JP2000012104A - Method and device for displaying residual capacity of battery - Google Patents
Method and device for displaying residual capacity of batteryInfo
- Publication number
- JP2000012104A JP2000012104A JP10177484A JP17748498A JP2000012104A JP 2000012104 A JP2000012104 A JP 2000012104A JP 10177484 A JP10177484 A JP 10177484A JP 17748498 A JP17748498 A JP 17748498A JP 2000012104 A JP2000012104 A JP 2000012104A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- internal resistance
- information
- life
- temperature
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、繰り返し充電が可
能である着脱式の２次電池に対する電池の寿命検出機能
を有した電池残容量表示方法および同方法を実現するた
めの電池残容量表示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 a battery remaining capacity display method having a battery life detecting function for a detachable secondary battery capable of being repeatedly charged, and a battery remaining capacity display device for realizing the method. It is about.
【０００２】[0002]
【従来の技術】従来、この種の電池残容量表示方法とし
ては、例えば特開平６−２０７２３号公報に記載され、
図５に示すように充放電を繰り返して使用する２次電池
の電池残量表示装置に用いられた表示方法が知られてい
る。2. Description of the Related Art Conventionally, a method of displaying the remaining battery capacity of this type is described in, for example, JP-A-6-20723.
As shown in FIG. 5, there is known a display method used for a battery remaining amount display device of a secondary battery that is repeatedly used for charging and discharging.
【０００３】以下、図５を参照して、前記従来の２次電
池の電池残量表示装置および表示方法について説明す
る。[0003] Referring to FIG. 5, a description will be given of a conventional battery remaining amount display device and display method for a secondary battery.
【０００４】図５において、１６は繰り返し充放電可能
な２次電池、１７は充放電電流値を検出する充電・放電
電流検出回路、２４は温度を測定する温度検出回路、１
９は充電・放電電流検出回路１７からのアナログ情報と
温度検出回路２４からのアナログ情報とをデジタル情報
に変換するアナログ信号／ディジタル信号変換器（ＡＤ
変換器）１８を内蔵したマイクロプロセッサユニット
（ＭＰＵ）であり、このＭＰＵ１９には操作・表示部２
２と外部メモリ２３とが接続されている。In FIG. 5, reference numeral 16 denotes a rechargeable battery which can be repeatedly charged and discharged; 17 a charge / discharge current detection circuit for detecting a charge / discharge current value; 24 a temperature detection circuit for measuring temperature;
An analog / digital signal converter (AD) 9 converts analog information from the charge / discharge current detection circuit 17 and analog information from the temperature detection circuit 24 into digital information.
A microprocessor unit (MPU) having a built-in converter (converter) 18.
2 and the external memory 23 are connected.
【０００５】なお、図中の２０は充電器、２１は抵抗、
２５は充電器検出部、２６は出力スイッチ、２７，２８
はダイオード、２９は電圧検出回路である。In the drawing, reference numeral 20 denotes a charger, 21 denotes a resistor,
25 is a charger detector, 26 is an output switch, 27 and 28
Is a diode, and 29 is a voltage detection circuit.
【０００６】以上のように構成された従来の電池残量表
示装置について、以下にその概略動作を説明する。The general operation of the conventional battery remaining amount display device configured as described above will be described below.
【０００７】外部メモリ２３には、周囲温度による電池
の放電特性データおよび放電電流値による電池の放電特
性データが記憶されており、ＭＰＵ１９において放電電
流値と放電時間を積算し、そのときの温度および放電電
流値に基づいて放電効率を、外部メモリ２３に記憶され
ている各放電特性データを参照して求めて修正を行い、
充電量から放電量を差し引いた電池残容量を操作・表示
部２２に表示していた。The external memory 23 stores the battery discharge characteristic data based on the ambient temperature and the battery discharge characteristic data based on the discharge current value. The MPU 19 integrates the discharge current value and the discharge time, and the temperature and the discharge time at that time are integrated. The discharge efficiency is determined based on the discharge current value by referring to each discharge characteristic data stored in the external memory 23, and is corrected.
