JPH0277668A - Method for judging service life of car battery - Google Patents
Method for judging service life of car batteryInfo
- Publication number
- JPH0277668A JPH0277668A JP63229469A JP22946988A JPH0277668A JP H0277668 A JPH0277668 A JP H0277668A JP 63229469 A JP63229469 A JP 63229469A JP 22946988 A JP22946988 A JP 22946988A JP H0277668 A JPH0277668 A JP H0277668A
- Authority
- JP
- Japan
- Prior art keywords
- storage battery
- engine
- battery
- deterioration
- service life
- 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
- 238000000034 method Methods 0.000 title claims abstract description 7
- 230000006866 deterioration Effects 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims description 13
- 230000007423 decrease Effects 0.000 description 9
- 230000005856 abnormality Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
Landscapes
- Tests Of Electric Status Of Batteries (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は自動車用蓄電池の寿命判定方法に関するもので
あり、寿命劣化の予測精度の向上を目的とするものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for determining the lifespan of a storage battery for an automobile, and its purpose is to improve the accuracy of predicting lifespan deterioration.
従来の技術およびその問題点
自動車用蓄電池は主にエンジンの始動を目的としている
ことから、エンジンの始動不能、走行中のエンストとい
ったトラブルを防止するため、従来より蓄電池の容量低
下、寿命劣化の事前検出を目的として種々の蓄電池状態
モニターが考案されてきた。Conventional technologies and their problems Since automotive storage batteries are mainly used to start the engine, in order to prevent troubles such as the inability to start the engine or stalling while driving, conventional technologies have been used to prevent storage batteries from decreasing in capacity or deteriorating in life. Various battery condition monitors have been devised for detection purposes.
ところが、通常、自動車用蓄電池は２ｖ単電池を６個直
列に一体に構成しており、さらに、その容量低下、寿命
劣化モードは多岐に渡り、容量低下、寿命劣化を定量的
に正確に判定することは難しく、充放電時の蓄電池電圧
の変化等を目安として、概略の蓄電池の容量状態を推定
していたに止まる。特に寿命劣化の事前検出は困難であ
り、充放電アンバランスによる単なる容量低下との区分
はほとんど不可能であった。However, storage batteries for automobiles are usually configured with six 2V single cells connected in series, and their capacity reduction and lifespan deterioration modes are wide-ranging. However, it is difficult to estimate the approximate capacity of a storage battery using changes in battery voltage during charging and discharging as a guide. In particular, it has been difficult to detect lifespan deterioration in advance, and it has been almost impossible to distinguish it from mere capacity reduction due to charge/discharge imbalance.
問題点を解決するための手段
本発明はこのような従来の問題点の解消を目的になされ
たもので、エンジン始動前と始動中の蓄電池の端子電圧
の相関性に着目して、エンジン始動前の蓄電池の端子電
圧とエンジン始動中の蓄電池の端子電圧を検出する機構
と、該検出機構による検出結果を記憶して、記憶内容か
らエンジン始動前の蓄電池の端子電圧とエンジン始動中
の蓄電池の端子電圧との関係を直線関係として近似計算
する機構と、任意の時点の検出結果が近似計算手段より
求めた直線関係より、予め定めた基準値以上ズレる場合
にはオルタネータの充電電圧を上昇させ、基準値以上ズ
レる場合が予め定めた回数以上連続して発生する場合に
警告−表示手段に蓄電池寿命劣化予告警報を表示させる
ことを特徴とするものであり、さらにはエンジンブロッ
ク温度および外気温度を検出する機構を付加し、エンジ
ン始動前および始動中の蓄電池の端子電圧の検出結果に
関し、エンジンブロック温度が一定温度以下であると共
に、外気温度とエンジンブロック温度との温度差が所定
値以下である場合のみ検出結果を採用するようにしたこ
とを特徴とするものである。Means for Solving the Problems The present invention has been made to solve these conventional problems, and focuses on the correlation between the terminal voltage of the storage battery before and during engine startup. A mechanism for detecting the terminal voltage of the storage battery before starting the engine and the terminal voltage of the storage battery during engine starting, and a mechanism for storing the detection results by the detection mechanism and detecting the terminal voltage of the storage battery before starting the engine and the terminal voltage of the storage battery during engine starting from the stored contents. A mechanism that approximates the relationship with voltage as a linear relationship, and if the detection result at any point deviates from the linear relationship determined by the approximate calculation means by more than a predetermined reference value, the charging voltage of the alternator is increased and the It is characterized by displaying a battery life deterioration notice warning on the warning-display means when the deviation by more than the value occurs continuously for more than a predetermined number of times, and furthermore, it detects the engine block temperature and the outside air temperature. A mechanism is added to detect the terminal voltage of the storage battery before and during engine startup, only when the engine block temperature is below a certain temperature and the temperature difference between the outside air temperature and the engine block temperature is below a predetermined value. This method is characterized in that the detection results are used.
