JP2000298160A - Battery residual capacity detecting device - Google Patents
Battery residual capacity detecting deviceInfo
- Publication number
- JP2000298160A JP2000298160A JP11108272A JP10827299A JP2000298160A JP 2000298160 A JP2000298160 A JP 2000298160A JP 11108272 A JP11108272 A JP 11108272A JP 10827299 A JP10827299 A JP 10827299A JP 2000298160 A JP2000298160 A JP 2000298160A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- voltage
- detecting
- internal resistance
- correction
- 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
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- Measurement Of Current Or Voltage (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池の残存容量を
検出して表示あるいは報知する電池の残存容量検出装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the remaining capacity of a battery and displaying or notifying the remaining capacity of the battery.
【０００２】[0002]
【従来の技術】従来、電池の残存容量検出装置として
は、電池の端子間電圧を検出する電圧検出手段を備え、
これにより検出された値を表示するものがある。一般
に、電池を用いて電力を供給するモータ等に大きな負荷
がかかるとそれに伴い駆動電流が大きくなり、それに伴
い端子間電圧が低下することになる。すると上述した電
池の残存容量検出装置にあっては、出力される値が小さ
くなることになり、利用者は電池の残存容量が低下した
ものと誤った判断をすることになる。2. Description of the Related Art Conventionally, a device for detecting a remaining capacity of a battery includes voltage detecting means for detecting a voltage between terminals of the battery.
Some display the value detected thereby. In general, when a large load is applied to a motor or the like that supplies electric power using a battery, the driving current increases accordingly, and the voltage between terminals decreases accordingly. Then, in the battery remaining capacity detection device described above, the output value becomes small, and the user erroneously determines that the battery remaining capacity has decreased.
【０００３】そこで、電池の残存容量を正しく利用者に
報知することが可能になる電池の残存容量検出装置が特
開平５−３３３０６４号公報等に提案されている。この
ものにあっては、駆動電流の大きさに応じて端子間電圧
値を補正するようになっている。[0003] In view of the above, a battery remaining capacity detecting device capable of correctly informing a user of the remaining battery capacity has been proposed in Japanese Patent Application Laid-Open No. Hei 5-333064. In this case, the inter-terminal voltage value is corrected according to the magnitude of the drive current.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上述のよう
な構成の電池の残存容量検出装置にあっては、駆動電流
に応じて変化する電池内部抵抗による電圧降下や駆動電
流と比例関係にある配線抵抗による電圧降下が考慮され
ておらず必ずしも正確な電池の残存容量表示することが
できないという問題点を有していた。However, in the battery remaining capacity detecting device having the above-described configuration, the voltage drop due to the internal resistance of the battery, which varies according to the drive current, and the wiring which is proportional to the drive current. There has been a problem that the voltage drop due to the resistance is not taken into account and it is not always possible to accurately display the remaining capacity of the battery.
【０００５】本発明は、上記の問題点に鑑みて成された
ものであり、その目的とするところは、正確に電池の残
存容量を検出することが可能になる電池の残存容量検出
装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a battery remaining capacity detecting device capable of accurately detecting the remaining battery capacity. Is to do.
【０００６】[0006]
【課題を解決するための手段】請求項１記載の発明は、
電池の端子間電圧を検出する電圧検出手段と、電池から
電力供給される負荷の駆動電流を検出する電流検出手段
と、電池と負荷との間の配線抵抗及び電池の内部抵抗の
加算値に駆動電流を乗算して補正電圧を求め、端子間電
圧に補正電圧を加えて出力する電圧補正手段とを備える
ようにしたことを特徴とするものである。According to the first aspect of the present invention,
Voltage detecting means for detecting a voltage between terminals of a battery, current detecting means for detecting a driving current of a load supplied with power from the battery, and driving to an added value of a wiring resistance between the battery and the load and an internal resistance of the battery. And a voltage correcting means for obtaining a correction voltage by multiplying the current, adding the correction voltage to the voltage between terminals, and outputting the corrected voltage.
【０００７】請求項２記載の発明は、請求項１記載の電
池の残存容量検出装置において、電圧補正手段は、電池
の内部抵抗を駆動電流に応じて補正するようにしたこと
を特徴とするものである。According to a second aspect of the present invention, in the battery remaining capacity detecting device according to the first aspect, the voltage correcting means corrects the internal resistance of the battery according to the drive current. It is.
