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JP2006137316A - Vehicle power management device - Google Patents

Vehicle power management device
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Publication number
JP2006137316A
JP2006137316AJP2004328955AJP2004328955AJP2006137316AJP 2006137316 AJP2006137316 AJP 2006137316AJP 2004328955 AJP2004328955 AJP 2004328955AJP 2004328955 AJP2004328955 AJP 2004328955AJP 2006137316 AJP2006137316 AJP 2006137316A
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battery
lead
value
internal resistance
deterioration
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Japanese (ja)
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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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Abstract

Translated fromJapanese

【課題】自動車の放置可能期間をユーザーに報知する。
【解決手段】自動車に搭載される例えば鉛バッテリ11の電池残量と劣化度をバッテリ状態検知部13で検知し、そのうちの電池残量に基づいて、放置可能期間演算処理部17により自動車の放置可能期間を演算し、この放置可能期間を表示装置15に表示する。ユーザーは、表示装置15の画面31に表示された放置可能日数の情報を視認するだけで、あとどのくらいの期間だけ自動車を放置してもよいかを容易に認識でき、長期放置による自動車のバッテリ切れを容易に防ぐことが可能となる。併せて、鉛バッテリ11の電池残量と劣化度を表示装置15に表示する。
【選択図】図7
To notify a user of a period during which an automobile can be left unattended.
For example, a remaining battery level and a degree of deterioration of a lead battery mounted on a vehicle are detected by a battery state detection unit. Based on the remaining battery level, an abandonable period calculation processing unit 17 leaves the vehicle. The possible period is calculated, and this neglectable period is displayed on the display device 15. The user can easily recognize how long the car can be left by simply viewing the information of the number of days that can be left displayed on the screen 31 of the display device 15. Can be easily prevented. In addition, the remaining battery level and the degree of deterioration of the lead battery 11 are displayed on the display device 15.
[Selection] Figure 7

Description

Translated fromJapanese

本発明は車両電源管理装置に関するものである。  The present invention relates to a vehicle power management device.

自動車においては、図8の如く、エンジン1が回転しているときに、発電機3によってエンジン1の回転力を電流エネルギーに変換し、ここで発生した電力を各種の負荷5に供給するとともに、余剰の電力を用いて電池(バッテリ)7の充電を図る。  In the automobile, as shown in FIG. 8, when theengine 1 is rotating, thegenerator 3 converts the rotational force of theengine 1 into current energy and supplies the generated electric power tovarious loads 5. The battery (battery) 7 is charged using surplus power.

また、自動車のエンジン1は、スタータ9の駆動により始動するが、このスタータ9の駆動を行うためには、電池7から充分な始動電圧が供給される必要がある。したがって、自動車が駐停車される際には、その後にスタータ9を駆動してエンジン1を始動させることが可能なように、電池7の充電を充分に行っておく必要がある。  In addition, theautomobile engine 1 is started by driving thestarter 9, and a sufficient starting voltage needs to be supplied from thebattery 7 in order to drive thestarter 9. Therefore, when the automobile is parked or stopped, it is necessary to sufficiently charge thebattery 7 so that theengine 1 can be started by driving thestarter 9 thereafter.

自動車においては、エンジン1を停止させてキーを抜いても、自動車に搭載されている各種の電子制御ユニット内のデータ等のバックアップや、時計及びオーディオ等の電源として微量の電気が使われており、自動車を使用しない状況でも電池7の電力消費が行われる。したがって、最後に自動車の主電源のスイッチをオフにした時点で、電池7が充分に充電されていても、自動車を走行させずに長期間に亘って放置すると、暗電流によって電池7の残量が減少し、次に自動車を走行させようとしても、スタータ9の駆動が不可能となるおそれがある。  In automobiles, even if theengine 1 is stopped and the key is removed, a small amount of electricity is used as a backup for data in various electronic control units installed in the automobile and as a power source for watches and audio. Even when the automobile is not used, thebattery 7 consumes power. Therefore, even if thebattery 7 is sufficiently charged when the main power switch of the automobile is turned off last time, if the automobile is left unattended for a long period of time without being driven, the remaining amount of thebattery 7 is reduced by dark current. However, thestarter 9 may not be able to be driven even if the automobile is driven next.

また、電池7の極板とバッテリ液とが直接反応して徐々に硫酸鉛等になったり、また鉛よりも水素過電圧の小さい金属(たとえばアンチモン)が存在する場合は、その金属がマイナス極板の表面に付着して局部電池を形成したりして、自己放電が起きることが知られている。このような自己放電によっても電池7の残量が減少する。このため、自動車を長期間放置すると、次の自動車の走行時にスタータ9の駆動が不可能となるおそれがある。  Further, when the electrode plate of thebattery 7 and the battery solution react directly to gradually change to lead sulfate or the like, or when a metal having a hydrogen overvoltage smaller than lead (for example, antimony) is present, the metal is the negative electrode plate. It is known that self-discharge occurs when a local battery is formed by adhering to the surface of the substrate. Such self-discharge also reduces the remaining amount of thebattery 7. For this reason, if the automobile is left for a long period of time, thestarter 9 may not be able to be driven when the next automobile travels.

しかしながら、従来では、上記のような暗電流や電池7の自己放電などを考慮した場合に、自動車の放置がどの程度の期間可能であるかを、ユーザーに報知することがなされていなかった。  However, conventionally, in consideration of the dark current and the self-discharge of thebattery 7 as described above, it has not been possible to notify the user of how long a car can be left.

そこで、本発明の課題は、自動車の放置がどの程度の期間可能であるかをユーザーに報知することが可能な車両電源管理装置を提供することにある。  Therefore, an object of the present invention is to provide a vehicle power supply management apparatus capable of notifying a user of how long a car can be left unattended.