作用
このような本発明の構成によれば、エンジン始動時に蓄
電池の来歴を考慮しつつ、エンジン始動前の蓄電池の端
子電圧とエンジン始動中の蓄電池の端子電圧より、蓄電
池の状態に関して充放電アンバランスによる単なる容量
低下、寿命劣化による容量低下、容量良好等の判定を下
して、充電電圧を上昇させたり、寿命劣化による容量低
下の場合には、そのまま継続使用するとエンジンの再始
動が困難になったり、走行中にエンストしたりする可能
性を予告警報することとなる。According to the configuration of the present invention, when the engine is started, the history of the storage battery is taken into consideration, and the charge/discharge imbalance regarding the state of the storage battery is determined based on the terminal voltage of the storage battery before engine startup and the terminal voltage of the storage battery during engine startup. If the charging voltage is determined to be simple, such as a simple decrease in capacity due to deterioration of life, a decrease in capacity due to deterioration of life, or a good capacity, the charging voltage may be increased, or if the capacity decrease is due to deterioration of life, continued use will make it difficult to restart the engine. This will give advance notice of the possibility of the engine stalling or stalling while driving.
実施例
第１図は本発明の一実施例を示した回路ブロック図であ
る。まず、構成を説明すると、１は蓄電池であり、エン
ジン始動時にはスタータ２を駆動すると共に、エンジン
始動後はオルタネータ３に負荷とともに並列に接続され
、オルタネータ３より充電を受ける。Embodiment FIG. 1 is a circuit block diagram showing an embodiment of the present invention. First, to explain the configuration, reference numeral 1 is a storage battery, which drives the starter 2 when the engine is started, and is connected in parallel with the load to the alternator 3 after the engine is started, and is charged by the alternator 3.
４は蓄電池に直列に挿入したエンジン始動時の電流検出
用シャント抵抗であり、その電圧出力は電圧・温度検出
回路５に入力され、エンジン始動中の蓄電池の端子電圧
Ｖｃの測定が予め定めた電流値、例えば１５０Ａで常に
行われるようにしている。なお、１４はエンジンブロッ
クおよび車体にセットされた温度測定素子である。4 is a shunt resistor inserted in series with the storage battery for detecting the current when starting the engine, and its voltage output is input to the voltage/temperature detection circuit 5. It is always set to a value of 150A, for example. Note that 14 is a temperature measuring element set in the engine block and the vehicle body.
エンジン始動前の蓄電池の端子電圧■ｂ、エンジン始動
中の蓄電池の端子電圧Ｖｃおよびエンジンブロック温度
Ｔａ 、外気温度ＴＣは電圧・温度検出回路５によりモ
ニターされ、Ａ／Ｄ変換回路６を経て蓄電池の状態判定
回路７の入力となっている。The terminal voltage b of the storage battery before starting the engine, the terminal voltage Vc of the storage battery during engine starting, the engine block temperature Ta, and the outside air temperature TC are monitored by the voltage/temperature detection circuit 5, It serves as an input to the state determination circuit 7.
蓄電池の状態判定回路７はマイクロコンピュータによる
演算手段により構成されている。 Ａ／Ｄ変換回路によ
りデジタル信号に変換されたｖｂ。The storage battery state determination circuit 7 is composed of arithmetic means using a microcomputer. vb converted into a digital signal by an A/D conversion circuit.
Ｖｃはマイクロコンピュータ８に入力する。マイクロコ
ンピュータ８は演算手段としてのＣＰＵ９、入力データ
を一時記憶するＲＡＭｌ０および蓄電池の寿命劣化を予
告警報するための処理プログラムを固定的に記憶したＲ
ＯＭＩＩを備えており、蓄電池寿命劣化予告警報表示装
置１３の駆動回路１２と共に状態判定回路７を構成して
いる。Vc is input to the microcomputer 8. The microcomputer 8 includes a CPU 9 as a calculation means, a RAM 10 for temporarily storing input data, and a RAM 10 that permanently stores a processing program for warning of deterioration of the life of the storage battery.
