの充電残量の状態によって正確な劣化判定ができない場合がある。   However, in the above-described prior art, the internal resistance value changes depending on the remaining charge of the battery, and therefore, accurate deterioration determination may not be possible depending on the state of the remaining charge of the battery when the engine is started.

そこで、本発明の解決すべき課題は、バッテリの劣化判定を正確に行うことができるバッテリ状態管理装置を提供することである。   Therefore, the problem to be solved by the present invention is to provide a battery state management device that can accurately determine the deterioration of the battery.

上記の課題を解決するため、請求項１の発明では、バッテリの状態を管理するバッテリ状態管理装置であって、前記バッテリの端子電圧を検出する電圧検出手段と、前記バッテリの入出力電流を検出する電流検出手段と、前記バッテリに対する充電により前記バッテリの充電残量が所定の基準充電レベルとなったことを検出した際に、前記バッテリの前記端子電圧を下又は上に変化させ、その変化させた際の前記端子電圧の変化量及び前記バッテリの入出力電流値を前記電圧検出手段及び前記電流検出手段を介して検出し、その検出した前記端子電圧の前記変化量及び前記入出力電流値に基づいて前記バッテリの劣化度を判定する判定手段とを備える。   In order to solve the above-mentioned problems, in the first aspect of the present invention, there is provided a battery state management device for managing the state of the battery, the voltage detecting means for detecting the terminal voltage of the battery, and the input / output current of the battery being detected. And detecting the current detection means for charging the battery to change the terminal voltage of the battery downward or upward when the remaining charge level of the battery reaches a predetermined reference charge level. The amount of change in the terminal voltage and the input / output current value of the battery are detected via the voltage detection means and the current detection means, and the detected amount of change in the terminal voltage and the input / output current value are detected. Determination means for determining the degree of deterioration of the battery based on the determination means.

また、請求項２の発明では、請求項１の発明に係るバッテリ状態管理装置において、前記判定手段は、検出した前記端子電圧の前記変化量及び前記入出力電流値に基づいて前記バッテリの内部抵抗値を導出し、その導出した内部抵抗値に基づいて劣化度を判定する。   According to a second aspect of the present invention, in the battery state management device according to the first aspect of the present invention, the determination unit is configured to determine the internal resistance of the battery based on the detected amount of change in the terminal voltage and the input / output current value. A value is derived, and the degree of deterioration is determined based on the derived internal resistance value.

また、請求項３の発明では、請求項１又は２の発明に係るバッテリ状態管理装置において、前記所定の基準充電レベルは、実質的に満充電である。   According to a third aspect of the invention, in the battery state management device according to the first or second aspect of the invention, the predetermined reference charge level is substantially full.

また、請求項４の発明では、請求項１ないし３のいずれかの発明に係るバッテリ状態管理装置において、前記判定手段は、前記バッテリの充電残量が前記所定の基準充電レベルとなったことを検出した際に、所定の負荷をオンさせて前記バッテリの前記端子電圧を降下させることにより前記端子電圧の変化を生じさせる。   According to a fourth aspect of the present invention, in the battery state management device according to any one of the first to third aspects of the present invention, the determination means confirms that the remaining charge of the battery has reached the predetermined reference charge level. When detected, a change in the terminal voltage is caused by turning on a predetermined load to lower the terminal voltage of the battery.

また、請求項５の発明では、請求項１ないし３のいずれかの発明に係るバッテリ状態管理装置において、前記判定手段は、前記バッテリの充電残量が前記所定の基準充電レベルとなったことを検出した際に、オルタネータの出力電圧を降下させて前記バッテリの前記端子電圧を降下させることにより前記端子電圧の変化を生じさせる。   According to a fifth aspect of the present invention, in the battery state management device according to any one of the first to third aspects of the present invention, the determination means determines that the remaining charge of the battery has reached the predetermined reference charge level. When detected, the output voltage of the alternator is lowered to lower the terminal voltage of the battery, thereby causing a change in the terminal voltage.