【０００８】請求項３記載の発明は、請求項２記載の電
池の残存容量検出装置において、電圧補正手段は、電池
の内部抵抗を駆動電流が大きい時には小さくするように
したことを特徴とするものである。According to a third aspect of the present invention, in the battery remaining capacity detecting device according to the second aspect, the voltage correction means reduces the internal resistance of the battery when the driving current is large. It is.
【０００９】請求項４記載の発明は、請求項１乃至請求
項３記載の電池の残存容量検出装置において、電池と電
圧検出手段との間の配線抵抗の値を設定する配線抵抗設
定手段を付加したことを特徴とするものである。According to a fourth aspect of the present invention, in the battery remaining capacity detecting device of the first to third aspects, a wiring resistance setting means for setting a value of a wiring resistance between the battery and the voltage detecting means is added. It is characterized by having done.
【００１０】請求項５記載の発明は、請求項１乃至請求
項４記載の電池の残存容量検出装置において、電池の内
部抵抗の値を設定する電池内部抵抗設定手段を付加した
ことを特徴とするものである。According to a fifth aspect of the present invention, in the battery remaining capacity detecting device according to the first to fourth aspects, a battery internal resistance setting means for setting a value of the internal resistance of the battery is added. Things.
【００１１】[0011]
【発明の実施の形態】以下、本発明の一実施の形態に係
る電池の残存容量検出装置について図１乃至図４に基づ
き詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus for detecting a remaining capacity of a battery according to an embodiment of the present invention will be described in detail with reference to FIGS.
【００１２】本実施の形態に係る電池の残存容量検出装
置の概略構成図を図１に示す。本実施の形態に係る電池
２の残存容量検出装置は、電圧検出手段１ａと、電流検
出手段１ｂと、電圧補正手段１ｃとから構成され、電流
検出手段１ｂの出力値の大きさに応じて電圧検出手段１
ａから出力される電圧値を補正するようになっている。FIG. 1 shows a schematic configuration diagram of a device for detecting the remaining capacity of a battery according to the present embodiment. The device for detecting the remaining capacity of battery 2 according to the present embodiment includes voltage detecting means 1a, current detecting means 1b, and voltage correcting means 1c, and the voltage is determined according to the magnitude of the output value of current detecting means 1b. Detection means 1
The voltage value output from a is corrected.
【００１３】電池２は残存容量と比例関係にある開路電
圧Vbatと電池の内部抵抗Rbatとによりモデル化される。
配線抵抗Rwは電池２と負荷Ｌとの間の抵抗値であり、電
圧検出器３ａは電池２が出力する負荷Ｌの端子間電圧を
電圧検出手段１ａに出力し、電流検出器３ｂは電池２が
放電する駆動電流を電流検出手段１ｂに出力する。The battery 2 is modeled by an open circuit voltage Vbat proportional to the remaining capacity and an internal resistance Rbat of the battery.
The wiring resistance Rw is a resistance value between the battery 2 and the load L, the voltage detector 3a outputs a voltage between terminals of the load L output by the battery 2 to the voltage detecting means 1a, and the current detector 3b is And outputs a driving current to be discharged to the current detecting means 1b.
【００１４】電池２の端子間電圧を検出する電圧検出手
段１ａ及び電池２から供給される負荷Ｌの駆動電流を検
出する電流検出手段１ｂは、端子間電圧及び駆動電流を
演算処理可能な信号値(Vs、Is)に増幅／変換する。電圧
補正手段１ｃは、検出された端子間電圧Vsと駆動電流Is
とから開路電圧演算値Vsignを算出する。The voltage detecting means 1a for detecting the voltage between the terminals of the battery 2 and the current detecting means 1b for detecting the driving current of the load L supplied from the battery 2 comprise signal values capable of calculating the terminal voltage and the driving current. Amplify / convert to (Vs, Is). The voltage correcting means 1c calculates the detected terminal voltage Vs and the drive current Is.
From this, the open circuit voltage calculation value Vsign is calculated.
【００１５】表示手段４は、電圧補正手段１ｃからの信
号を受けて、開路電圧演算値Vsignに応じた電池の残存
容量を表示するようになっている。The display means 4 receives a signal from the voltage correction means 1c and displays the remaining capacity of the battery according to the open circuit voltage calculation value Vsign.
