JPS62237370A - Detector for residual quantity of electricity in battery - Google Patents

Detector for residual quantity of electricity in battery

Info

Publication number
JPS62237370A
JPS62237370A JP61079854A JP7985486A JPS62237370A JP S62237370 A JPS62237370 A JP S62237370A JP 61079854 A JP61079854 A JP 61079854A JP 7985486 A JP7985486 A JP 7985486A JP S62237370 A JPS62237370 A JP S62237370A
Authority
JP
Japan
Prior art keywords
battery
electricity
voltage
amplifier
output
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.)
Pending
Application number
JP61079854A
Other languages
Japanese (ja)
Inventor
Fumio Muto
文雄 武藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP61079854A priority Critical patent/JPS62237370A/en
Publication of JPS62237370A publication Critical patent/JPS62237370A/en
Pending legal-status Critical Current

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  • Tests Of Electric Status Of Batteries (AREA)

Abstract

PURPOSE:To exactly detect the residual quantity of electricity of a battery even if the charging condition thereof is in any state by measuring the terminal voltage in the operation starting stage of the battery and converting the same to a signal indicting the residual quantity of electricity. CONSTITUTION:The terminal voltage of the battery 1 is inputted to an amplifier 3 of a fixed gain and the output thereof is applied via comparators 5-1-5-m and resistor 7 to an amplifier 9 of variable gains. There is a 1-to-1 corresponding relation between the terminal voltage and residual quantity of electricity of the battery 1 when prescribed discharge current is passed thereto. The residual quantity of electricity is known if the terminal voltage is detected. A reference voltage V0 is, thereupon, applied to a terminal 11, then the voltages divided down by the resistors 13-1-13-(m+1) are inputted to the comparators 5-1-5-m, by which the output voltage of the amplifier 3 and the voltage divided down from the reference voltage V0 are compared. The output '1' is obtd. when the output voltage of the amplifier 3 is larger and the output '0' is obtd. when said voltage is smaller. The gain of the amplifier 9 is then changed by analog switches 17-1-17-m, by which the output indicating the residual quantity of electricity is obtd.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はバッテリの残存電気量検出装置に関するもので
ある。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting the amount of remaining electricity in a battery.

〔従来の技術〕[Conventional technology]

従来バッテリを電源とする無人搬送車やロボット等にお
いてはバッテリの充電要求や残存電気量を検知すること
が必要であり、充放電電流を積算することによって残存
電気量の検出を行う方法等が存した。
Conventionally, in automatic guided vehicles, robots, etc. that use batteries as a power source, it is necessary to detect battery charging requests and the amount of remaining electricity, and there are methods to detect the amount of remaining electricity by integrating charging and discharging currents. did.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながらこの充放電電流を積算する方法においては
正確な残存電気量の検出が行われるもののその検出に際
してはバッテリの初期状態が完全充電状態あるいは完全
放電状態であることが必要であり充電状態が中途な場合
には残存電気量を検出することができないという問題点
かあった。
However, although this method of integrating charging and discharging currents accurately detects the amount of remaining electricity, the initial state of the battery must be fully charged or completely discharged, and the charging state may be in the middle of the charging state. In some cases, there was a problem that the amount of remaining electricity could not be detected.

本発明は前記問題点に鑑みてなされたものでその目的と
するところはバッテリの充電状態が完全であるか中途で
あるかということにかかわらず充電状態がどのような状
態でもバッテリの残存電気量を正確に検出することので
きるバッテリの残存電気;検出装置を提供することにあ
る。
The present invention has been made in view of the above problems, and its purpose is to reduce the amount of remaining electricity in the battery regardless of whether the battery is fully charged or partially charged. An object of the present invention is to provide a detection device that can accurately detect residual electricity in a battery.