また、請求項６の発明では、請求項１ないし３のいずれかの発明に係るバッテリ状態管理装置において、前記判定手段は、前記バッテリの充電残量が前記所定の基準レベルとなったことを検出した際に、オルタネータの出力電圧を上昇させて前記バッテリの前記端子電圧を上昇させることにより前記端子電圧の変化を生じさせる。   According to a sixth aspect of the present invention, in the battery state management device according to any one of the first to third aspects, the determination unit detects that the remaining charge of the battery has reached the predetermined reference level. When this occurs, the output voltage of the alternator is raised to raise the terminal voltage of the battery, thereby causing a change in the terminal voltage.

また、請求項７の発明では、請求項３の発明に係るバッテリ状態管理装置において、前記判定手段は、前記バッテリに入力される電流が所定の基準電流レベル以下になったことを前記電流検出手段を介して検出することにより前記バッテリが実質的に満充電となったことを検出する。   According to a seventh aspect of the present invention, in the battery state management device according to the third aspect of the present invention, the determination means determines that the current input to the battery has become equal to or lower than a predetermined reference current level. To detect that the battery is substantially fully charged.

また、請求項８の発明では、請求項２の発明に係るバッテリ状態管理装置において、前記バッテリの温度を検出する温度検出手段をさらに備え、前記判定手段は、導出した前記内部抵抗値を、前記温度検出手段を介して検出した前記バッテリの温度に基づいて補正し、その補正値に基づいて劣化度の判定を行う。   According to an eighth aspect of the present invention, in the battery state management device according to the second aspect of the present invention, the battery state management device further comprises a temperature detecting means for detecting the temperature of the battery, and the determining means uses the derived internal resistance value as the Correction is performed based on the temperature of the battery detected via the temperature detection means, and the deterioration degree is determined based on the correction value.

請求項１に記載の発明によれば、バッテリの充電残量が所定の基準充電レベルになったことを検出した際に、バッテリの端子電圧を下又は上に変化させてその際のバッテリの端子電圧の変化量及び入出力電流値に基づいて劣化度を判定するため、所定の基準充電レベルの状態を基準としてバッテリの劣化判定を行うことができ、これによって正確な劣化判定を行うことができる。   According to the first aspect of the present invention, when it is detected that the remaining charge amount of the battery has reached the predetermined reference charge level, the terminal voltage of the battery is changed by changing the battery terminal voltage downward or upward. Since the deterioration degree is determined based on the voltage change amount and the input / output current value, the battery deterioration determination can be performed based on the state of a predetermined reference charging level, and thereby an accurate deterioration determination can be performed. .

請求項２に記載の発明によれば、内部抵抗値を用いることにより容易にバッテリの劣化度を判定できる。   According to the second aspect of the present invention, the degree of deterioration of the battery can be easily determined by using the internal resistance value.

請求項３に記載の発明によれば、バッテリが実質的に満充電になったことは容易に検出できるとともに、通常ではエンジンが始動されてバッテリの充電が開始され、後所定期間が経過すると、バッテリが満充電となるケースが多いため、バッテリの劣化判定を容易かつ正確に行うことができる。   According to the third aspect of the present invention, it can be easily detected that the battery is substantially fully charged, and normally, the engine is started and charging of the battery is started. Since there are many cases where the battery is fully charged, it is possible to easily and accurately determine the deterioration of the battery.

請求項４に記載の発明によれば、所定の負荷をオンさせてバッテリの端子電圧を降下させるため、バッテリの端子電圧を降下させるための特別な抵抗体等の装置を設ける必要がなく、装置構成の簡略化が図れる。   According to the fourth aspect of the present invention, since a predetermined load is turned on to lower the terminal voltage of the battery, it is not necessary to provide a device such as a special resistor for lowering the terminal voltage of the battery. The configuration can be simplified.

請求項５に記載の発明によれば、オルタネータの出力電圧を降下させてバッテリの端子電圧を降下させるため、バッテリの端子電圧を降下させるための特別な抵抗体等の装置を設ける必要がないとともに、負荷等の特別なオンオフ制御等を行う必要もなく、装置構成の簡略化が図れる。   According to the invention described in claim 5, since the output voltage of the alternator is lowered to lower the terminal voltage of the battery, it is not necessary to provide a device such as a special resistor for lowering the terminal voltage of the battery. In addition, it is not necessary to perform special on / off control of the load or the like, and the apparatus configuration can be simplified.