【００１６】電圧補正手段１ｃは、図２に示すように、
電池内部抵抗設定手段１ｃａと、補正電圧演算手段１ｃ
ｂとを備えてなる。電池内部抵抗設定手段１ｃａは、駆
動電流Isと電池内部抵抗設定値Rbatとの関係を設定／保
持しているものであり、駆動電流Isに応じた電池内部抵
抗設定値Rbatを補正電圧演算手段１ｃｂに指令するよう
になっている。As shown in FIG. 2, the voltage correction means 1c
Battery internal resistance setting means 1ca and correction voltage calculating means 1c
b. The battery internal resistance setting means 1ca sets / holds the relationship between the drive current Is and the battery internal resistance set value Rbat, and calculates the battery internal resistance set value Rbat corresponding to the drive current Is as the correction voltage calculation means 1cb. Command.
【００１７】なお、電池内部抵抗の値や配線抵抗の値は
使用する電池２や配線の特性により変化するものである
ことから、これらの値を利用者が電池内部抵抗設定手段
１ｃａや配線抵抗設定手段（図示せず）を用いて任意に
設定することができるようになっている。これにより、
電池２や配線の特性に基づいて細やかに補正電圧を算出
することが可能になっている。Since the value of the battery internal resistance and the value of the wiring resistance vary depending on the characteristics of the battery 2 and the wiring used, the user sets these values by the battery internal resistance setting means 1ca and the wiring resistance setting. It can be set arbitrarily using means (not shown). This allows
It is possible to finely calculate the correction voltage based on the characteristics of the battery 2 and the wiring.
【００１８】[0018]
【数１】 (Equation 1)
【００１９】本実施の形態にあっては駆動電流と電池内
部抵抗設定値との関係は、図３に示すように、駆動電流
Isが切換電流I1まで一定値で、切換電流I1以降は駆動電
流Isに応じて減少させた電池内部抵抗設定値Rbatを設定
／記憶している。補正電圧演算手段１ｃｂは、電池電圧
Vsと、駆動電流Isと、電池内部抵抗設定値RbatとからIn this embodiment, the relationship between the drive current and the set value of the battery internal resistance is as shown in FIG.
Is is a constant value up to the switching current I1, and after the switching current I1, the battery internal resistance set value Rbat reduced according to the drive current Is is set / stored. The correction voltage calculation means 1cb calculates the battery voltage
From Vs, drive current Is, and battery internal resistance set value Rbat
【数１】に基づいて補正電圧Vaddを演算する。The correction voltage Vadd is calculated based on the equation (1).
【００２０】なお、In addition,
【数１】において、Vadd_wは配線抵抗による補正電圧を
示し、Vadd_bは電池内部抵抗による補正電圧を示してい
る。In Equation 1, Vadd_w indicates a correction voltage based on the wiring resistance, and Vadd_b indicates a correction voltage based on the internal resistance of the battery.
【００２１】本実施の形態にあっては、加算手段により
電池の端子間電圧Vsに補正電圧Vaddを加算することによ
り開路電圧演算値Vsignを算出する。図４に駆動電流Is
と開路電圧演算値Vsignとの関係を示す。配線抵抗によ
る補正電圧Vadd_wは、駆動電流Isに応じて比例的に増加
する。電池内部抵抗による補正電圧Vadd_bは切換電流I1
まで駆動電流Isに比例して大きくなるが、切換電流I1以
降は電池内部抵抗値Rbatが小さくなるため駆動電流Isに
比例して増加しない。In the present embodiment, the open circuit voltage calculation value Vsign is calculated by adding the correction voltage Vadd to the battery terminal voltage Vs by the adding means. FIG. 4 shows the driving current Is.
And the open circuit voltage calculation value Vsign. The correction voltage Vadd_w due to the wiring resistance increases in proportion to the drive current Is. The correction voltage Vadd_b due to the battery internal resistance is the switching current I1
Until the switching current I1, the internal resistance value Rbat of the battery decreases, and does not increase in proportion to the driving current Is.