The operation / display unit 22 displays the remaining battery capacity obtained by subtracting the discharge amount from the charge amount.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、前記従
来の電池残量表示装置では、電池の経年劣化による電池
の内部抵抗増大が原因となる電池寿命変動、あるいは電
池を着脱、交換した際に充電量の積算データがないため
に電池残容量を十分補正できないという問題があった。However, in the conventional battery remaining amount display device, the battery life varies due to an increase in the internal resistance of the battery due to the aging of the battery, or the charge amount when the battery is removed or replaced. However, there is a problem that the remaining battery capacity cannot be sufficiently corrected because there is no integrated data.
【０００９】本発明は、前記従来の問題を解決するもの
であり、電池が着脱、交換されても、定期的にまたは任
意に、電池の内部抵抗あるいは電池電圧などの電池の状
態を把握する手段を備え、電池の経年劣化に対する電池
の寿命表示あるいは電池の寿命変動に合わせた電池残容
量の補正を可能にし、さらには周囲温度，負荷電流に対
する補正を行うことによって、より正確な電池残容量の
表示を実現する電池残容量表示方法および電池残容量表
示装置を提供することを目的とする。The present invention has been made to solve the above-mentioned conventional problems, and means for periodically or arbitrarily grasping a state of a battery, such as an internal resistance or a battery voltage, even if the battery is detached or replaced. The battery life can be displayed in response to battery aging or the remaining battery capacity can be corrected in accordance with battery life fluctuations. Further, by correcting the ambient temperature and load current, more accurate remaining battery capacity can be obtained. It is an object of the present invention to provide a battery remaining capacity display method and a battery remaining capacity display device for realizing display.
【００１０】[0010]
【課題を解決するための手段】本発明は、前記目的を達
成するために、電池の寿命を判断する手段として、電池
の内部抵抗を測定する手段の定電流負荷回路と、電池電
圧を検出する手段の電池電圧検出回路と、電池の周囲温
度を検出する手段の温度検出素子と、装置の負荷回路に
よる負荷電流を概算する手段の制御回路とを有し、さら
に予めメモリに記憶してある電池の内部抵抗，周囲温
度，負荷電流の各対応データと、前記手段から検出した
情報を制御回路により比較、補正して電池寿命を判断す
る機能を備えたことにより、電池寿命時には使用者に対
して表示または特殊音により電池の交換を促すよう通知
するほか、電池残容量の表示においては、温度条件，負
荷条件，電池条件を問わず正確な電池残容量の表示を行
うようにしたものである。In order to achieve the above object, the present invention provides a constant current load circuit for measuring the internal resistance of a battery and a battery voltage detecting means for judging the life of the battery. A battery voltage detecting circuit, a temperature detecting element for detecting an ambient temperature of the battery, and a control circuit for calculating a load current by a load circuit of the apparatus. The control circuit compares and corrects the corresponding data of the internal resistance, ambient temperature and load current with the information detected from the above means by means of a control circuit to determine the battery life. In addition to notifying the user to replace the battery with a display or special sound, the remaining battery level is displayed accurately regardless of the temperature, load, and battery conditions. That.
【００１１】[0011]
【発明の実施の形態】本発明の請求項１に記載の発明
は、電池内部抵抗情報と、電池電圧情報と、電池周囲温
度情報との３つの情報を検出し、予めメモリに記憶して
ある電池寿命による内部抵抗対応データと、温度変化に
よる温度対応データとを読み出し、前記電池内部抵抗情
報，電池電圧情報，電池周囲温度情報および前記内部抵
抗対応データ，温度対応データを比較、補正することに
より、周囲の温度変化を考慮した電池の内部抵抗値を検
出して電池の寿命を判断し、その判断結果に基づいて電
池残容量の表示を行うことを特徴とした電池残容量表示
方法であり、前記３つの情報と前記２つの対応データと
を比較、補正することにより、周囲の温度変化を考慮し
た電池の寿命を判断することができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, three pieces of information, namely, battery internal resistance information, battery voltage information, and battery ambient temperature information are detected and stored in a memory in advance. By reading data corresponding to internal resistance due to battery life and data corresponding to temperature due to temperature change, comparing and correcting the battery internal resistance information, battery voltage information, battery ambient temperature information and the internal resistance corresponding data, temperature corresponding data. A battery remaining capacity display method characterized by detecting the internal resistance value of the battery in consideration of ambient temperature change, determining the battery life, and displaying the remaining battery capacity based on the determination result. By comparing and correcting the three pieces of information and the two pieces of corresponding data, it is possible to determine the life of the battery in consideration of a change in ambient temperature.