請求項６に記載の発明によれば、オルタネータの出力電圧を上昇させてバッテリの端子電圧を上昇させるため、容易に端子電圧の変化を生じさせることができる。   According to the sixth aspect of the present invention, since the output voltage of the alternator is increased to increase the terminal voltage of the battery, the terminal voltage can be easily changed.

請求項７に記載の発明によれば、バッテリに入力される電流が所定の基準電流レベル以下になったことを検出することにより、バッテリが実質的に満充電となったことを検出するため、バッテリが実質的に満充電となったことを容易かつ確実に検出することができる。   According to the invention described in claim 7, in order to detect that the battery is substantially fully charged by detecting that the current input to the battery has become equal to or lower than the predetermined reference current level, It can be easily and reliably detected that the battery is substantially fully charged.

請求項８に記載の発明によれば、導出した内部抵抗値を、検出したバッテリの温度に基づいて補正し、その補正値に基づいて前記劣化度の判定を行うため、種々の温度環境下においてバッテリの劣化判定を正確に行うことができる。   According to the eighth aspect of the present invention, the derived internal resistance value is corrected based on the detected battery temperature, and the deterioration degree is determined based on the detected battery temperature. The battery deterioration can be accurately determined.

＜第１実施形態＞
図１は、本発明の第１実施形態に係るバッテリ状態管理装置のブロック図である。このバッテリ状態管理装置は、図１に示すように、電流センサ（電流検出手段）１、電圧センサ（電圧検出手段）３、処理部（判定手段）５、記憶部７及び出力部９を備えて構成されており、車両に搭載されたバッテリ１１の状態を管理する。 <First Embodiment>
FIG. 1 is a block diagram of a battery state management apparatus according to the first embodiment of the present invention. As shown in FIG. 1, the battery state management device includes a current sensor (current detection unit) 1, a voltage sensor (voltage detection unit) 3, a processing unit (determination unit) 5, a storage unit 7, and an output unit 9. It is comprised and manages the state of the battery 11 mounted in the vehicle.

電流センサ１は、バッテリ１１の入出力電流を検出する。電圧センサ３は、バッテリ１１の端子電圧を検出する。処理部５は、ＣＰＵ等を備えて構成され、バッテリ１１の管理のために各種の情報処理動作（制御動作も含む）を行う（詳細は後述）。記憶部７は、メモリ等により構成され、処理部５が行う各種の情報処理動作に必要な情報等が記憶されている。出力部９は、バッテリ１１の状態の判定結果等を出力するためのものである。   The current sensor 1 detects the input / output current of the battery 11. The voltage sensor 3 detects the terminal voltage of the battery 11. The processing unit 5 includes a CPU and the like, and performs various information processing operations (including control operations) for managing the battery 11 (details will be described later). The storage unit 7 includes a memory and the like, and stores information necessary for various information processing operations performed by the processing unit 5. The output unit 9 is for outputting a determination result of the state of the battery 11 and the like.

処理部５によるバッテリ管理には、バッテリ１１の充電管理と劣化判定とが含まれる。充電管理では、バッテリ１１の充電残量の状態に応じてオルタネータ１３の発電状況（出力電圧等）を制御することにより、バッテリ１１の充電残量の管理が行われる。一般的に、エンジン１５が始動されるとオルタネータ１３によるバッテリ１１の充電が開始され、バッテリ１１の充電残量が実質的に満充電（例えば、完全な満充電）にされ、その後、各種負荷１７による電力消費によってバッテリ１１の充電残量が低下した際等にオルタネータ１３によるバッテリ１１に対する充電が行われるようになっている。   Battery management by the processing unit 5 includes charge management of the battery 11 and deterioration determination. In the charge management, the remaining charge of the battery 11 is managed by controlling the power generation status (output voltage, etc.) of the alternator 13 according to the state of the remaining charge of the battery 11. In general, when the engine 15 is started, charging of the battery 11 by the alternator 13 is started, the remaining charge of the battery 11 is substantially fully charged (for example, fully charged), and then various loads 17 are set. The battery 11 is charged by the alternator 13 when the remaining charge of the battery 11 is reduced due to the power consumption due to the above.

