JPH03273180A - Detector for battery capacity - Google Patents

Detector for battery capacity

Info

Publication number
JPH03273180A
JPH03273180A JP2074680A JP7468090A JPH03273180A JP H03273180 A JPH03273180 A JP H03273180A JP 2074680 A JP2074680 A JP 2074680A JP 7468090 A JP7468090 A JP 7468090A JP H03273180 A JPH03273180 A JP H03273180A
Authority
JP
Japan
Prior art keywords
battery
circuit
accumulation
capacity
inputted
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
JP2074680A
Other languages
Japanese (ja)
Inventor
Jo Morishita
森下　丈
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP2074680A priority Critical patent/JPH03273180A/en
Publication of JPH03273180A publication Critical patent/JPH03273180A/en
Pending legal-status Critical Current

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  • Tests Of Electric Status Of Batteries (AREA)

Abstract

PURPOSE:To obtain a detector of battery capacity capable of discriminating always the residual capacity of battery by learning the consumption amount of battery from the accumulated value of load supply current. CONSTITUTION:A voltage V0 generated at the both ends of a resistor R is inputted to an A/D conversion circuit 1 and subjected to A/D conversion. The output of circuit 1 is inputted to an accumulating circuit 2, wherein the accumulation of successively inputted results from the A/D conversion is calculated. This is the accumulation of voltages generated by the currents flowing in the resistor R and can be regarded as the accumulation of currents accordingly. Therefore, the accumulation of currents flowing in a load from the battery, i.e., the consumption amount of battery capacity, can be obtained as the output of this circuit 2. The output of circuit 2 is inputted to a subtracting circuit 3. To another input of the circuit 3, an initial capacity of battery is being inputted from a control circuit 4 as a constant. Then, a calculation of (initial capacity of battery) - (accumulated consumption amount) is performed and the residual capacity of battery is outputted.

Description

【発明の詳細な説明】 技術分野 本発明は電池容量検出装置に関し、特に電池を主電源と
する電子装置に用いて好適な電池容量検出装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a battery capacity detection device, and more particularly to a battery capacity detection device suitable for use in an electronic device whose main power source is a battery.

従来技術 従来、電池の容量をｆＩｌ別する方法として、その出力
電圧値を用いる方法がある。電池出力電圧値を用いる方
法では、放電途中の電圧が平坦な部分（第２図の電池電
圧と時間との関係を示すグラフにおいて、Ａ−８間の部
分）では、電池がとれだけ使用され放電され、後とれた
け残っているかを１１１別することは不可能である。BACKGROUND ART Conventionally, as a method of determining battery capacity by fIl, there is a method of using its output voltage value. In the method using the battery output voltage value, in the part where the voltage is flat during discharging (the part between A and 8 in the graph showing the relationship between battery voltage and time in Figure 2), the battery is used to the fullest and is discharged. It is impossible to distinguish between 111 and how much is left behind.

発明の１−１的 そこで、本発明はこの様な従来のものの欠点を除大ずべ
くなされたものであって、その目的とするところは、電
池の残容量を常に識別可能な電池容量検出装置を堤供す
ることにある。Aspects of the Invention 1-1 Therefore, the present invention has been made to eliminate the drawbacks of the conventional devices, and its purpose is to provide a battery capacity detection device that can always identify the remaining capacity of the battery. The purpose is to provide.

発明の構成 本発明による電池容量検出装置は、電池から負不：ｆへ
の供給電流を検出して電圧に変換する手段と、この変換
電圧値を逐次累積する手段と、この累積奉吉果とＴ・め
設定された電池容量値との差を算出する手段とを含むこ
とを特徴としている。Structure of the Invention The battery capacity detecting device according to the present invention includes means for detecting the current supplied from the battery to the negative and negative terminals and converting it into a voltage, means for successively accumulating the converted voltage value, and the cumulative effect. The present invention is characterized in that it includes means for calculating the difference between the battery capacity value and the set battery capacity value.

実施例 次に本発明の一実施例について図面を参照して説明する
。Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

第１図は本発明の一実施例を示すブロック図である。負
荷に比べ十分中さなインピーダンスである抵抗Ｒが電池
ＢＴと負荷との間に直列に押入されている。この抵抗Ｒ
の両端に発生する電圧ＶＯがＡ／Ｄ変換回路１へ入力さ
れてＡ／Ｄ変換される。FIG. 1 is a block diagram showing one embodiment of the present invention. A resistor R whose impedance is sufficiently moderate compared to the load is inserted in series between the battery BT and the load. This resistance R
A voltage VO generated across the terminal is input to the A/D conversion circuit 1 and A/D converted.

この時、＾／Ｄ変換のサンプリング周期は入力端子ｖＯ
の周波数成分を十分カバーできる周期に選ぶ。At this time, the sampling period of ^/D conversion is the input terminal vO
Select a period that sufficiently covers the frequency components of .