It is equipped with an OMII, and constitutes the state determination circuit 7 together with the drive circuit 12 of the storage battery life deterioration warning display device 13.
次にＣＰＵ９を中心に構成されている状態判定回路７の
動作を第３図のフローチャートに基づいて具体的に説明
する。Next, the operation of the state determination circuit 7 mainly composed of the CPU 9 will be explained in detail based on the flowchart shown in FIG.
ＣＰＵは常にエンジンの始動を監視しており、キースイ
ッチＯＮの信号によりステップ１５でエンジン始動前の
蓄電池の端子電圧ｖｂおよびエンジンブロック温度Ｔａ
、外気温度Ｔｃを読み込む。The CPU constantly monitors the engine starting, and in step 15, in response to the key switch ON signal, the storage battery terminal voltage vb and the engine block temperature Ta are determined before the engine starts.
, reads the outside air temperature Tc.
引き続いてシャント抵抗４の出力電圧で始動中の電流を
モニターして予め定めた電流値、例えば１５０Ａで予め
定めた時間範囲内例えば０．２秒±０．１秒の範囲で蓄
電池の端子電圧Ｖｃを読み込む、読み込んだ電圧Ｖｂ、
Ｖｃはエンジンブロック温度Ｔａが予め定めた温度Ｔｂ
以下であると共に、外気温度とエンジンブロック温度と
の温度差が予め定めた温度Ｔｄ以下の場合のみ、蓄電池
電圧ｖｂ、ｖＣに前回走行の来歴の影響が少ないと判断
してＣＰＵの働きによりステップ１６でＲＡＭｌ０に蓄
電池の状態データとして蓄積される。エンジン始動前の
蓄電池電圧とエンジン始動中の蓄電池電圧の相関性は、
車両停止直後には不安定であり、正確な相関データの蓄
積には蓄電池に車両走行の来歴が残っていない状態でデ
ータを収集することが望ましい、来歴の影響が減少して
いる指標として、エンジンブロック温度の低下の確認お
よび外気温度とエンジンブロック温度との温度差の確認
は有効であり、データの信頼性を向上させることができ
る。蓄電池の状態データは過去１０回まで蓄積し、最新
のｖ ｂ、 ｖ ｃのデータを読み込んだ時点で一番古
いデータは抹消される。Subsequently, the current during starting is monitored using the output voltage of the shunt resistor 4, and the terminal voltage Vc of the storage battery is adjusted to a predetermined current value, for example, 150A, within a predetermined time range, for example, within a range of 0.2 seconds ± 0.1 seconds. Read the read voltage Vb,
Vc is the temperature Tb that is predetermined by the engine block temperature Ta.
and only when the temperature difference between the outside air temperature and the engine block temperature is below the predetermined temperature Td, it is determined that the storage battery voltages vb and vC are not affected by the history of the previous run, and the CPU operates to step 16. The data is stored in RAMl0 as battery status data. The correlation between the storage battery voltage before engine startup and the storage battery voltage during engine startup is as follows:
Immediately after the vehicle stops, it is unstable, and in order to accumulate accurate correlation data, it is desirable to collect data when there is no history of vehicle driving remaining in the storage battery.As an indicator that the influence of history is decreasing, the engine Confirming the decrease in the block temperature and confirming the temperature difference between the outside air temperature and the engine block temperature are effective and can improve the reliability of the data. The storage battery status data is accumulated up to the past 10 times, and the oldest data is deleted when the latest v b and v c data are read.
引き続き、ＣＰＵはステップ１７でＶｂ、ＶＣを直線関
係と看做して近似計算を行ない、ＶＣ＝ＡＸｖｂ ＋Ｃ
（７）関係を求め、Ａ、Ｃの値をＲＡＭｌ０内に記憶す
る。Subsequently, in step 17, the CPU performs approximate calculation regarding Vb and VC as having a linear relationship, and VC=AXvb +C
(7) Find the relationship and store the values of A and C in RAM10.
ＣＰＵはエンジン始動が行なわれて、Ｖｂ、Ｖｃのデー
タ更新がある毎に上記直線近似計算を行ない、ＲＡＭ内
のＡ、Ｃの値を更新する。The CPU performs the linear approximation calculation described above every time the engine is started and the data of Vb and Vc is updated, and updates the values of A and C in the RAM.
蓄電池は容量の低下とともにＶ ｂ、 Ｖ ｃの値が低
下する。この関係を示したのが第３図であり、Ｖｂ、Ｖ
Ｃの間には直線関係が存在する。As the capacity of the storage battery decreases, the values of V b and V c decrease. Figure 3 shows this relationship, where Vb, V
A linear relationship exists between C.