上記課題を解決すべく、請求項1に記載の発明は、自動車に搭載される電池の少なくとも電池残量を検知するバッテリ状態検知部と、前記バッテリ状態検知部で検知された電池残量に基づいて自動車の放置可能期間を演算する放置可能期間演算処理部と、前記放置可能期間演算処理部で演算された前記放置可能期間を報知する報知装置とを備えるものである。  In order to solve the above problem, the invention according toclaim 1 is based on a battery state detection unit that detects at least a remaining battery level of a battery mounted on an automobile, and a remaining battery level detected by the battery state detection unit. A neglectable period calculation processing unit for calculating the negligible period of the automobile, and a notification device for informing the neglectable period calculated by the neglectable period calculation processing unit.

請求項2に記載の発明は、請求項1に記載の車両電源管理装置であって、前記報知装置が、前記電池残量を併せて報知するものである。  A second aspect of the present invention is the vehicle power management apparatus according to the first aspect, wherein the notification device also notifies the remaining battery level.

請求項3に記載の発明は、請求項1または請求項2に記載の車両電源管理装置であって、前記バッテリ状態検知部が、前記電池の劣化度を検知し、前記報知装置が、前記劣化度を併せて報知するものである。  A third aspect of the present invention is the vehicle power management apparatus according to the first or second aspect, wherein the battery state detection unit detects a degree of deterioration of the battery, and the notification apparatus detects the deterioration. The degree is also notified.

請求項1に記載の発明の車両電源管理装置は、自動車に搭載される電池の電池残量をバッテリ状態検知部で検知し、この電池残量に基づいて放置可能期間演算処理部が自動車の放置可能期間を演算し、この放置可能期間を報知装置で報知するので、ユーザーは、あとどのくらいの期間だけ自動車を放置してもよいかを容易に認識できる。したがって、長期放置による自動車のバッテリ切れを容易に防止することが可能となる。  In the vehicle power management device according to the first aspect of the present invention, the remaining battery level of the battery mounted on the vehicle is detected by the battery state detection unit, and the neglectable period calculation processing unit is based on the remaining battery level. Since the possible period is calculated and this neglectable period is notified by the notification device, the user can easily recognize how long the car can be left unattended. Therefore, it is possible to easily prevent the vehicle from running out of battery due to being left for a long time.

請求項2に記載の発明の車両電源管理装置は、報知装置が、放置可能期間の情報に加えて電池残量を併せて報知するので、ユーザーは電池の状態を多面的に認識することができ、例えば、放置可能期間が短い場合で電池残量も少ない場合に、一部の車載電装品のスイッチをオフにするなどして消費電力を抑えて運転すれば、放置可能日数を増大させることができるかも知れない、といった有益な情報を得ることができる。  In the vehicle power management device according to the second aspect of the invention, the notification device notifies the battery remaining amount in addition to the information on the neglectable period, so that the user can recognize the state of the battery in a multifaceted manner. For example, if the battery can be left for a short period of time and the remaining battery level is low, turning off some of the in-vehicle electrical components to reduce power consumption can increase the number of days that can be left unattended. You can get useful information that you might be able to.

請求項3に記載の発明の車両電源管理装置は、報知装置が、電池の劣化度を併せて報知するので、ユーザーは、放置可能期間を増大させるために電池の交換を行うことが望ましい、といった有益な情報を報知装置から容易に得ることができる。  In the vehicle power management device according to the third aspect of the invention, since the notification device notifies the deterioration degree of the battery together, it is desirable that the user replaces the battery in order to increase the neglectable period. Useful information can be easily obtained from the notification device.

図1は本発明の一の実施の形態に係る車両電源管理装置を示すブロック図である。尚、この実施の形態では、電池として鉛バッテリ11が搭載された例を挙げて説明を行う。  FIG. 1 is a block diagram showing a vehicle power supply management apparatus according to an embodiment of the present invention. In this embodiment, an example in which alead battery 11 is mounted as a battery will be described.

この車両電源管理装置は、図1の如く、車両に搭載される鉛バッテリ(電池)11の状態(電池残量または劣化度)を検知するバッテリ状態検知部13と、車室内に設置された報知装置としての表示装置15と、バッテリ状態検知部13での検知結果に基づいて自動車の放置可能期間を演算して表示装置15に表示(報知)するよう出力する放置可能期間演算処理部17とを備える。  As shown in FIG. 1, the vehicle power supply management device includes a batterystate detection unit 13 that detects a state (remaining battery level or degree of deterioration) of a lead battery (battery) 11 mounted on the vehicle, and a notification installed in the vehicle interior. A display device 15 serving as a device, and a neglectable periodcalculation processing unit 17 that calculates a negligible period of the vehicle based on the detection result of the batterystate detection unit 13 and outputs the result to display (notify) the display device 15 Prepare.

尚、バッテリ状態検知部13及び放置可能期間演算処理部17は、内部にROM(例えばフラッシュROM等)、RAM及びCPUを備えた車載電子制御ユニットとしてまとまって構成され、ROM内に予め格納されたソフトウェアプログラムに従って動作する機能要素である。  The batterystate detection unit 13 and the neglectable periodcalculation processing unit 17 are configured as a vehicle-mounted electronic control unit including a ROM (for example, a flash ROM), a RAM, and a CPU, and are stored in advance in the ROM. A functional element that operates according to a software program.

バッテリ状態検知部13は、図1に示すように、電流検出部21と、電圧検出部23と、CPU等により構成される電池状態検知処理部25とを備えて構成され、車両に搭載される鉛バッテリ11の状態、即ち、鉛バッテリ11の電池残量及び劣化度を検知する。ここで、電池残量とは、鉛バッテリ11の満充電時を基準とした放電可能な電荷量を示し、劣化度とは経年変化による鉛バッテリ11の劣化の度合いを示している。  As shown in FIG. 1, the batterystate detection unit 13 includes a current detection unit 21, avoltage detection unit 23, and a battery state detection processing unit 25 configured by a CPU and the like, and is mounted on a vehicle. The state of thelead battery 11, that is, the remaining battery level and the degree of deterioration of thelead battery 11 are detected. Here, the remaining battery level indicates the amount of charge that can be discharged with reference to when thelead battery 11 is fully charged, and the degree of deterioration indicates the degree of deterioration of thelead battery 11 due to secular change.