また、処理部５による劣化判定では、エンジン始動後の充電によりバッテリ１１が実質的に満充電となった際に、バッテリ１１の端子電圧を下又は上に変化させ、その変化させた際の端子電圧の変化量及びバッテリの入出力電流値を電圧センサ３及び電流センサ１を介して検出し、その検出した端子電圧の変化量及び入出力電流値に基づいてバッテリ１１内部抵抗値を導出し、その導出した内部抵抗値に基づいてバッテリ１１の劣化度が判定される。   Further, in the deterioration determination by the processing unit 5, when the battery 11 is substantially fully charged by charging after the engine is started, the terminal voltage of the battery 11 is changed downward or upward, and the terminal at the time of the change is changed. The voltage change amount and the input / output current value of the battery are detected via the voltage sensor 3 and the current sensor 1, and the internal resistance value of the battery 11 is derived based on the detected change amount of the terminal voltage and the input / output current value. Based on the derived internal resistance value, the degree of deterioration of the battery 11 is determined.

この処理部５による劣化判定処理について具体的に説明する。図２はバッテリ１１の端子電圧、充電電流及び放電電流の時間的推移を模式的に示す波形図である。図２の時刻Ｔ１でエンジン１５が始動され、オルタネータ１３によるバッテリ１１の充電が開始されると、充電が進むにつれて、波形Ｇ１で示すようにバッテリ１１の端子電圧が上昇する。そして、バッテリ１１の充電状態が満充電に近づくと、波形Ｇ２で示すようにバッテリ１１に入力される充電電流が徐々に低下する。   The deterioration determination process by the processing unit 5 will be specifically described. FIG. 2 is a waveform diagram schematically showing temporal transitions of the terminal voltage, charging current, and discharging current of the battery 11. When the engine 15 is started at time T1 in FIG. 2 and charging of the battery 11 by the alternator 13 is started, as the charging proceeds, the terminal voltage of the battery 11 rises as shown by the waveform G1. When the state of charge of the battery 11 approaches full charge, the charging current input to the battery 11 gradually decreases as shown by the waveform G2.

そして、時刻Ｔ２で、バッテリ１１が実質的に満充電（例えば、完全な満充電）になったことを検出すると、オルタネータ１３による充電を停止し（これによって充電電流はゼロになる）、波形Ｇ３で示すにように所定の負荷１７（詳細は後述）をオンさせてバッテリ１１に強制的に放電させることによりバッテリ１１の端子電圧を降下させる。この強制放電の開始前後におけるバッテリ１１の端子電圧の降下量ｄＶと、バッテリ１１の放電電流値Ｉｏｕｔとが電圧センサ３及び電流センサ１を介して検出され、その電圧降下量ｄＶを放電電流値Ｉｏｕｔで割算することにより、バッテリ１１の内部抵抗値が導出され、その内部抵抗値の値に基づいてバッテリ１１の劣化度が判定される。例えば、導出した内部抵抗値が所定基準を上回っているか否かによりバッテリ１１の劣化の有無が判定される。その判定結果は、出力部９を介して出力される。   At time T2, when it is detected that the battery 11 is substantially fully charged (for example, fully charged), charging by the alternator 13 is stopped (thereby causing the charging current to become zero), and the waveform G3 As shown, the predetermined load 17 (details will be described later) is turned on and the battery 11 is forcibly discharged to lower the terminal voltage of the battery 11. The terminal voltage drop amount dV of the battery 11 and the discharge current value Iout of the battery 11 before and after the start of the forced discharge are detected via the voltage sensor 3 and the current sensor 1, and the voltage drop amount dV is detected as the discharge current value Iout. The internal resistance value of the battery 11 is derived by dividing by, and the degree of deterioration of the battery 11 is determined based on the value of the internal resistance value. For example, the presence or absence of deterioration of the battery 11 is determined based on whether or not the derived internal resistance value exceeds a predetermined reference. The determination result is output via the output unit 9.