【００１２】請求項２に記載の発明は、電池内部抵抗情
報と、電池電圧情報と、電池周囲温度情報と、装置の負
荷回路による負荷電流情報とを検出し、予めメモリに記
憶してある電池寿命による内部抵抗対応データと、温度
変化による温度対応データと、負荷変動による負荷電流
対応データとを読み出し、前記電池内部抵抗情報，電池
電圧情報，電池周囲温度情報，負荷電流情報および前記
内部抵抗対応データ，温度対応データ，負荷電流対応デ
ータを比較、補正することにより、電池の経年劣化によ
る容量変化、あるいは周囲の温度変化、あるいは負荷変
動を考慮して電池の寿命を判断し、その判断結果に基づ
いて電池残容量の表示を行うことを特徴とする電池残容
量表示方法であり、前記４つの情報と前記３つの対応デ
ータとを比較、補正することにより、電池の経年劣化に
よる容量変化や周囲の温度変化、さらには負荷変動を考
慮した電池残容量の補正が可能となり、より正確に電池
残容量を表示することができる。According to a second aspect of the present invention, there is provided a battery which detects battery internal resistance information, battery voltage information, battery ambient temperature information, and load current information by a load circuit of the apparatus, and stores the information in a memory in advance. The data corresponding to the internal resistance due to the life, the data corresponding to the temperature due to the temperature change, and the data corresponding to the load current due to the load change are read out, and the battery internal resistance information, battery voltage information, battery ambient temperature information, load current information, and the internal resistance corresponding data are read. By comparing and correcting the data, temperature data, and load current data, the battery life is determined in consideration of the capacity change due to the aging of the battery, the ambient temperature change, or the load fluctuation. A remaining battery capacity display method for displaying the remaining battery capacity on the basis of the remaining information, and comparing and complementing the four pieces of information with the three pieces of corresponding data. By, capacitance change and ambient temperature changes due to aging of the battery, and further it is possible to correct the remaining battery in consideration of load variation, it is possible to display a more accurate battery remaining capacity.
【００１３】請求項３に記載の発明は、請求項１または
２記載の電池残容量表示方法において、電池の内部抵抗
を検出する検出回路を動作させ、そのときの負荷電流お
よび電圧降下により、オームの法則から内部抵抗を算出
し、予めメモリに記憶してある電池正常時の内部抵抗値
と電池寿命時の内部抵抗値とから電池の寿命レベルを判
断するものである。According to a third aspect of the present invention, in the battery remaining capacity display method according to the first or second aspect, the detection circuit for detecting the internal resistance of the battery is operated, and the load current and the voltage drop at that time cause the ohmic operation. Is used to calculate the internal resistance, and determine the life level of the battery from the internal resistance value when the battery is normal and the internal resistance value when the battery is in service stored in the memory in advance.
【００１４】請求項４に記載の発明は、請求項１または
２記載の電池残容量表示方法において、電池の内部抵抗
を検出する検出回路が動作するたびに内部抵抗の算出結
果をメモリに更新して記憶し、この算出結果を電池残容
量表示の際に参照することにより、電池寿命を考慮した
電池残容量の補正を行うものであり、この方法により、
定期的にまたは任意に、常に電池寿命を考慮した電池残
容量の補正を行うことが可能になる。According to a fourth aspect of the present invention, in the battery remaining capacity display method according to the first or second aspect, every time the detection circuit for detecting the internal resistance of the battery operates, the calculation result of the internal resistance is updated in the memory. By referring to the calculation result when displaying the remaining battery capacity, the remaining battery capacity is corrected in consideration of the battery life.
The battery remaining capacity can be regularly or arbitrarily corrected in consideration of the battery life.
【００１５】請求項５に記載の発明は、請求項３または
４記載の電池残容量表示方法において、電池が着脱ある
いは交換される際、または電源が投入されたとき、また
は予め定められた期間が満了したとき等、何らかの割込
み要因が発生したときに検出回路を動作させるものであ
り、この方法により、時々刻々と変化している電池の状
態を監視することができる。According to a fifth aspect of the present invention, in the battery remaining capacity display method according to the third or fourth aspect, when a battery is attached / detached or replaced, when the power is turned on, or when a predetermined period is set. The detection circuit is operated when some kind of interrupt factor occurs, such as when the battery expires, and by this method, it is possible to monitor the state of the battery that is changing every moment.