電流検出部21は、鉛バッテリ11のプラス端子に接続される充放電用の通電路29に介挿されており、鉛バッテリ11に対して充電または放電される電流を検出する。電圧検出部23は、鉛バッテリ11の端子電圧を検出する。  The current detection unit 21 is inserted in a charging /discharging energization path 29 connected to the plus terminal of thelead battery 11, and detects a current charged or discharged to thelead battery 11. Thevoltage detector 23 detects the terminal voltage of thelead battery 11.

電池状態検知処理部25は、鉛バッテリ11に対する充電または放電が開始された際に、電流検出部21を介して検出されるその充放電の電流値と、電圧検出部23を介して検出されるその充放電の開始の前後における端子電圧の変化量とに基づいて、鉛バッテリ11の電池残量及び劣化度を検知する。鉛バッテリ11に対する充電または放電の開始の電池状態検知処理部25による検知は、例えば電流検出部21による充放電電流の検出に基づいて行われる。  The battery state detection processing unit 25 detects the charge / discharge current value detected through the current detection unit 21 and thevoltage detection unit 23 when charging or discharging of thelead battery 11 is started. Based on the amount of change in terminal voltage before and after the start of charging / discharging, the remaining battery level and the degree of deterioration of thelead battery 11 are detected. Detection by the battery state detection processing unit 25 at the start of charging or discharging of thelead battery 11 is performed based on, for example, detection of a charge / discharge current by the current detection unit 21.

尚、図2は、例えば鉛バッテリ11の放電時における鉛バッテリ11の電流値及び端子電圧の時系列的な変化の例を示す図であって、横軸は時間、縦軸は電流値及び電圧値、符号L1は鉛バッテリ11の電流値の変化、符号L2は鉛バッテリ11の端子電圧の変化を示している。電池状態検知処理部25は、図2に示した鉛バッテリ11の電流値L1及び端子電圧L2を、電流検出部21及び電圧検出部23から個別に受け取る。  FIG. 2 is a diagram illustrating an example of time-series changes in the current value and terminal voltage of thelead battery 11 when thelead battery 11 is discharged, for example, the horizontal axis is time, and the vertical axis is current value and voltage. The value, symbol L1 indicates a change in the current value of thelead battery 11, and symbol L2 indicates a change in the terminal voltage of thelead battery 11. The battery state detection processing unit 25 individually receives the current value L1 and the terminal voltage L2 of thelead battery 11 illustrated in FIG. 2 from the current detection unit 21 and thevoltage detection unit 23.

ここで、図3は、鉛バッテリに対して種々の電流値で充放電が行われた際の端子電圧の変化状況を計測した結果を示すグラフである。図3の試験では、開放端子電圧がその電池残量に対応する値に安定した状態にある鉛バッテリ11に対して、開放端子電圧(電池残量)を種々に異ならせて種々のレベルの充放電を行わせ、その各充放電の開始直後(例えば、充放電の開始から100ms後(充放電は継続中))における端子電圧を計測した。図3のグラフの横軸は開放端子電圧に対応し、縦軸は充放電の開始直後の端子電圧に対応している。そして、図3のグラフG1a〜G1cの各系列は、各開放端子電圧において5A、10A、15Aの充電を行った際の充電開始から微小時間後(例えば、100ms後)の端子電圧の計測結果に対応しており、グラフG2a〜G2cの各系列は、各開放端子電圧において5A、10A、15Aの放電を行った際の放電開始から微小時間後(例えば、100ms後)の端子電圧の計測結果に対応している。また、グラフG3の系列は、充放電を行わないとき(端子電圧の変化がないとき)の状態を参考として表したものである。  Here, FIG. 3 is a graph showing a result of measuring a change state of the terminal voltage when charging / discharging the lead battery at various current values. In the test of FIG. 3, the open terminal voltage (remaining battery level) is varied differently for thelead battery 11 in which the open terminal voltage is stable at a value corresponding to the remaining battery level. The terminal voltage immediately after the start of each charge / discharge (for example, 100 ms after the start of charge / discharge (charging / discharging is continuing)) was measured. The horizontal axis of the graph of FIG. 3 corresponds to the open terminal voltage, and the vertical axis corresponds to the terminal voltage immediately after the start of charging / discharging. Each series of the graphs G1a to G1c in FIG. 3 shows the terminal voltage measurement results after a very short time (for example, after 100 ms) from the start of charging when charging 5A, 10A, and 15A at each open terminal voltage. Each series of graphs G2a to G2c corresponds to the measurement result of the terminal voltage after a minute time (for example, after 100 ms) from the start of discharge when discharging 5A, 10A, and 15A at each open terminal voltage. It corresponds. The series of graph G3 shows the state when charging / discharging is not performed (when there is no change in terminal voltage) as a reference.

図3の試験結果より、開放端子電圧が比較的高い状態、即ち、電池残量が大きい状態(例えば、図3のA1で示す領域)では、開放端子電圧が高いほど(即ち、電池残量が大きいほど)、充放電(特に、充電)に対する鉛バッテリ11の端子電圧の変化量が大きいことが分かる。これより、充放電時の電流値と端子電圧の変化量とに基づいて、少なくとも鉛バッテリ11の電池残量が推定可能であることが分かる。  From the test results in FIG. 3, in a state where the open terminal voltage is relatively high, that is, in a state where the remaining battery level is large (for example, the area indicated by A1 in FIG. 3), the higher the open terminal voltage (that is, the remaining battery level is). It can be seen that as the value increases, the amount of change in the terminal voltage of thelead battery 11 with respect to charging / discharging (particularly charging) increases. From this, it can be seen that at least the remaining battery level of thelead battery 11 can be estimated based on the current value during charging and discharging and the amount of change in the terminal voltage.