Ａ／Ｄ変換回路１の出力は累積回路２へ人力され逐次人
力される＾／Ｄ変換結果の累積が演算される。The output of the A/D conversion circuit 1 is manually input to an accumulation circuit 2, and the cumulative result of the input ^/D conversion is calculated.

この累積は抵抗Ｒを流れる電流によって発生した電圧の
累積であるから電流の累積と見なすことができる。従っ
て、電池から負荷に流れた電流の累積、すなわち電池の
容量の消費分をこの累積回路２の出力として得ることが
できる。Since this accumulation is an accumulation of voltages generated by the current flowing through the resistor R, it can be regarded as an accumulation of current. Therefore, the accumulation of current flowing from the battery to the load, that is, the consumption of the capacity of the battery, can be obtained as the output of the accumulation circuit 2.

累積回路２の出力は減算回路３へ人力される。The output of the accumulation circuit 2 is input to the subtraction circuit 3.

減算回路３の他方の入力には制御回路４から電池の初期
容量が定数として人力されている。そこで、減算回路３
では（電池の初期容量）−（累積消費量）が演算され、
残っている電池容量が出力される。The other input of the subtraction circuit 3 is manually inputted from the control circuit 4 with the initial capacity of the battery as a constant. Therefore, subtraction circuit 3
Then, (initial capacity of battery) - (cumulative consumption) is calculated,
The remaining battery capacity is output.

制御回路４は＾／Ｄ変換回路１へのサンプリングのタイ
ミング、累積回路２への累積演算のタイミング及び減算
回路３への電池の初期容量値を出力する機能を有する。The control circuit 4 has the functions of outputting sampling timing to the ^/D conversion circuit 1, cumulative operation timing to the accumulating circuit 2, and outputting the initial capacity value of the battery to the subtracting circuit 3.

発明の効果 以上述べた如く、本発明によれば、負荷供給電流の累積
値から電池の消費量を得ているので、初期容量との差か
ら電池の残容量を常に識別できるという効果がある。Effects of the Invention As described above, according to the present invention, since the battery consumption amount is obtained from the cumulative value of the load supply current, the remaining capacity of the battery can always be identified from the difference from the initial capacity.

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

第１図は本発明の実施例のブロック図、第２図は電池の
放電特性を示すグラフである。 主要部分の符号の説明 １・・・・・・＾／Ｄ変換回路 ２・・・・・・累積回路 ３・・・・・・減算回路 ４・・・・・・制御回路 Ｒ・・・・・・抵抗 ＢＴ・・・・・・電池FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a graph showing the discharge characteristics of the battery. Explanation of symbols of main parts 1...^/D conversion circuit 2...Accumulation circuit 3...Subtraction circuit 4...Control circuit R...・Resistance BT・・・Battery

Claims (1)

【特許請求の範囲】[Claims] （１）電池から負荷への供給電流を検出して電圧に変換
する手段と、この変換電圧値を逐次累積する手段と、こ
の累積結果と予め設定された電池容量値との差を算出す
る手段とを含むことを特徴とする電池容量検出装置。(1) Means for detecting the current supplied from the battery to the load and converting it into voltage, means for successively accumulating this converted voltage value, and means for calculating the difference between this accumulation result and a preset battery capacity value. A battery capacity detection device comprising:
JP2074680A 1990-03-23 1990-03-23 Detector for battery capacity Pending JPH03273180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2074680A JPH03273180A (en) 1990-03-23 1990-03-23 Detector for battery capacity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2074680A JPH03273180A (en) 1990-03-23 1990-03-23 Detector for battery capacity

Publications (1)

Publication Number Publication Date
JPH03273180A true JPH03273180A (en) 1991-12-04

Family

ID=13554183

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2074680A Pending JPH03273180A (en) 1990-03-23 1990-03-23 Detector for battery capacity

Country Status (1)

Country Link
JP (1) JPH03273180A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404040A (en) * 1990-12-21 1995-04-04 Siliconix Incorporated Structure and fabrication of power MOSFETs, including termination structures
US5429964A (en) * 1990-12-21 1995-07-04 Siliconix Incorporated Low on-resistance power MOS technology
CN108445407A (en) * 2018-03-19 2018-08-24 浙江国自机器人技术有限公司 A kind of detection method of quantity of electricity, device and computer readable storage medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404040A (en) * 1990-12-21 1995-04-04 Siliconix Incorporated Structure and fabrication of power MOSFETs, including termination structures
US5429964A (en) * 1990-12-21 1995-07-04 Siliconix Incorporated Low on-resistance power MOS technology
US5521409A (en) * 1990-12-21 1996-05-28 Siliconix Incorporated Structure of power mosfets, including termination structures
CN108445407A (en) * 2018-03-19 2018-08-24 浙江国自机器人技术有限公司 A kind of detection method of quantity of electricity, device and computer readable storage medium

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