ここで、エンジン始動後、バッテリ１１が実質的に満充電（例えば、完全な満充電）になったことの検出は、例えば、オルタネータ１３による充電が行われている際にバッテリ１１に入力される充電電流の値が所定の基準電流レベル以下になったことを電流センサ１を介して検出することにより行われる。   Here, after the engine is started, detection that the battery 11 is substantially fully charged (for example, complete full charge) is input to the battery 11 when charging by the alternator 13 is performed, for example. This is performed by detecting through the current sensor 1 that the value of the charging current has become equal to or lower than a predetermined reference current level.

また、劣化判定のためのにバッテリ１１に強制放電を行わせるため負荷１７としては、オンされた際の電力消費量が所定レベル以上で、かつオンされたことが車両搭乗者に意識されない電装品であるのが望ましい。具体的には、デフォッガやシートヒータ等が考えられる。   In addition, as a load 17 for causing the battery 11 to perform a forced discharge for the deterioration determination, the electric power consumption when turned on is equal to or higher than a predetermined level, and the vehicle passenger is not conscious of being turned on. It is desirable that Specifically, a defogger, a seat heater, etc. can be considered.

以上のように、本実施形態によれば、バッテリ１１の充電残量が実質的に満充電（例えば、完全な満充電）になったことを検出した際に、バッテリ１１に強制的に放電を行わせ、その際の端子電圧の下降量ｄＶ及び放電電流値Ｉｏｕｔを検出し、それらの検出値に基づいて導出したバッテリ１１の内部抵抗値に基づいてバッテリ１１の劣化度を判定するため、実質的に満充電の状態を基準としてバッテリ１１の劣化判定を行うことができ、これによって正確な劣化判定を行うことができる。   As described above, according to the present embodiment, when it is detected that the remaining charge of the battery 11 is substantially fully charged (for example, full charge), the battery 11 is forcibly discharged. In order to determine the degree of deterioration of the battery 11 based on the internal resistance value of the battery 11 derived based on the detected values, the terminal voltage drop amount dV and the discharge current value Iout are detected. Therefore, it is possible to determine the deterioration of the battery 11 on the basis of the fully charged state, and thus it is possible to accurately determine the deterioration.

また、バッテリ１１が実質的に満充電になったことは容易に検出できるとともに、通常ではエンジン１５が始動されてバッテリ１１の充電が開始され、後所定期間が経過すると、バッテリ１１が満充電となるケースが多いため、バッテリ１１の劣化判定を容易かつ正確に行うことができる。   In addition, it can be easily detected that the battery 11 is substantially fully charged. Normally, the engine 15 is started and charging of the battery 11 is started. After a predetermined period of time elapses, the battery 11 is fully charged. Therefore, the deterioration determination of the battery 11 can be easily and accurately performed.

また、所定の負荷１７（例えば、デフォッガ等）をオンさせてバッテリ１１に強制的に放電を行わせてその端子電圧を降下させるため、バッテリ１１の端子電圧を降下させるための特別な抵抗体等の装置を設ける必要がなく、装置構成の簡略化が図れる。   Also, a special resistor or the like for lowering the terminal voltage of the battery 11 is used to turn on a predetermined load 17 (for example, a defogger or the like) to forcibly discharge the battery 11 to lower its terminal voltage. It is not necessary to provide this device, and the device configuration can be simplified.

また、バッテリ１１の充電電流が所定の基準電流レベル以下になったことを検出することにより、バッテリ１１が実質的に満充電となったことを検出するため、バッテリ１１が実質的に満充電となったことを容易かつ確実に検出することができる。   Further, by detecting that the charging current of the battery 11 has become equal to or lower than a predetermined reference current level, it is detected that the battery 11 is substantially fully charged. This can be detected easily and reliably.