あるいは、上記のような実験値を用いずに、一般的に知られたネルンストの式等の電気化学式を用いて開放端子電圧に基づいて電池残量を演算したり、充電電流及び放電電流の積算値を演算して電池残量を演算してもよい。  Alternatively, without using the experimental values as described above, the remaining battery level is calculated based on the open terminal voltage using an electrochemical equation such as the Nernst equation that is generally known, and the charge current and discharge current are integrated. A battery level may be calculated by calculating a value.

また、これらの数量値は、次に述べるように鉛バッテリ11の劣化度にも大きく関係しており、これらの数量値に基づいて鉛バッテリ11の劣化度も推定可能である。  Moreover, these quantity values are greatly related to the deterioration degree of thelead battery 11 as described below, and the deterioration degree of thelead battery 11 can be estimated based on these quantity values.

図4は、劣化度の異なる2種類の鉛バッテリについて充放電に伴う端子電圧の変化量を比較したグラフである。より詳細には、図4のグラフG11は、電池残量が約80%の新品の鉛バッテリ11に対して電流値を変化させつつ充放電を行わせて、充放電時の端子電圧の変化量を計測した結果を示し、グラフG12は、電池残量が約75%の劣化品の鉛バッテリ11に対して電流値を変化させつつ充放電を行わせて、充放電時の端子電圧の変化量を計測した結果を示している。  FIG. 4 is a graph comparing the amount of change in terminal voltage associated with charging / discharging for two types of lead batteries having different degrees of deterioration. More specifically, the graph G11 in FIG. 4 shows the amount of change in the terminal voltage during charging / discharging by charging / discharging thenew lead battery 11 with about 80% remaining battery power while changing the current value. The graph G12 shows the amount of change in the terminal voltage during charging / discharging by charging / discharging the deterioratedlead battery 11 having a remaining battery level of about 75% while changing the current value. The measurement result is shown.

図4のグラフより、電池残量が同レベルであれば、各レベルの充放電に対する端子電圧の変化量が、新品より劣化品の方が大きくなっていることが分かる。  From the graph of FIG. 4, it can be seen that if the remaining battery level is the same level, the amount of change in the terminal voltage with respect to charging and discharging at each level is larger in the deteriorated product than in the new product.

この実施の形態では、鉛バッテリ11の電池残量及び劣化度を推定するためのさらに有利な数量指標を取得するため、電池状態検知処理部25に、充放電時の電流値と端子電圧の変化量とに基づいてその時点における鉛バッテリ11の内部抵抗値を導出させるようにしている。内部抵抗値Rinの導出は、例えば充放電時の電流値I及び端子電圧の変化量dVを用いて、オームの法則に基づく、
Rin=dV/I
の関係式により行うことができる。
In this embodiment, in order to obtain a more advantageous quantity index for estimating the remaining battery level and the degree of deterioration of thelead battery 11, the battery state detection processing unit 25 is supplied with changes in current value and terminal voltage during charging / discharging. Based on the amount, the internal resistance value of thelead battery 11 at that time is derived. The derivation of the internal resistance value Rin is based on Ohm's law using, for example, the current value I during charge / discharge and the terminal voltage variation dV.
Rin = dV / I
The following relational expression can be used.

図5は、鉛バッテリ(新品の鉛バッテリ)に対して所定電流値の充放電が行われた際の開放端子電圧と導出した内部抵抗値との関係を示すグラフであり、グラフの横軸は開放端子電圧に対応し、縦軸は内部抵抗値に対応している。より詳細には、図5のグラフG21は、異なる各開放端子電圧において10Aの充電を行った際の計測結果に基づいて導出された内部抵抗値(充電内部抵抗値)を示しており、グラフG22は、異なる各開放端子電圧において10Aの放電を行った際の計測結果に基づいて導出された内部抵抗値(放電内部抵抗値)を示している。  FIG. 5 is a graph showing the relationship between the open terminal voltage and the derived internal resistance value when charge / discharge of a predetermined current value is performed on a lead battery (new lead battery), and the horizontal axis of the graph is Corresponding to the open terminal voltage, the vertical axis corresponds to the internal resistance value. More specifically, a graph G21 in FIG. 5 shows an internal resistance value (charging internal resistance value) derived based on a measurement result when 10 A is charged at each different open-circuit voltage, and the graph G22 These show the internal resistance value (discharge internal resistance value) derived based on the measurement result when discharging 10 A at different open terminal voltages.

図5のグラフより、特に開放端子電圧の比較的高い状態において、内部抵抗値(特に、充電の際に導出した充電内部抵抗値)と開放端子電圧(電池残量)との相関が強く現れていることが分かる。  From the graph of FIG. 5, especially in a relatively high open terminal voltage state, there is a strong correlation between the internal resistance value (particularly the charge internal resistance value derived at the time of charging) and the open terminal voltage (remaining battery level). I understand that.

また、内部抵抗値は鉛バッテリ11の劣化度を評価するのに非常に有効な数量指標であるため(一般に、劣化が進むにつれて内部抵抗値が増大する)、この導出した内部抵抗値を用いて鉛バッテリ11の劣化度を推定することができる。よって、例えば、その導出した充電内部抵抗値及び放電内部抵抗値のいずれか一方、または両方に基づいて、電池状態検知処理部25に鉛バッテリ11の劣化度を検知させるようにすることができる。  Further, since the internal resistance value is a very effective quantity index for evaluating the degree of deterioration of the lead battery 11 (generally, the internal resistance value increases as the deterioration progresses), and thus the derived internal resistance value is used. The degree of deterioration of thelead battery 11 can be estimated. Therefore, for example, the battery state detection processing unit 25 can detect the degree of deterioration of thelead battery 11 based on one or both of the derived charge internal resistance value and discharge internal resistance value.