【００１６】請求項６に記載の発明は、電池の内部抵抗
が増大して電池寿命と判断したときは、表示部に電池交
換表示を行うとともに、電池交換を促す特殊音を発生さ
せるものであり、この方法により、電池寿命による電池
の交換時期を使用者に確実に報知することができるよう
になる。According to a sixth aspect of the present invention, when it is determined that the battery has reached the end of its life due to an increase in internal resistance of the battery, a battery replacement display is displayed on the display unit and a special sound prompting the user to replace the battery is generated. According to this method, it is possible to reliably notify the user of the battery replacement time based on the battery life.
【００１７】請求項７に記載の発明は、電池内部抵抗情
報としての電池の寿命を検出する定電流負荷回路と、電
池電圧情報としての電池の電圧を検出する電池電圧検出
回路と、温度情報としての電池の周囲温度を検出する温
度検出素子と、電池寿命による内部抵抗対応データおよ
び温度変化による温度対応データとが予め記録されたメ
モリと、前記電池内部抵抗情報，電池電圧情報，温度情
報および前記内部抵抗対応データ，温度対応データを入
力して比較、補正することにより、周囲の温度変化を考
慮した電池の内部抵抗値を検出して電池の寿命を判断
し、その判断結果に基づいて電池残容量の表示を行わせ
る制御回路とを備えたことを特徴とする電池残容量表示
装置であり、前記制御回路により、前記３つの情報と前
記２つの対応データとを比較、補正することによって、
周囲の温度変化を考慮した電池の内部抵抗値を検出し
て、電池の寿命を判断するため、正確に電池残容量を表
示することができる。According to a seventh aspect of the present invention, there is provided a constant current load circuit for detecting battery life as battery internal resistance information, a battery voltage detection circuit for detecting battery voltage as battery voltage information, and a temperature information as temperature information. A temperature detecting element for detecting the ambient temperature of the battery, a memory in which internal resistance correspondence data based on battery life and temperature correspondence data based on temperature change are recorded in advance, and the battery internal resistance information, battery voltage information, temperature information, By inputting and comparing the internal resistance data and temperature data, the internal resistance value of the battery in consideration of the ambient temperature change is detected and the life of the battery is determined. And a control circuit for displaying a capacity of the battery, wherein the control circuit controls the three pieces of information and the two pieces of corresponding data. By comparison, to compensate for,
Since the internal resistance value of the battery in consideration of the ambient temperature change is detected to determine the life of the battery, the remaining battery capacity can be accurately displayed.
【００１８】請求項８に記載の発明は、装置に設けられ
ている負荷回路と、電池内部抵抗情報としての電池の寿
命を検出する定電流負荷回路と、電池電圧情報としての
電池の電圧を検出する電池電圧検出回路と、温度情報と
しての電池の周囲温度を検出する温度検出素子と、電池
寿命による内部抵抗対応データおよび温度変化による温
度対応データおよび負荷変動による負荷電流対応データ
とが予め記録されたメモリと、前記電池内部抵抗情報，
電池電圧情報，温度情報，前記装置の負荷回路からの負
荷電流情報および前記内部抵抗対応データ，温度対応デ
ータ，負荷電流対応データを入力して、電池の経年劣化
による容量変化、あるいは周囲の温度変化、あるいは負
荷変動を考慮して電池の寿命を判断し、その判断結果に
基づいて電池残容量の表示を行わせる制御回路とを備え
たことを特徴とする電池残容量表示装置であり、前記制
御回路により、前記４つの情報と前記３つの対応データ
とを比較、補正することによって、電池の経年劣化によ
る容量変化や周囲の温度変化、さらには負荷変動を考慮
した電池残容量の補正が可能となり、より正確に電池残
容量を表示することができる。According to the present invention, there is provided a load circuit provided in the apparatus, a constant current load circuit for detecting a battery life as battery internal resistance information, and a battery voltage as battery voltage information. Battery voltage detection circuit, a temperature detection element that detects the ambient temperature of the battery as temperature information, and data corresponding to internal resistance due to battery life, data corresponding to temperature due to temperature change, and data corresponding to load current due to load fluctuation are recorded in advance. Memory and the battery internal resistance information,
Input the battery voltage information, temperature information, load current information from the load circuit of the device and the internal resistance corresponding data, temperature corresponding data, and load current corresponding data to change the capacity due to aging of the battery or change in ambient temperature. Or a control circuit for judging the life of the battery in consideration of the load fluctuation, and displaying the remaining battery capacity based on the judgment result. By comparing and correcting the four pieces of information and the three pieces of corresponding data by the circuit, it becomes possible to correct the remaining capacity of the battery in consideration of a change in capacity due to aging of the battery, a change in ambient temperature, and a load change. Thus, the remaining battery capacity can be displayed more accurately.