【００２２】本実施の形態に係る電池の残存容量検出装
置にあっては、電流検出手段１ｂの出力信号が大きくな
れば電圧検出手段１ａから出力される電圧値が大きくな
るように補正していたものに加え、駆動電流に比例して
増加する配線抵抗による電圧補正と電池固有の特性で決
まる電池の内部抵抗による電圧補正を加味して補正電圧
を求めることができるため、正確に電池の残存容量を検
出することが可能になるのである。In the device for detecting the remaining capacity of a battery according to the present embodiment, the correction is made so that the voltage value output from the voltage detecting means 1a increases as the output signal of the current detecting means 1b increases. In addition to the above, the correction voltage can be obtained by taking into account the voltage correction due to the wiring resistance that increases in proportion to the drive current and the voltage correction due to the internal resistance of the battery, which is determined by the characteristics unique to the battery. Can be detected.
【００２３】[0023]
【発明の効果】以上のように、請求項１記載の発明にあ
っては、電池の端子間電圧を検出する電圧検出手段と、
電池から電力供給される負荷の駆動電流を検出する電流
検出手段と、電池と負荷との間の配線抵抗及び電池の内
部抵抗の加算値に駆動電流を乗算して補正電圧を求め、
端子間電圧に補正電圧を加えて出力する電圧補正手段と
を備えるようにしたので、駆動電流に比例して増加する
配線抵抗による電圧補正と電池固有の特性で決まる電池
の内部抵抗による電圧補正を加味して補正電圧を求める
ことができるため、正確に電池の残存容量を検出するこ
とが可能になる電池の残存容量検出装置を提供すること
が可能になるという効果を奏する。As described above, according to the first aspect of the present invention, voltage detecting means for detecting a voltage between terminals of a battery,
Current detection means for detecting a drive current of a load supplied with power from a battery, and a correction voltage obtained by multiplying an added value of a wiring resistance between the battery and the load and an internal resistance of the battery by the drive current,
Voltage correction means for adding a correction voltage to the inter-terminal voltage and outputting the same, so that voltage correction by the wiring resistance that increases in proportion to the drive current and voltage correction by the internal resistance of the battery determined by the characteristics specific to the battery. Since the correction voltage can be obtained in consideration of this, it is possible to provide a battery remaining capacity detection device that can accurately detect the remaining capacity of the battery.
【００２４】請求項２記載の発明にあっては、請求項１
記載の電池の残存容量検出装置において、電圧補正手段
は、電池の内部抵抗を駆動電流に応じて補正するように
したので、駆動電流で放電容量が変化する電池において
も残存容量を正確に算出することが可能になるという効
果を奏する。According to the second aspect of the present invention, the first aspect is provided.
In the battery remaining capacity detection device described above, the voltage correction means corrects the internal resistance of the battery according to the drive current, so that the remaining capacity can be accurately calculated even in a battery whose discharge capacity varies with the drive current. This has the effect that it becomes possible.
【００２５】請求項３記載の発明にあっては、請求項２
記載の電池の残存容量検出装置において、電圧補正手段
は、電池の内部抵抗を駆動電流が大きい時には小さくす
るようにしたので、鉛電池のように駆動電流が大きい場
合には放電容量が減少する電池においても残存容量を正
確に算出することが可能になるという効果を奏する。According to the third aspect of the present invention, the second aspect is provided.
In the battery remaining capacity detection device described above, the voltage correction means reduces the internal resistance of the battery when the driving current is large, so that the battery whose discharge capacity decreases when the driving current is large, such as a lead battery, This also has an effect that the remaining capacity can be accurately calculated.
【００２６】請求項４記載の発明にあっては、請求項１
乃至請求項３記載の電池の残存容量検出装置において、
電池と電圧検出手段との間の配線抵抗の値を設定する配
線抵抗設定手段を付加したので、配線の特性に合わせて
配線抵抗を細やかに設定することができるため、より精
度良く補正電圧を算出することが可能になるという効果
を奏する。According to the invention described in claim 4, claim 1 is
4. The battery remaining capacity detecting device according to claim 3,
A wiring resistance setting means for setting the value of the wiring resistance between the battery and the voltage detecting means has been added, so that the wiring resistance can be finely set according to the characteristics of the wiring, so that the correction voltage can be calculated more accurately. This has the effect that it becomes possible to
【００２７】請求項５記載の発明にあっては、請求項１
乃至請求項４記載の電池の残存容量検出装置において、
電池の内部抵抗の値を設定する電池内部抵抗設定手段を
付加したので、電池の特性に合わせて電池内部抵抗を細
やかに設定することができるため、より精度良く補正電
圧を算出することが可能になるという効果を奏する。According to the fifth aspect of the present invention, there is provided the first aspect.