この場合、例えば、所定の閾値レベルを設け、充電内部抵抗値または放電内部抵抗値がその閾値レベルを上回ったことを検知した場合に、電池状態検知処理部25に鉛バッテリ11の劣化を報知するための報知信号を出力させるようにしてもよい。  In this case, for example, when a predetermined threshold level is provided and it is detected that the charge internal resistance value or the discharge internal resistance value exceeds the threshold level, the battery state detection processing unit 25 is notified of the deterioration of thelead battery 11. A notification signal may be output.

また、この実施の形態では、鉛バッテリ11の状態検知のためのさらに有効な数量指標を得るため、互いに近接したタイミングで取得した充電内部抵抗値と放電内部抵抗値との比を算出して状態検知に用いるようにしている。  Further, in this embodiment, in order to obtain a more effective quantity index for detecting the state of thelead battery 11, the state is calculated by calculating the ratio between the charging internal resistance value and the discharging internal resistance value acquired at timings close to each other. It is used for detection.

図6は、異なる開放端子電圧において鉛バッテリ(新品の鉛バッテリ)に所定電流値の充放電を行わせた際に取得した充電内部抵抗値と放電内部抵抗値との比の値を示すグラフである。より詳細には、図6の充電内部抵抗値と放電内部抵抗値との比の値は、異なる複数の開放端子電圧において、近似したタイミングで所定電流値(例えば、10A)の充電と放電とを鉛バッテリ11に対して行い、その充放電の際に上述の手法で充電内部抵抗値と放電内部抵抗値とを取得し、その充電内部抵抗値を放電内部抵抗値で割り算することにより導出している。図6のグラフより、開放端子電圧が比較的高い状態(電池残量が比較的多い状態)では、両内部抵抗値の比と開放端子電圧(電池残量)との間に比例関係に近い顕著な相関関係があり、両内部抵抗値の比より電池残量が推定可能であることが分かる。  FIG. 6 is a graph showing the value of the ratio between the charge internal resistance value and the discharge internal resistance value acquired when charging and discharging a lead battery (new lead battery) with a predetermined current value at different open terminal voltages. is there. More specifically, the value of the ratio between the charge internal resistance value and the discharge internal resistance value in FIG. 6 is obtained by charging and discharging a predetermined current value (for example, 10 A) at approximate timings at different open terminal voltages. It is performed on thelead battery 11, and the charge internal resistance value and the discharge internal resistance value are obtained by the above-described method at the time of charge / discharge, and the charge internal resistance value is divided by the discharge internal resistance value. Yes. From the graph of FIG. 6, in the state where the open terminal voltage is relatively high (the battery remaining amount is relatively large), the ratio between the two internal resistance values and the open terminal voltage (battery remaining amount) are significantly close to a proportional relationship. It can be seen that the remaining battery level can be estimated from the ratio between the two internal resistance values.

そこで、この実施の形態では、近接したタイミングで鉛バッテリ11に対する充電と放電とが行われた際に、電池状態検知処理部25に、その充放電を電流検出部21を介して検出させ、その充電に基づく充電内部抵抗値と放電に基づく放電内部抵抗値とを取得させる。充電内部抵抗値及び放電内部抵抗値は、上述のように、その充放電時に電流検出部21を介して検出される充放電の電流値と、電圧検出部23を介して検出されるその充放電の開始の前後における端子電圧の変化量(例えば、充放電の開始前の端子電圧と充放電が開始されてから100ms後の端子電圧との差)とに基づいて、オームの関係式等を用いて導出されて取得される。そして、電池状態検知処理部25に、その両内部抵抗値の比(例えば、充電内部抵抗値を放電内部抵抗値で割り算した値)を導出させ、その導出した両内部抵抗値の比に基づいてその時点における鉛バッテリ11の状態(特に、電池残量)を検知させるようになっている。  Therefore, in this embodiment, when thelead battery 11 is charged and discharged at close timing, the battery state detection processing unit 25 detects the charge / discharge via the current detection unit 21, and A charging internal resistance value based on charging and a discharging internal resistance value based on discharging are acquired. The charge internal resistance value and the discharge internal resistance value are, as described above, the charge / discharge current value detected via the current detection unit 21 during the charge / discharge and the charge / discharge detection detected via thevoltage detection unit 23. Based on the amount of change in the terminal voltage before and after the start of charge (for example, the difference between the terminal voltage before the start of charge / discharge and theterminal voltage 100 ms after the start of charge / discharge) Is obtained and obtained. Then, the battery state detection processing unit 25 is caused to derive a ratio between the internal resistance values (for example, a value obtained by dividing the charge internal resistance value by the discharge internal resistance value), and based on the derived ratio between the internal resistance values. The state of thelead battery 11 at that time (particularly, the remaining battery level) is detected.

ここで、両内部抵抗値の比に基づく電池残量の検知は、例えば、両内部抵抗値と電池残量との対応関係を試験により予め取得してその対応関係を示すデータ(データテーブル等)を電池状態検知処理部25の記憶部に登録しておき、その対応関係データを用いて行うことができる。  Here, the detection of the remaining battery level based on the ratio between the two internal resistance values is, for example, data (data table or the like) indicating a correspondence relationship between the internal resistance value and the remaining battery amount obtained in advance by a test. Can be registered in the storage unit of the battery state detection processing unit 25 and the correspondence relationship data can be used.

このようにして、バッテリ状態検知部13は、自動車の走行中等に鉛バッテリ11の電池残量及び劣化度を随時検知し、その検知された電池残量の値を例えば百分率の数値として放置可能期間演算処理部17及び表示装置15に出力するとともに、鉛バッテリ11の劣化度の値を例えば百分率の数値として表示装置15に出力する。  In this way, the batterystate detection unit 13 detects the remaining battery level and the degree of deterioration of thelead battery 11 at any time while the automobile is running, and the value of the detected remaining battery level can be left as a percentage value, for example. While outputting to thearithmetic processing part 17 and the display apparatus 15, the value of the deterioration degree of thelead battery 11 is output to the display apparatus 15 as a numerical value of a percentage, for example.