なお、本実施形態では、バッテリ１１が実質的に満充電となったときに所定の負荷１７をオンさせることよりバッテリ１１の端子電圧を降下させるようにしたが、この変形例として、オルタネータ１３の出力電圧を降下させる（あるいは、オルタネータ１３の電力出力をオフする）ことにより、バッテリ１１の端子電圧を降下させ、その際の電圧降下量とバッテリ１１からの放電電流値とに基づいてバッテリ１１の内部抵抗値を導出して劣化判定を行うようにしてもよい。この場合にも、バッテリ１１の端子電圧を降下させるための特別な抵抗体等の装置を設ける必要がないとともに、負荷１７等の特別なオンオフ制御等を行う必要もなく、装置構成の簡略化が図れる。   In the present embodiment, the terminal voltage of the battery 11 is lowered by turning on the predetermined load 17 when the battery 11 is substantially fully charged. By dropping the output voltage (or turning off the power output of the alternator 13), the terminal voltage of the battery 11 is lowered, and based on the voltage drop amount at that time and the discharge current value from the battery 11, The internal resistance value may be derived to determine the deterioration. Also in this case, it is not necessary to provide a device such as a special resistor for dropping the terminal voltage of the battery 11, and it is not necessary to perform a special on / off control of the load 17 or the like, thereby simplifying the device configuration. I can plan.

他の変形例として、バッテリ１１が実質的に満充電となったときに、オルタネータ１３の出力電圧を上昇させてバッテリ１１の端子電圧を上昇させることにより端子電圧の変化を生じさせ、その際の端子電圧の上昇量とバッテリ１１に入力される充電電流量とに基づいてバッテリ１１の内部抵抗値を導出して劣化判定を行うようにしてもよい。この場合、オルタネータ１３の出力電圧を上昇させてバッテリ１１の端子電圧を上昇させるため、容易に端子電圧の変化を生じさせることができる。   As another modification, when the battery 11 is substantially fully charged, the output voltage of the alternator 13 is increased to increase the terminal voltage of the battery 11 to cause a change in the terminal voltage. The deterioration determination may be performed by deriving the internal resistance value of the battery 11 based on the increase amount of the terminal voltage and the charging current amount input to the battery 11. In this case, since the output voltage of the alternator 13 is increased to increase the terminal voltage of the battery 11, a change in the terminal voltage can be easily generated.

また、本実施形態ではバッテリ１１の充電残量が実質的に満充電であるときにその内部抵抗値を検出し、その検出値に基づいて劣化判定を行うようにしたが、この変形例として、バッテリ１１の充電残量が満充電以外の充電レベルであるときのその内部抵抗値を検出し、その検出値に基づいて劣化判定を行うようにしてもよい。   Further, in this embodiment, when the remaining charge of the battery 11 is substantially full, the internal resistance value is detected, and the deterioration determination is performed based on the detected value. The internal resistance value when the remaining charge amount of the battery 11 is a charge level other than full charge may be detected, and deterioration determination may be performed based on the detected value.

＜第２実施形態＞
図３は、本発明の第２実施形態に係るバッテリ状態管理装置のブロック図である。本実施形態に係るバッテリ状態管理装置が第１実施形態に係るバッテリ状態管理装置と実質的に異なる点は、バッテリ１１の温度を検出する温度センサ（温度検出手段）２１を設け、バッテリ１１の温度を加味してバッテリ１１の劣化判定を行うようにした点のみであり、対応する部分には同一の参照符号を付して説明を省略する。 Second Embodiment
FIG. 3 is a block diagram of a battery state management apparatus according to the second embodiment of the present invention. The battery state management device according to this embodiment is substantially different from the battery state management device according to the first embodiment in that a temperature sensor (temperature detection means) 21 that detects the temperature of the battery 11 is provided, and the temperature of the battery 11 is This is only the point where the deterioration of the battery 11 is determined in consideration of the above, and the corresponding parts are denoted by the same reference numerals and the description thereof is omitted.

図４は、満充電状態におけるバッテリ１１の温度と内部抵抗値との関係を調べた試験結果を示すグラフである。この試験結果が示すようにバッテリ１１の内部抵抗値は温度の変化に伴って変化するようになっている。   FIG. 4 is a graph showing test results obtained by examining the relationship between the temperature of the battery 11 and the internal resistance value in a fully charged state. As shown by the test results, the internal resistance value of the battery 11 changes with changes in temperature.