5. The device for detecting the remaining capacity of a battery according to claim 4,
A battery internal resistance setting means for setting the value of the internal resistance of the battery has been added, so that the internal resistance of the battery can be finely set according to the characteristics of the battery, so that the correction voltage can be calculated more accurately. It has the effect of becoming.
【図１】電池の残存容量検出装置の概略構成図である。FIG. 1 is a schematic configuration diagram of a battery remaining capacity detection device.
【図２】電圧補正手段の概略構成図である。FIG. 2 is a schematic configuration diagram of a voltage correction unit.
【図３】駆動電流と電池内部抵抗設定値との関係を示す
グラフである。FIG. 3 is a graph showing a relationship between a drive current and a set value of a battery internal resistance.
【図４】駆動電流と電圧との関係を示すグラフである。FIG. 4 is a graph showing a relationship between a drive current and a voltage.
１ａ 電圧検出手段 １ｂ 電流検出手段 １ｃ 電圧補正手段 １ｃａ 電池内部抵抗設定手段 １ｃｂ 補正電圧演算手段 ２ 電池 ３ａ 電圧検出器 ３ｂ 電流検出器 ４ 表示手段 1a Voltage detection means 1b Current detection means 1c Voltage correction means 1ca Battery internal resistance setting means 1cb Correction voltage calculation means 2 Battery 3a Voltage detector 3b Current detector 4 Display means
フロントページの続き (72)発明者 阪本 健二 大阪府門真市大字門真1048番地松下電工株 式会社内 Ｆターム(参考） 2G016 CA00 CB06 CB11 CB12 CB13 CB21 CC06 CC27 CE00 2G035 AA04 AA21 AB03 AC01 AC02 AC19 AD19 AD28 AD54 Continuing from the front page (72) Inventor Kenji Sakamoto 1048 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Works Co., Ltd.
Claims (5)
段と、電池から電力供給される負荷の駆動電流を検出す
る電流検出手段と、電池と負荷との間の配線抵抗及び電
池の内部抵抗の加算値に駆動電流を乗算して補正電圧を
求め、端子間電圧に補正電圧を加えて出力する電圧補正
手段とを備えるようにしたことを特徴とする電池の残存
容量検出装置。1. A voltage detecting means for detecting a voltage between terminals of a battery, a current detecting means for detecting a driving current of a load supplied with power from the battery, a wiring resistance between the battery and the load, and an internal resistance of the battery. A voltage correction means for obtaining a correction voltage by multiplying the sum of the above by a drive current to obtain a correction voltage, adding the correction voltage to the inter-terminal voltage, and outputting the corrected voltage.
電流に応じて補正するようにしたことを特徴とする請求
項１記載の電池の残存容量検出装置。2. The battery remaining capacity detecting device according to claim 1, wherein the voltage correcting means corrects the internal resistance of the battery according to the drive current.
電流が大きい時には小さくするようにしたことを特徴と
する請求項２記載の電池の残存容量検出装置。3. The battery remaining capacity detecting device according to claim 2, wherein the voltage correction means reduces the internal resistance of the battery when the driving current is large.
値を設定する配線抵抗設定手段を付加したことを特徴と
する請求項１乃至請求項３記載の電池の残存容量検出装
置。4. The apparatus according to claim 1, further comprising wiring resistance setting means for setting a value of wiring resistance between the battery and the voltage detecting means.
抵抗設定手段を付加したことを特徴とする請求項１乃至
請求項４記載の電池の残存容量検出装置。5. The battery remaining capacity detecting device according to claim 1, further comprising a battery internal resistance setting means for setting a value of the internal resistance of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10827299A JP3473488B2 (en) | 1999-04-15 | 1999-04-15 | Battery remaining capacity detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10827299A JP3473488B2 (en) | 1999-04-15 | 1999-04-15 | Battery remaining capacity detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000298160A true JP2000298160A (en) | 2000-10-24 |
| JP3473488B2 JP3473488B2 (en) | 2003-12-02 |
Family
ID=14480452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10827299A Expired - Lifetime JP3473488B2 (en) | 1999-04-15 | 1999-04-15 | Battery remaining capacity detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3473488B2 (en) |
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