放置可能期間演算処理部17は、上記したバッテリ状態検知部13で演算された電池残量と、通電路29等に流れる暗電流及び鉛バッテリ11の自己放電とに基づいて放置可能期間を演算し、その演算結果の情報を表示装置15に出力する。  The neglectable periodcalculation processing unit 17 calculates the negligible period based on the remaining battery level calculated by the batterystate detection unit 13, the dark current flowing in theenergization path 29 and the like, and the self-discharge of thelead battery 11. The information of the calculation result is output to the display device 15.

ここで、暗電流は、自動車に搭載されている各種の電子制御ユニット内のデータ等のバックアップや、時計及びオーディオ等の電源として流される微量の電流であり、各自動車に搭載される車載電装品の個数や種類等によって異なるものである。したがって、この車両電源管理装置が搭載される自動車の車載電装品の数及び種類に応じて、1日当たりに流れる暗電流の量を実験値等に基づいて取得しておき、この1日当たりに流れる暗電流の量をROM(例えばフラッシュROM等)内に予め格納しておく。  Here, the dark current is a small amount of current that is used as a backup for data in various electronic control units mounted on automobiles, and as a power source for clocks, audios, and the like. It depends on the number and type of Therefore, the amount of dark current that flows per day is acquired based on experimental values, etc., according to the number and type of in-vehicle electrical components of the vehicle on which this vehicle power management device is mounted, and the dark current that flows per day is obtained. The amount of current is stored in advance in a ROM (for example, a flash ROM).

また、鉛バッテリ11の自己放電の量も、当該鉛バッテリ11について予め実験等によって得られた値が使用され、1日当たりに成される鉛バッテリ11の自己放電の量が、ROM(例えばフラッシュROM等)内に予め格納される。  Also, the amount of self-discharge of thelead battery 11 is a value obtained by experiments or the like in advance for thelead battery 11, and the amount of self-discharge of thelead battery 11 made per day is determined by the ROM (for example, flash ROM). Etc.) in advance.

そして、放置可能期間演算処理部17は、上述した1日当たりに流れる暗電流と、1日当たりに成される鉛バッテリ11の自己放電の量とに基づいて、鉛バッテリ11の1日当たりに減少する電池残量を演算し、バッテリ状態検知部13で演算された電池残量から、スタータの駆動に最低限必要な電池残量を減算した後、この減算値を、鉛バッテリ11の1日当たりに減少する電池残量で除算して、放置可能期間(放置可能日数)の値を求め、この除算結果の値を表示装置15に放置可能日数の情報として出力するようになっている。尚、放置可能日数としての除算結果の値は、小数点未満の位置で切り上げられて整数値として表示装置15に出力される。あるいは、その整数値に2〜3日等の所定の余裕日数を加算して、これを放置可能日数の情報として表示装置15に出力してもよい。  Then, the negligible periodcalculation processing unit 17 reduces the battery of thelead battery 11 per day based on the above-described dark current flowing per day and the amount of self-discharge of thelead battery 11 formed per day. After calculating the remaining amount and subtracting the minimum remaining battery level required for driving the starter from the remaining battery level calculated by the batterystate detection unit 13, this subtracted value is decreased per day for thelead battery 11. By dividing by the remaining battery level, the value of the neglectable period (the number of days that can be neglected) is obtained, and the value of the division result is output to the display device 15 as information on the number of days that can be neglected. Note that the value of the division result as the number of days that can be left is rounded up at a position below the decimal point and output to the display device 15 as an integer value. Alternatively, a predetermined extra number of days such as 2-3 days may be added to the integer value, and this may be output to the display device 15 as information on the number of days that can be left unattended.

表示装置15は、例えばカーナビゲーション装置の地図表示等を行うためのドットマトリクス方式の液晶表示タッチパネル等が兼用され、所定のメニュー画面でユーザーがタッチ操作等を行った際に、図7に示した「バッテリー情報」の画面31に表示切換し、放置可能期間演算処理部17から与えられた放置可能日数の情報を所定の表示欄33に表示するとともに、バッテリ状態検知部13から与えられた電池残量の値及び劣化度の値を、例えば横長の点線状のゲージ35,37に表示する。尚、図7中の符号39は電力の回生により鉛バッテリ11に充電が行われた結果として図られた省燃費効果の数値を表示する表示欄を示している。  The display device 15 is also used, for example, as a dot matrix type liquid crystal display touch panel for displaying a map of a car navigation device, and the like as shown in FIG. 7 when a user performs a touch operation or the like on a predetermined menu screen. The display is switched to the “battery information”screen 31, and information on the number of days that can be left unattended given from the leaveable periodcalculation processing unit 17 is displayed in apredetermined display field 33 and the remaining battery power given from the batterystate detection unit 13. The value of the quantity and the value of the degree of deterioration are displayed on, for example, horizontally long dottedlines 35 and 37.Reference numeral 39 in FIG. 7 denotes a display field for displaying a numerical value of the fuel saving effect obtained as a result of charging thelead battery 11 by regeneration of electric power.

以上のように構成された車両電源管理装置は、自動車の走行中や停車中等に、電池状態検知処理部25によって、鉛バッテリ11の充放電の電流値と、その充放電の前後の鉛バッテリ11の端子電圧の変化量とに基づいて、鉛バッテリ11の電池残量または劣化度を検知する。そして、電池状態検知処理部25は、検知された電池残量の値を例えば百分率の数値として放置可能期間演算処理部17及び表示装置15に出力するとともに、鉛バッテリ11の劣化度の値を例えば百分率の数値として表示装置15に出力する。  The vehicle power supply management apparatus configured as described above is configured to charge and discharge thelead battery 11 and thelead battery 11 before and after the charge and discharge by the battery state detection processing unit 25 while the automobile is running or stopped. The remaining battery level or the degree of deterioration of thelead battery 11 is detected based on the amount of change in the terminal voltage. Then, the battery state detection processing unit 25 outputs the detected value of the remaining battery level as a percentage value, for example, to the neglectable periodcalculation processing unit 17 and the display device 15, and sets the deterioration level value of thelead battery 11, for example. It is output to the display device 15 as a percentage value.