そこで、本実施形態では、処理部５が、第１実施形態又はその変形例と同様にして、バッテリ１１の端子電圧を変化させた際のその変化量と入出力電流値とに基づいてバッテリ１１の内部抵抗値を導出し、その導出した内部抵抗値を温度センサ２１を介して検出したバッテリ１１の温度に基づいて補正し、その補正値に基づいて劣化判定を行うようになっている。   Therefore, in the present embodiment, the processing unit 5 performs the battery 11 based on the change amount and the input / output current value when the terminal voltage of the battery 11 is changed, as in the first embodiment or the modification thereof. The internal resistance value is derived, the derived internal resistance value is corrected based on the temperature of the battery 11 detected via the temperature sensor 21, and the deterioration is determined based on the corrected value.

より具体的には、例えば、バッテリ１１の内部抵抗値の温度変化特性に関する温度特性情報を試験等により取得して記憶部７に記憶させておき、処理部５に、端子電圧の変化量と入出力電流値とに基づいて導出された内部抵抗値を、その温度特性情報に基づいて所定の基準温度における内部抵抗値（換算内部抵抗値）に換算させ、その換算値を用いて劣化判定を行わせることが考えられる。   More specifically, for example, temperature characteristic information related to the temperature change characteristic of the internal resistance value of the battery 11 is acquired by a test or the like and stored in the storage unit 7. The internal resistance value derived based on the output current value is converted into an internal resistance value (converted internal resistance value) at a predetermined reference temperature based on the temperature characteristic information, and deterioration is determined using the converted value. It can be considered.

以上のように、本実施形態よれば、上述の第１実施形態とほぼ同様な効果が得られるとともに、導出したバッテリ１１の内部抵抗値を、検出したバッテリの温度に基づいて補正し、その補正値に基づいて劣化度の判定を行うため、種々の温度環境下においてバッテリ１１の劣化判定を正確に行うことができる。   As described above, according to the present embodiment, substantially the same effects as those of the first embodiment described above can be obtained, and the derived internal resistance value of the battery 11 is corrected based on the detected battery temperature, and the correction is performed. Since the deterioration degree is determined based on the value, the deterioration determination of the battery 11 can be accurately performed under various temperature environments.

本発明の第１実施形態に係るバッテリ状態管理装置のブロック図である。It is a block diagram of the battery state management apparatus which concerns on 1st Embodiment of this invention. バッテリの端子電圧、充電電流及び放電電流の時間的推移を模式的に示す波形図である。It is a wave form diagram which shows typically time transition of the terminal voltage of a battery, charge current, and discharge current. 本発明の第２実施形態に係るバッテリ状態管理装置のブロック図である。It is a block diagram of the battery state management apparatus which concerns on 2nd Embodiment of this invention. バッテリの温度と内部抵抗値との関係を調べた試験結果を示すグラフである。It is a graph which shows the test result which investigated the relationship between the temperature of a battery, and internal resistance value.

符号の説明Explanation of symbols

１ 電流センサ
３ 電圧センサ
５ 処理部
７ 記憶部
９ 出力部
１１ バッテリ
１３ オルタネータ
１５ エンジン
１７ 負荷
２１ 温度センサ DESCRIPTION OF SYMBOLS 1 Current sensor 3 Voltage sensor 5 Processing part 7 Memory | storage part 9 Output part 11 Battery 13 Alternator 15 Engine 17 Load 21 Temperature sensor

Claims (8)