〔問題点を解決するための手段〕[Means for solving problems]

前記目的を達成するために本発明は所定の放電電流を流
したときのバッテリの端子電圧を検出する手段と、該検
出する手段によって検出された端子電圧をバッテリの残
存電気量に対応する信号に変換する手段とを具えたこと
を特徴とする。
In order to achieve the above object, the present invention includes means for detecting the terminal voltage of the battery when a predetermined discharge current is passed through it, and converting the terminal voltage detected by the detecting means into a signal corresponding to the remaining amount of electricity in the battery. It is characterized by comprising a means for converting.

〔作用〕[Effect]

所定の放電電流を流したときのバッテリの端子電圧とバ
ッテリの残存電気量との間には所定の関係があるのでバ
ッテリの動作開始時の端子電圧を測定しこれを残存電気
量を示す信号に変換する。
Since there is a predetermined relationship between the terminal voltage of the battery when a predetermined discharge current flows and the amount of remaining electricity in the battery, the terminal voltage at the start of battery operation is measured and this is used as a signal indicating the amount of remaining electricity. Convert.

〔実施例〕〔Example〕

以下図面に基づいて本発明の実施例を詳細に説明する。 Embodiments of the present invention will be described in detail below based on the drawings.

第1図は本発明の一実施例に係るバッテリの残存電気量
検出装置の回路図である。バッテリ1は図示しない負荷
に電力を供給するものでありその端子電圧か固定ゲイン
のアンプ3に入力される。
FIG. 1 is a circuit diagram of a battery remaining electricity quantity detection device according to an embodiment of the present invention. A battery 1 supplies power to a load (not shown), and its terminal voltage is input to an amplifier 3 with a fixed gain.

アンプ3の出力はコンパレータ5−1.5−2゜・・・
、5−mおよび抵抗値ROの抵抗7を介して可変ゲイン
のアンプ9に加えられる。端子11に加えられる基準電
圧Voは抵抗13−1.13−2゜・・・、13−(m
+1)によって分圧され分圧された電圧かコンパレータ
5−1.5−2. ・・・、5−mに入力される。コン
パレータ5−1.5−2゜・・・、5−mはアンプ3の
出力電圧と、基準電圧VOを夫々分圧した電圧とを比較
しアンプ3の出力電圧の方が大きいときには各コンパレ
ータ5−1、・・・、5−mの出力を“1”とするもの
である。
The output of amplifier 3 is output from comparator 5-1.5-2°...
, 5-m and a resistor 7 with a resistance value RO to a variable gain amplifier 9. The reference voltage Vo applied to the terminal 11 is applied to the resistor 13-1.13-2°..., 13-(m
+1) and the voltage divided by the comparators 5-1, 5-2. ..., is input to 5-m. Comparators 5-1.5-2°..., 5-m compare the output voltage of amplifier 3 and the voltage obtained by dividing the reference voltage VO, and when the output voltage of amplifier 3 is larger, each comparator 5 The outputs of -1, . . . , 5-m are set to "1".

各コンパレータ5−1.・・・、5−mの出力はインバ
ータ15−1. ・・・、15−mを介してアナログス
イッチ17−1.・・・、17−mの制御用電圧となる
。アンプ9に対して帰還用の抵抗19−1゜・・・、1
9−mが並列に接続されこの帰還用の抵抗19−1.・
・・、19−mに対して直列に前記アナログスイッチ1
7−1.・・・、17−mが設けられる。各アナログス
イッチ17−1.・・・、17−mは夫々インバータ1
5−1.・・・、15−mの出力が“O”のとき開いて
おり“1″のときには閉じている。
Each comparator 5-1. ..., 5-m is output from inverter 15-1. ..., 15-m to the analog switch 17-1. . . . becomes the control voltage of 17-m. Feedback resistor 19-1°..., 1 for amplifier 9
9-m are connected in parallel and this feedback resistor 19-1.・
..., the analog switch 1 in series with 19-m
7-1. ..., 17-m are provided. Each analog switch 17-1. ..., 17-m are inverter 1, respectively.
5-1. ..., 15-m is open when the output is "O" and closed when the output is "1".