このとき、放置可能期間演算処理部17は、予めROM(例えばフラッシュROM等)内に保有していた1日当たりの暗電流の量と、1日当たりの鉛バッテリ11の自己放電の量とに基づいて、鉛バッテリ11の1日当たりに減少する電池残量を演算し、バッテリ状態検知部13で演算された電池残量を、鉛バッテリ11の1日当たりに減少する電池残量で除算して、放置可能期間(放置可能日数)の値を求めた後、この値を表示装置15に出力する。  At this time, the neglectable periodcalculation processing unit 17 is based on the amount of dark current per day previously stored in the ROM (for example, flash ROM) and the amount of self-discharge of thelead battery 11 per day. The battery remaining amount decreasing per day of thelead battery 11 is calculated, and the battery remaining amount calculated by the batterystate detection unit 13 is divided by the battery remaining amount decreasing per day of thelead battery 11 and can be left as it is. After obtaining the value of the period (number of days that can be left unattended), this value is output to the display device 15.

表示装置15においては、所定のメニュー画面でユーザーがタッチ操作等を行った場合に、図7に示した「バッテリー情報」の画面31に表示切換し、放置可能期間演算処理部17から与えられた放置可能日数の情報を所定の表示欄33に表示するとともに、バッテリ状態検知部13から与えられた電池残量の値及び劣化度の値を、例えば横長の点線状のゲージ35,37に表示する。  In the display device 15, when the user performs a touch operation or the like on a predetermined menu screen, the display is switched to the “battery information”screen 31 shown in FIG. Information on the number of days that can be left is displayed in apredetermined display field 33, and the value of the remaining battery level and the degree of deterioration given from the batterystate detection unit 13 are displayed on, for example, horizontally long dotted line gauges 35 and 37. .

このように、ユーザーは、図7に示した表示装置15の画面31内の所定の表示欄33に表示された放置可能日数の情報を視認するだけで、あとどのくらいの期間だけ自動車を放置してもよいかを容易に認識できる。したがって、長期放置による自動車のバッテリ切れを容易に防止することが可能となる。  In this way, the user can leave the car alone for just how long after leaving the information on the number of days allowed to be left displayed in thepredetermined display field 33 in thescreen 31 of the display device 15 shown in FIG. Can be easily recognized. Therefore, it is possible to easily prevent the vehicle from running out of battery due to being left for a long time.

また、放置可能日数の情報に加えて、電池残量と劣化度の情報を併せて表示装置15に表示するので、ユーザーは鉛バッテリ11の状態を多面的に認識することができ、例えば、放置可能日数が短い場合で、電池残量も少ないことを表示装置15で知った場合に、一部の車載電装品のスイッチをオフにするなどして消費電力を抑えて運転すれば、放置可能日数を増大させることができるかも知れない、といった有益な情報を得ることができる。あるいは、電池残量は多いが、鉛バッテリ11の劣化度が劣悪なために放置可能日数が短く表示されていることを認識した場合に、放置可能日数を増大させるためには鉛バッテリ11の交換が望ましいことを認識できる。したがって、ユーザーは、鉛バッテリ11の管理上、有益な情報を表示装置15から容易に得ることができる。  Further, in addition to the information on the number of days that can be left, information on the remaining battery level and the degree of deterioration is displayed on the display device 15, so that the user can recognize the state of thelead battery 11 in many ways. If the display device 15 knows that the remaining battery life is short when the possible number of days is short, the number of days that can be left is allowed if the vehicle is operated with reduced power consumption by switching off some of the on-vehicle electrical components. It is possible to obtain useful information such as that it may be possible to increase. Alternatively, in order to increase the number of days that can be left when it is recognized that the number of days that can be left is displayed short because the degree of deterioration of thelead battery 11 is poor although the remaining amount of the battery is large, thelead battery 11 is replaced. Can be recognized. Therefore, the user can easily obtain useful information from the display device 15 in managing thelead battery 11.

尚、上記実施の形態で説明した鉛バッテリ11の電池残量及び劣化度の検出方法は一例に過ぎず、上記実施の形態の方法に限られない。  In addition, the detection method of the battery remaining amount and deterioration degree of thelead battery 11 demonstrated in the said embodiment is only an example, and is not restricted to the method of the said embodiment.

また、図7に示した表示装置15の画面31も一例に過ぎず、さらに放置可能期間の表示も、放置可能日数ではなく、例えば放置可能時間等の他の形式で表示を行っても差し支えない。  Further, thescreen 31 of the display device 15 shown in FIG. 7 is merely an example, and the display of the neglectable period is not limited to the number of days that can be neglected, and may be displayed in another format such as the neglectable time. .

さらに、上記実施の形態では、電池の例として鉛バッテリ11を使用した例について説明したが、これ以外に、例えばアンチモンバッテリ、カルシウムバッテリまたはハイブリッドバッテリを適用しても差し支えない。  Furthermore, in the above-described embodiment, an example in which thelead battery 11 is used as an example of the battery has been described. However, for example, an antimony battery, a calcium battery, or a hybrid battery may be applied.

さらにまた、上記実施の形態では、放置可能期間等を報知する報知装置として表示装置15を適用した例について説明したが、例えばユーザーの操作にしたがって放置可能期間等の情報を音声で出力する音声出力装置であっても差し支えない。  Furthermore, in the above-described embodiment, the example in which the display device 15 is applied as a notification device that notifies a neglectable period or the like has been described. It can be a device.