バッテリの状態を管理するバッテリ状態管理装置であって、
前記バッテリの端子電圧を検出する電圧検出手段と、
前記バッテリの入出力電流を検出する電流検出手段と、
前記バッテリに対する充電により前記バッテリの充電残量が所定の基準充電レベルとなったことを検出した際に、前記バッテリの前記端子電圧を下又は上に変化させ、その変化させた際の前記端子電圧の変化量及び前記バッテリの入出力電流値を前記電圧検出手段及び前記電流検出手段を介して検出し、その検出した前記端子電圧の前記変化量及び前記入出力電流値に基づいて前記バッテリの劣化度を判定する判定手段と、
を備えることを特徴とするバッテリ状態管理装置。 A battery state management device for managing the state of a battery,
Voltage detecting means for detecting a terminal voltage of the battery;
Current detection means for detecting input / output current of the battery;
When it is detected that the remaining charge amount of the battery has reached a predetermined reference charge level by charging the battery, the terminal voltage of the battery is changed downward or upward, and the terminal voltage is changed. And the input / output current value of the battery are detected via the voltage detection means and the current detection means, and the battery is deteriorated based on the detected change amount and the input / output current value of the terminal voltage. Determining means for determining the degree;
A battery state management device comprising: 請求項１に記載のバッテリ状態管理装置において、
前記判定手段は、
検出した前記端子電圧の前記変化量及び前記入出力電流値に基づいて前記バッテリの内部抵抗値を導出し、その導出した内部抵抗値に基づいて劣化度を判定することを特徴とするバッテリ状態管理装置。 The battery state management device according to claim 1,
The determination means includes
A battery state management characterized in that an internal resistance value of the battery is derived based on the detected amount of change in the terminal voltage and the input / output current value, and a deterioration degree is determined based on the derived internal resistance value. apparatus. 請求項１又は２に記載のバッテリ状態管理装置において、
前記所定の基準充電レベルは、実質的に満充電であることを特徴とするバッテリ状態管理装置。 In the battery state management device according to claim 1 or 2,
The battery state management device, wherein the predetermined reference charge level is substantially full charge. 請求項１ないし３のいずれかに記載のバッテリ状態管理装置において、
前記判定手段は、
前記バッテリの充電残量が前記所定の基準充電レベルとなったことを検出した際に、所定の負荷をオンさせて前記バッテリの前記端子電圧を降下させることにより前記端子電圧の変化を生じさせることを特徴とするバッテリ状態管理装置。 In the battery state management device according to any one of claims 1 to 3,
The determination means includes
When detecting that the remaining charge of the battery has reached the predetermined reference charge level, the terminal voltage is changed by turning on a predetermined load to lower the terminal voltage of the battery. A battery state management device. 請求項１ないし３のいずれかに記載のバッテリ状態管理装置において、
前記判定手段は、
前記バッテリの充電残量が前記所定の基準充電レベルとなったことを検出した際に、オルタネータの出力電圧を降下させて前記バッテリの前記端子電圧を降下させることにより前記端子電圧の変化を生じさせることを特徴とするバッテリ状態管理装置。 In the battery state management device according to any one of claims 1 to 3,
The determination means includes
When it is detected that the remaining charge of the battery has reached the predetermined reference charge level, the output voltage of the alternator is lowered to lower the terminal voltage of the battery, thereby causing a change in the terminal voltage. A battery state management device. 請求項１ないし３のいずれかに記載のバッテリ状態管理装置において、
前記判定手段は、
前記バッテリの充電残量が前記所定の基準レベルとなったことを検出した際に、オルタネータの出力電圧を上昇させて前記バッテリの前記端子電圧を上昇させることにより前記端子電圧の変化を生じさせることを特徴とするバッテリ状態管理装置。 In the battery state management device according to any one of claims 1 to 3,
The determination means includes
When detecting that the remaining charge of the battery has reached the predetermined reference level, the output voltage of the alternator is increased to increase the terminal voltage of the battery, thereby causing the terminal voltage to change. A battery state management device. 請求項３に記載のバッテリ状態管理装置において、
前記判定手段は、
前記バッテリに入力される電流が所定の基準電流レベル以下になったことを前記電流検出手段を介して検出することにより前記バッテリが実質的に満充電となったことを検出することを特徴とするバッテリ状態管理装置。 The battery state management device according to claim 3,
The determination means includes
It is detected that the battery is substantially fully charged by detecting, via the current detection means, that the current input to the battery is equal to or lower than a predetermined reference current level. Battery state management device. 請求項２に記載のバッテリ状態管理装置において、
前記バッテリの温度を検出する温度検出手段をさらに備え、
前記判定手段は、
導出した前記内部抵抗値を、前記温度検出手段を介して検出した前記バッテリの温度に基づいて補正し、その補正値に基づいて劣化度の判定を行うことを特徴とするバッテリ状態管理装置。 The battery state management device according to claim 2,
Temperature detecting means for detecting the temperature of the battery,
The determination means includes
A battery state management device, wherein the derived internal resistance value is corrected based on the temperature of the battery detected via the temperature detection means, and the deterioration degree is determined based on the correction value.
JP2004187920A 2004-06-25 2004-06-25 Battery status administration system Pending JP2006010501A (en)

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