アナログスイッチ17−1.・・・、17−mがスベて
閉じているときにはアンプ9のゲインGは抵抗19−1
.−、 19−mの抵抗値を夫々R1゜、・・、Rmと
すると次式で与えられる。
Analog switch 17-1. ..., when 17-m is smoothly closed, the gain G of amplifier 9 is equal to the resistance 19-1.
.. -, 19-m, respectively, are given by the following equation.

G−士 但し 土−上+土+・・・十土 RR+   R2R111 又アナログスイッチ17−1だけが閉じたときのアンプ
9のゲインGは となる。
G-Shibutashi-Kami+Sat+...Judo RR+R2R111 Also, when only the analog switch 17-1 is closed, the gain G of the amplifier 9 is as follows.

第2図は所定の放電電流を流したときのこのバッテリ1
の端子電圧と残存電気量の関係を示したものでありこの
関係はあらかじめ実験等により得られたものである。同
図から判るように端子電圧と残存電気量は1対1に対応
しており端子電圧を検出すれば残存電気量を知ることが
できる。
Figure 2 shows this battery 1 when a predetermined discharge current is applied.
This shows the relationship between the terminal voltage and the amount of remaining electricity, and this relationship was obtained in advance through experiments and the like. As can be seen from the figure, there is a one-to-one correspondence between the terminal voltage and the remaining amount of electricity, and the remaining amount of electricity can be determined by detecting the terminal voltage.

本実施例ではバッテリ1の端子電圧をアンプ3に入力し
抵抗13−1.・・・、13−(m+1)の抵抗値およ
び抵抗19−1.・・・、19−mの抵抗値を適宜設定
することによりアンプ9の出力電圧が第2図に示す残存
電気量に対応したものになるよう−にしたものである。
In this embodiment, the terminal voltage of the battery 1 is input to the amplifier 3, and the resistor 13-1. ..., the resistance value of 13-(m+1) and the resistance 19-1. By appropriately setting the resistance value of . . . 19-m, the output voltage of the amplifier 9 corresponds to the amount of remaining electricity shown in FIG.

次に本実施例の動作について説明する。Next, the operation of this embodiment will be explained.

バッテリ1の端子電圧が小さいときには例えばコンパレ
ータ5−mの出力だけが“1”となり他のコンパレータ
5−1.・・・、5−(m+1)の出力は“θ″となる
。従ってアナログスイッチ17−mだけが開き他のアナ
ログスイッチ17−1゜・・・;17−(m−1)は閉
じているのでアンプ9のゲインGは 但し となる。
When the terminal voltage of the battery 1 is small, for example, only the output of the comparator 5-m becomes "1" and the output of the other comparators 5-1. ..., the output of 5-(m+1) is "θ". Therefore, only the analog switch 17-m is open and the other analog switches 17-1°...; 17-(m-1) are closed, so the gain G of the amplifier 9 is as follows.

端子電圧か徐々に大きくなるとコンパレータ5−(m−
1)、・・・の出力が順次“1”となりインバータ15
−(m−1)、  ・・・を介してアナログスイッチ1
7−(m、−1)、・・・が開く。従ってアンプ9のゲ
インGは徐々に大きくなる。
As the terminal voltage gradually increases, comparator 5-(m-
1), ... outputs become "1" one after another and the inverter 15
- (m-1), ... via analog switch 1
7-(m, -1), . . . opens. Therefore, the gain G of the amplifier 9 gradually increases.

そして端子電圧とアンプ9の出力電圧の関係か第2図に
示すような関係になるように抵抗13−1.・・・、1
3−(m+1)および抵抗19−1゜・・・、19−m
の抵抗値を設定する。
Then, the resistor 13-1 is connected so that the relationship between the terminal voltage and the output voltage of the amplifier 9 is as shown in FIG. ..., 1
3-(m+1) and resistance 19-1°..., 19-m
Set the resistance value.

しかしてバッテリの充電状態が中途な状態であってもバ
ッテリの端子電圧を本回路に入力すればバッテリの残存
電気量を表わす出力電圧が得られる。そしてこの出力電
圧をパーセント表示やAH小単位表示することにより容
易にバッテリの残存電気量を検出することができる。
Even if the battery is in an intermediate state of charge, if the terminal voltage of the battery is input to this circuit, an output voltage representing the remaining amount of electricity in the battery can be obtained. By displaying this output voltage as a percentage or in small AH units, the amount of remaining electricity in the battery can be easily detected.