本発明の一の実施の形態に係る車両電源管理装置を示すブロック図である。It is a block diagram which shows the vehicle power supply management apparatus which concerns on one embodiment of this invention.鉛バッテリの放電時における電流値及び端子電圧の時系列的な変化の例を示す図である。It is a figure which shows the example of the time-sequential change of the electric current value at the time of discharge of a lead battery, and a terminal voltage.鉛バッテリに対して種々の電流値で充放電が行われた際の端子電圧の変化状況を計測した結果を示すグラフである。It is a graph which shows the result of having measured the change state of the terminal voltage at the time of charging / discharging with various electric current values with respect to a lead battery.劣化度の異なる2種類の鉛バッテリについて充放電に伴う端子電圧の変化量を比較したグラフである。It is the graph which compared the variation | change_quantity of the terminal voltage accompanying charging / discharging about two types of lead batteries from which a deterioration degree differs.鉛バッテリに対して所定電流値の充放電が行われた際の開放端子電圧と導出した内部抵抗値との関係を示すグラフである。It is a graph which shows the relationship between the open terminal voltage at the time of charging / discharging of a predetermined electric current value with respect to a lead battery, and the derived | led-out internal resistance value.異なる開放端子電圧において鉛バッテリに所定電流値の充放電を行わせた際に取得した充電内部抵抗値と放電内部抵抗値との比の値を示すグラフである。It is a graph which shows the value of the ratio of the charge internal resistance value acquired when charging / discharging a lead battery with a predetermined electric current value in a different open terminal voltage, and a discharge internal resistance value.本発明の一の実施の形態に係る車両電源管理装置の表示装置に示されたバッテリー情報の画面を示す図である。It is a figure which shows the screen of the battery information shown on the display apparatus of the vehicle power management apparatus which concerns on one embodiment of this invention.一般的な自動車の電源系統を示すブロック図である。It is a block diagram which shows the power supply system of a common motor vehicle.

符号の説明Explanation of symbols

11 鉛バッテリ
13 バッテリ状態検知部
15 表示装置
17 放置可能期間演算処理部
21 電流検出部
23 電圧検出部
25 電池状態検知処理部
29 通電路
DESCRIPTION OFSYMBOLS 11Lead battery 13 Battery state detection part 15Display apparatus 17 Allowable period calculation process part 21Current detection part 23 Voltage detection part 25 Battery statedetection process part 29 Current path

Claims (3)

Translated fromJapanese
自動車に搭載される電池の少なくとも電池残量を検知するバッテリ状態検知部と、
前記バッテリ状態検知部で検知された電池残量に基づいて自動車の放置可能期間を演算する放置可能期間演算処理部と、
前記放置可能期間演算処理部で演算された前記放置可能期間を報知する報知装置と
を備える車両電源管理装置。
A battery state detector that detects at least the remaining battery level of a battery mounted on the vehicle;
A negligible period calculation processing unit that calculates the negligible period of the vehicle based on the remaining battery level detected by the battery state detection unit;
A vehicle power supply management device comprising: a notification device that notifies the neglectable period calculated by the neglectable period calculation processing unit.
請求項1に記載の車両電源管理装置であって、
前記報知装置が、前記電池残量を併せて報知することを特徴とする車両電源管理装置。
The vehicle power management device according to claim 1,
The vehicle power supply management device, wherein the notification device also notifies the remaining battery level.
請求項1または請求項2に記載の車両電源管理装置であって、
前記バッテリ状態検知部が、前記電池の劣化度を検知し、
前記報知装置が、前記劣化度を併せて報知することを特徴とする車両電源管理装置。
The vehicle power management device according to claim 1 or 2,
The battery state detection unit detects the degree of deterioration of the battery,
The vehicle power supply management device, wherein the notification device notifies the deterioration degree together.
JP2004328955A2004-11-122004-11-12 Vehicle power management devicePendingJP2006137316A (en)

Priority Applications (1)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2009051351A (en)*2007-08-272009-03-12Auto Network Gijutsu Kenkyusho:Kk Vehicle power supply
JP2010254000A (en)*2009-04-222010-11-11Panasonic Corp Storage battery status display device for engine start
JP2011158267A (en)*2010-01-292011-08-18Hitachi LtdSecondary battery system
CN107757527A (en)*2017-09-192018-03-06华晨汽车集团控股有限公司A kind of automobile using digital display battery and control method
JP2020065424A (en)*2018-10-192020-04-23トヨタ自動車株式会社Display device and vehicle comprising the same
JP2020065422A (en)*2018-10-192020-04-23トヨタ自動車株式会社 Display device and vehicle including the same
WO2021206016A1 (en)*2020-04-072021-10-14横浜ゴム株式会社Pneumatic tire

Cited By (9)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2009051351A (en)*2007-08-272009-03-12Auto Network Gijutsu Kenkyusho:Kk Vehicle power supply
JP2010254000A (en)*2009-04-222010-11-11Panasonic Corp Storage battery status display device for engine start
JP2011158267A (en)*2010-01-292011-08-18Hitachi LtdSecondary battery system
CN107757527A (en)*2017-09-192018-03-06华晨汽车集团控股有限公司A kind of automobile using digital display battery and control method
JP2020065424A (en)*2018-10-192020-04-23トヨタ自動車株式会社Display device and vehicle comprising the same
JP2020065422A (en)*2018-10-192020-04-23トヨタ自動車株式会社 Display device and vehicle including the same
CN111071098A (en)*2018-10-192020-04-28丰田自动车株式会社Display device and vehicle provided with same
JP7131290B2 (en)2018-10-192022-09-06トヨタ自動車株式会社 DISPLAY DEVICE AND VEHICLE INCLUDING THE SAME
WO2021206016A1 (en)*2020-04-072021-10-14横浜ゴム株式会社Pneumatic tire

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