【００１９】請求項９に記載の発明は、請求項７または
８記載の電池残容量表示装置において、制御回路が、電
池の寿命を検出するために、電池の内部抵抗を測定する
定電流負荷回路を動作させたときの負荷電流とそのとき
の電圧降下により、オームの法則から内部抵抗を算出
し、予めメモリに記憶してある電池正常時の内部抵抗値
と電池寿命時の内部抵抗値とから電池の寿命レベルを判
断する構成である。According to a ninth aspect of the present invention, in the battery remaining capacity display device according to the seventh or eighth aspect, the control circuit measures the internal resistance of the battery in order to detect the life of the battery. By operating the load current and the voltage drop at that time, the internal resistance is calculated from Ohm's law, and the internal resistance value when the battery is normal and the internal resistance value during the life of the battery stored in advance in the memory are used. This is a configuration for determining the battery life level.
【００２０】請求項１０に記載の発明は、請求項７また
は８記載の電池残容量表示装置において、メモリに対し
て定電流負荷回路が動作するたびに内部抵抗の算出結果
をメモリに更新、記憶し、制御回路が電池残容量表示の
際に前記算出結果を参照することにより、電池寿命を考
慮した電池残容量の補正を行う構成であり、この構成に
よって、定期的にまたは任意に、常に電池寿命を考慮し
た電池残容量の補正を行うことが可能になる。According to a tenth aspect of the present invention, in the battery remaining capacity display device according to the seventh or eighth aspect, each time the constant current load circuit operates on the memory, the calculation result of the internal resistance is updated and stored in the memory. The control circuit refers to the calculation result at the time of displaying the remaining battery capacity, and thereby corrects the remaining battery capacity in consideration of the battery life. It becomes possible to correct the remaining battery capacity in consideration of the service life.
【００２１】請求項１１に記載の発明は、請求項７〜１
０のいずれか１項記載の電池残容量表示装置において、
定電流負荷回路が、電池が着脱あるいは交換される際、
または電源が投入されたとき、または予め定められた期
間が満了したとき等、何らかの割込み要因が発生したと
きに動作する構成であり、この構成によって、時々刻々
と変化している電池の状態を監視することができる。[0021] The invention described in claim 11 is the invention according to claims 7-1.
0, the battery remaining capacity display device according to any one of
When the constant current load circuit removes or replaces the battery,
Or, when the power is turned on or when a predetermined period has expired, it operates when an interrupt factor occurs, and this configuration monitors the state of the battery that is constantly changing. can do.
【００２２】請求項１２に記載の発明は、請求項７〜１
１のいずれか１項記載の電池残容量表示装置において、
電池の内部抵抗が増大して電池寿命と判断したときに、
表示部に電池交換表示を行うとともに、電池交換を促す
特殊音を発生させる報知手段を備えたものであり、この
構成によって、電池寿命による電池の交換時期を使用者
に確実に報知することができるようになる。[0022] The invention of claim 12 is the invention of claims 7-1.
The battery remaining capacity display device according to any one of claims 1,
When the internal resistance of the battery increases and the battery life is determined,
In addition to displaying a battery replacement display on the display unit, the display unit is provided with a notifying means for generating a special sound for urging battery replacement. With this configuration, it is possible to reliably notify the user of the battery replacement time due to the battery life. Become like
【００２３】以下、本発明の実施の形態を図面を参照し
て説明する。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
【００２４】図１は本発明の一実施形態を説明するため
の電池残容量表示装置の構成を示すブロック図である。FIG. 1 is a block diagram showing the configuration of a battery remaining capacity display device for explaining an embodiment of the present invention.