ところが、蓄電池の容量低下が寿命劣化によって起って
いる場合には、Ｖｂ、ＶＣの相関関係にズレが生じて、
ｖｂが高くてもＶｃの値がそれほど高くない状態を呈す
ることになる。これは上記関係式において、係数Ａ、Ｃ
の減少およびＶｃの低下を意味しており、Ａ、Ｃの値の
基準値よりのズレの度合いおよびＶｃの低下度合いによ
り蓄電池の寿命劣化度を評価することができる。However, if the capacity of the storage battery decreases due to deterioration of its lifespan, there will be a deviation in the correlation between Vb and VC.
Even if vb is high, the value of Vc is not so high. This is the coefficient A, C in the above relational expression.
and a decrease in Vc, and the degree of deterioration in the life of the storage battery can be evaluated based on the degree of deviation of the values of A and C from the reference values and the degree of decrease in Vc.
ステップ１８〜２０でＣＰＵは更新済の値Ａ、Ｃおよび
ＶｃをＲＯＭ９内に予め記憶しである値、例えばＡｏ
＝ １． Ｃｏ ＝−３，５Ｖ、 Ｖ ｃｏ ＝ ９．
８Ｖと比較して、これらの値に更新済の値が満たない場
合にはステップ２２で充″を電圧を上昇させ、蓄電池の
容量回復を計る。この状態で一定時間走行後、ＣＰＵは
次のエンジン始動時、再びステップ１５より状態判定を
反復する。ステップ２１ではＡ、Ｃ。In steps 18 to 20, the CPU stores the updated values A, C, and Vc in the ROM 9 in advance, and stores a certain value, for example, Ao.
= 1. Co = -3.5V, Vco = 9.
8V, and if the updated values do not meet these values, the charging voltage is increased in step 22 to recover the capacity of the storage battery. After running in this state for a certain period of time, the CPU starts the next step. When the engine is started, the state determination is repeated again from step 15. In step 21, A and C are selected.
Ｖｃの異常発生回数をカウントしており、充電電圧の上
昇にもかかわらず異常発生が連続して３回起った場合に
はＣＰＵは駆動回路１２を働かせて、蓄電池寿命劣化予
告警報表示装置１３に寿命劣化の予告警報を表示させる
。The number of occurrences of abnormality in Vc is counted, and if abnormality occurs three times in a row despite the rise in charging voltage, the CPU activates the drive circuit 12 to display the battery life deterioration warning display device 13. display a warning warning of life deterioration.
発明の詳細
な説明したように、本発明によればエンジン始動時の蓄
電池の端子電圧の変化から蓄電池の寿命劣化状態を判定
し、走行に移る前に余裕をもって信頼性の高い寿命劣化
警報を出すこととなり、寿命劣化によるエンジンの始動
不能、走行中のエンストといったトラブルの大幅な軽減
が可能であり、蓄電池の信頼性を向上させることができ
る。As described in detail, according to the present invention, the life deterioration state of the storage battery is determined from the change in the terminal voltage of the storage battery when the engine is started, and a highly reliable life deterioration warning is issued well in advance of driving. This makes it possible to significantly reduce problems such as engine inability to start due to life deterioration and engine stalling while driving, and improve the reliability of the storage battery.
第１図は本発明寿命判定方法の一実施例を示す回路ブロ
ック図、第２図は状態判定回路の動作を示す演算流れ図
、第３図はエンジン始動前の蓄電池の端子電圧ｖｂとエ
ンジン始動中の蓄電池の端子電圧Ｖｃとの関係を示す特
性グラフである。
１・・・・・・蓄電池 ２・・・・・・スター
タ３・・・・・・オルタネータ ４・・・・・・シャ
ント抵抗５・・・・・・温度検出回路 ６・・・・・
・Ａ／Ｄ変換回路７・・・・・・状態判定回路
８・・・・・・マイクロコンピュータ
９・・・・・・ＣＰＵ １０・・・・・・ＲＡ
Ｍ１１・・・・・・ＲＯＭ １２・・・・・・
駆動回路１３・・・・・・蓄電池寿命劣化予告警報表示
装置１４・・・・・・エンジンブロック温度および外気
温度測定素子
オ １ 因Fig. 1 is a circuit block diagram showing an embodiment of the lifespan judgment method of the present invention, Fig. 2 is a calculation flow chart showing the operation of the state judgment circuit, and Fig. 3 is a graph showing terminal voltage vb of the storage battery before starting the engine and during engine starting. It is a characteristic graph which shows the relationship with the terminal voltage Vc of the storage battery. 1... Storage battery 2... Starter 3... Alternator 4... Shunt resistor 5... Temperature detection circuit 6...