第3図はこの残存電気量検出装置を採用してバッテリの
充電要求信号発生回路を構成したときの構成回路図であ
る。
FIG. 3 is a circuit diagram of a battery charging request signal generating circuit employing this residual quantity of electricity detecting device.

バッテリ1には、負荷21及びシャント抵抗23が直列
に接続される。負荷21の出力電圧はアンプ25、電圧
周波数変換器(V/F)27を介してプリセッタブルダ
ウンカウンタ29に接続される。又バッテリ1の端子電
圧が残存電気量検出装置31に入力されこの残存電気量
検出装置31の出力電圧がアナログデジタルコンバータ
(ADコンバータ)33を介してプリセッタブルダウン
カウンタ29に人力される。
A load 21 and a shunt resistor 23 are connected in series to the battery 1 . The output voltage of the load 21 is connected to a presettable down counter 29 via an amplifier 25 and a voltage frequency converter (V/F) 27. Further, the terminal voltage of the battery 1 is inputted to the remaining electricity amount detection device 31, and the output voltage of the remaining electricity amount detection device 31 is inputted to the presettable down counter 29 via an analog-to-digital converter (AD converter) 33.

負荷21の出力電圧はアンプ25で増幅され電圧周波数
変換器27によりその電圧に応じた周波数を有するパル
ス信号Pかプリセッタブルダウンカウンタ29に入力さ
れる。
The output voltage of the load 21 is amplified by an amplifier 25, and a pulse signal P having a frequency corresponding to the voltage is inputted to a presettable down counter 29 by a voltage frequency converter 27.

又残存電気量検出装置31はバッテリ1の端子電圧から
m2図に示すような出力電圧をADコンバータ33に入
力する。ADコンバータ33はこの電圧をデジタル化し
プリセッタブルダウンカウンタ29のプリセット値とす
る。プリセッタブルダウンカウンタ29はプリセット値
から前記パルス信号Pをダウンカウントし始めそのカウ
ント数が例えば“0”になったときに充電要求信号を発
生する。
Further, the remaining electricity quantity detection device 31 inputs an output voltage as shown in the m2 diagram from the terminal voltage of the battery 1 to the AD converter 33. The AD converter 33 digitizes this voltage and uses it as a preset value for the presettable down counter 29. The presettable down counter 29 starts counting down the pulse signal P from a preset value, and generates a charge request signal when the count reaches, for example, "0".

すなわち残存電気量検出装置31によりバッテリ1の動
作開始時の残存電気量か検出されてこれがプリセッタブ
ルダウンカウンタ29のプリセット値となりプリセッタ
ブルダウンカウンタ29は負荷21の出力電圧がパルス
化されたパルス信号を前記プリセット値からダウンカウ
ントし始め所定数カウントすると充電要求信号を発生す
る。
That is, the remaining electricity amount detecting device 31 detects the remaining electricity amount at the start of operation of the battery 1, and this becomes the preset value of the presettable down counter 29. The presettable down counter 29 generates a pulse signal in which the output voltage of the load 21 is pulsed. starts counting down from the preset value and when a predetermined number of counts is reached, a charging request signal is generated.

第4図は本発明の第2の実施例に関するものでありマイ
クロコンピュータによりバッテリの残存電気量を検出す
るものである。
FIG. 4 relates to a second embodiment of the present invention, in which the amount of remaining electricity in the battery is detected by a microcomputer.