・A/D conversion circuit 7... Status determination circuit 8... Microcomputer 9... CPU 10... RA
M11...ROM 12...
Drive circuit 13...Battery life deterioration notice warning display device 14...Engine block temperature and outside air temperature measuring element 1.
Claims (2)
を検出する機構と、該検出機構による検出結果を記憶し
て記憶内容からエンジン始動前と始動中の蓄電池の端子
電圧の関係を直線関係として近似計算する機構を設け、
任意の時点の検出結果が近似計算手段より求めた直線関
係より基準値以上ズレる場合にはオルタネータの充電電
圧を上昇させ、基準値以上ズレる場合が所定回数以上連
続して発生する場合には警告表示手段に蓄電池寿命劣化
予告警報を表示させることを特徴とする自動車用蓄電池
の寿命判定方法。(1) A mechanism that detects the terminal voltage of the storage battery before and during engine startup, and the detection results by the detection mechanism are stored and the relationship between the terminal voltages of the storage battery before and during engine startup is determined as a linear relationship based on the stored contents. A mechanism for approximate calculation is provided,
If the detection result at any point deviates from the linear relationship determined by the approximate calculation means by more than a reference value, the charging voltage of the alternator is increased, and if the deviation by more than the reference value occurs more than a predetermined number of times in a row, a warning is displayed. A method for determining the lifespan of a storage battery for an automobile, characterized in that the means displays a battery life deterioration notice warning.
機構を付加し、エンジン始動前および始動中の蓄電池の
端子電圧の検出結果に関し、エンジンブロック温度が一
定温度以下であると共に外気温度とエンジンブロック温
度との温度差が所定値以下である場合のみ検出結果を採
用することを特徴とする特許請求の範囲第（１）項記載
の自動車用蓄電池の寿命判定方法。(2) A mechanism for detecting engine block temperature and outside air temperature is added, and the detection result of the terminal voltage of the storage battery before and during engine starting is determined to indicate that the engine block temperature is below a certain temperature and that the outside air temperature and engine block temperature are different. The method for determining the lifespan of an automobile storage battery according to claim 1, wherein the detection result is adopted only when the temperature difference between the two is less than or equal to a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63229469A JP2731850B2 (en) | 1988-09-13 | 1988-09-13 | How to judge the life of an automotive storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63229469A JP2731850B2 (en) | 1988-09-13 | 1988-09-13 | How to judge the life of an automotive storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0277668A true JPH0277668A (en) | 1990-03-16 |
| JP2731850B2 JP2731850B2 (en) | 1998-03-25 |
Family
ID=16892684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63229469A Expired - Lifetime JP2731850B2 (en) | 1988-09-13 | 1988-09-13 | How to judge the life of an automotive storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2731850B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997020225A1 (en) * | 1994-05-31 | 1997-06-05 | Omron Corporation | Device and method for estimating remaining life of battery |
| CN107076803A (en) * | 2014-11-19 | 2017-08-18 | 株式会社杰士汤浅国际 | The managing device of secondary cell and the management method of secondary cell |
| CN111929599A (en) * | 2020-07-16 | 2020-11-13 | 上海星融汽车科技有限公司 | Vehicle storage battery state monitoring system and vehicle thereof |
-
1988
- 1988-09-13 JP JP63229469A patent/JP2731850B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997020225A1 (en) * | 1994-05-31 | 1997-06-05 | Omron Corporation | Device and method for estimating remaining life of battery |
| US6317697B1 (en) | 1995-11-29 | 2001-11-13 | Omron Corporation | Battery life determination apparatus and battery life determination method |
| CN107076803A (en) * | 2014-11-19 | 2017-08-18 | 株式会社杰士汤浅国际 | The managing device of secondary cell and the management method of secondary cell |
| CN107076803B (en) * | 2014-11-19 | 2021-07-13 | 株式会社杰士汤浅国际 | Management device for secondary battery and management method for secondary battery |
| CN111929599A (en) * | 2020-07-16 | 2020-11-13 | 上海星融汽车科技有限公司 | Vehicle storage battery state monitoring system and vehicle thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2731850B2 (en) | 1998-03-25 |
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