同図に示されるようにバッテリ1の端子電圧はADコン
バータ35に入力されてデジタル化されマイクロコンピ
ュータ37に入力される。マイクロコンピュータ37の
図示ししない読出し専用メモリ(ロム)には第2図に示
す端子電圧と残存電気量の関係を示すテーブルが記憶さ
れている。マイクロコンピュータ37は前記テーブルを
基にしてADコンバータ35を介して人力されるバッテ
リ端子電圧から残存電気量に相当する信号を発生する。
As shown in the figure, the terminal voltage of the battery 1 is input to an AD converter 35, digitized, and input to a microcomputer 37. A read-only memory (ROM, not shown) of the microcomputer 37 stores a table showing the relationship between the terminal voltage and the amount of remaining electricity as shown in FIG. The microcomputer 37 generates a signal corresponding to the remaining amount of electricity from the battery terminal voltage input manually via the AD converter 35 based on the table.

〔発明の効果〕〔Effect of the invention〕

以上詳細に説明したように本発明によればバッテリの充
電状態がどのような状態であってもバッテリの残存電気
量を正確に検出することができる。
As described above in detail, according to the present invention, the amount of remaining electricity in the battery can be accurately detected regardless of the state of charge of the battery.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の第一実施例に係るバッテリの残存電気
量検出装置の回路図、第2図はバッテリの端子電圧と残
存電気量の関係を示すグラフ、第3図は本実施例を利用
した充電要求発生回路の回路図、第4図は本発明の第二
の実施例に係る残存電気量検出装置の回路図である。 ■・・・バッテリ、2・・・アンプ、5−1.・・・、
5−m・・・コンパレータ、7・・・抵抗、9・・・ア
ンプ、13−1.・・・、13− (m+1)、17−
1.・・・。 17−m・・・抵抗、35・・・A/Dコンバータ、3
7・・・マイクロコンピュータ。 残・r+電気t (出力電L) 第2図
FIG. 1 is a circuit diagram of a battery remaining electricity amount detection device according to the first embodiment of the present invention, FIG. FIG. 4 is a circuit diagram of the charging request generating circuit used, and FIG. 4 is a circuit diagram of a remaining electricity amount detecting device according to a second embodiment of the present invention. ■...Battery, 2...Amplifier, 5-1. ...,
5-m... Comparator, 7... Resistor, 9... Amplifier, 13-1. ..., 13- (m+1), 17-
1. .... 17-m...Resistor, 35...A/D converter, 3
7...Microcomputer. Remaining r + electricity t (output electricity L) Figure 2

Claims (1)

【特許請求の範囲】 所定の放電電流を流したときのバッテリの端子電圧を検
出する手段と、 該検出する手段によって検出された端子電圧をバッテリ
の残存電気量に対応する信号に変換する手段と を具えたことを特徴とするバッテリの残存電気量検出装
置。
[Scope of Claims] Means for detecting the terminal voltage of the battery when a predetermined discharge current is passed through the battery; and means for converting the terminal voltage detected by the detecting means into a signal corresponding to the remaining amount of electricity in the battery. A battery remaining electricity quantity detection device characterized by comprising:
JP61079854A 1986-04-07 1986-04-07 Detector for residual quantity of electricity in battery Pending JPS62237370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61079854A JPS62237370A (en) 1986-04-07 1986-04-07 Detector for residual quantity of electricity in battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61079854A JPS62237370A (en) 1986-04-07 1986-04-07 Detector for residual quantity of electricity in battery

Publications (1)

Publication Number Publication Date
JPS62237370A true JPS62237370A (en) 1987-10-17

Family

ID=13701783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61079854A Pending JPS62237370A (en) 1986-04-07 1986-04-07 Detector for residual quantity of electricity in battery

Country Status (1)

Country Link
JP (1) JPS62237370A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994017425A1 (en) * 1993-01-27 1994-08-04 Seiko Epson Corporation Battery capacity meter
WO2012120564A1 (en) * 2011-03-09 2012-09-13 株式会社 日立製作所 Secondary battery system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994017425A1 (en) * 1993-01-27 1994-08-04 Seiko Epson Corporation Battery capacity meter
WO2012120564A1 (en) * 2011-03-09 2012-09-13 株式会社 日立製作所 Secondary battery system
JPWO2012120564A1 (en) * 2011-03-09 2014-07-07 株式会社日立製作所 Secondary battery system

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