【００２５】図１において、１は、装置に着脱，交換が
可能な充電式の２次電池であり、電池の内部保護回路２
と電池の内部抵抗３を備えている。さらに、４は温度情
報である２次電池１の周囲温度を監視するように２次電
池１に近接配置された温度検出素子、５は電池電圧情報
である２次電池１の電圧を検出する電池電圧検出回路、
６は電池電圧検出回路５を制御する電子スイッチ、７は
電池内部抵抗情報である２次電池１の内部抵抗を測定す
るときに動作する定電流負荷回路、８は定電流負荷回路
７を制御する電子スイッチである。９〜９ｎは、装置に
設置された複数の各負荷であり、１０〜１０ｎは各負荷
９〜９ｎを制御する電子スイッチである。In FIG. 1, reference numeral 1 denotes a rechargeable rechargeable battery which can be attached to and detached from the device, and is replaced by an internal protection circuit 2 for the battery.
And the internal resistance 3 of the battery. Further, reference numeral 4 denotes a temperature detecting element arranged close to the secondary battery 1 so as to monitor the ambient temperature of the secondary battery 1 which is temperature information, and 5 denotes a battery which detects the voltage of the secondary battery 1 which is battery voltage information. Voltage detection circuit,
Reference numeral 6 denotes an electronic switch that controls the battery voltage detection circuit 5, reference numeral 7 denotes a constant current load circuit that operates when measuring the internal resistance of the secondary battery 1 that is battery internal resistance information, and reference numeral 8 denotes a constant current load circuit 7. It is an electronic switch. 9 to 9n are a plurality of loads installed in the apparatus, and 10 to 10n are electronic switches for controlling the loads 9 to 9n.
【００２６】１１は、電池電圧検出回路５および温度検
出素子４からのアナログ信号情報をディジタル信号情報
に変換するＡ／Ｄ変換器１１ａを内蔵し、かつ電子スイ
ッチ６，８，１０〜１０ｎを制御し、装置全体の動作を
行う制御回路、１２は、電池残容量表示の判定しきい
値，電池内部抵抗変動による内部抵抗対応データ，温度
変化に対する温度対応データ，負荷変動に対する負荷電
流対応データなどが記録され、任意に何度でも読み書き
が可能なＥＥＰＲＯＭ（以下、メモリと称する）、１３
は電池残容量の表示などを行う表示部、１４は装置の動
作において様々な音を出力するスピーカ、１５は充電検
出回路である。Reference numeral 11 includes an A / D converter 11a for converting analog signal information from the battery voltage detection circuit 5 and the temperature detection element 4 into digital signal information, and controls the electronic switches 6, 8, 10 to 10n. The control circuit 12 performs the operation of the entire apparatus. The control circuit 12 includes a determination threshold value for the remaining battery capacity display, internal resistance corresponding data due to battery internal resistance fluctuation, temperature corresponding data for temperature change, load current corresponding data for load change, and the like. An EEPROM (hereinafter referred to as a memory) which is recorded and can be read and written any number of times, 13
Is a display unit for displaying the remaining battery capacity, etc., 14 is a speaker for outputting various sounds in the operation of the apparatus, and 15 is a charge detection circuit.
【００２７】以上のように構成された本発明に係る電池
残容量表示装置の一実施形態における電池残容量表示方
法について、図１，図２，図４を用いて説明する。A method of displaying the remaining battery capacity in the embodiment of the battery remaining capacity display apparatus according to the present invention having the above-described configuration will be described with reference to FIGS.
【００２８】図２は本発明に係る電池残容量表示方法の
第１実施形態における経年劣化による電池寿命を判断す
る処理手順を示すフローチャートであり、図４は本発明
の第１実施形態および後述する第２実施形態におけるメ
モリ１２に記憶してある各対応データであって、図４
（ａ）は負荷電流対応データ、図４（ｂ）は温度対応デ
ータ、図４（ｃ）は内部抵抗対応データである。FIG. 2 is a flowchart showing a processing procedure for judging the battery life due to aging in the first embodiment of the battery remaining capacity display method according to the present invention, and FIG. 4 is a flowchart showing the first embodiment of the present invention and will be described later. FIG. 4 shows each corresponding data stored in the memory 12 in the second embodiment.
4A shows load current data, FIG. 4B shows temperature data, and FIG. 4C shows internal resistance data.
【００２９】まず、図２に示すＳＴ１の処理において、
装置の電源がキー入力あるいはスイッチあるいはタイマ
ーなどの何らかの電源投入手段によりオンされることに
より、ＳＴ２の電池寿命測定割込み検出処理に移行す
る。この割込み検出処理の要因としては、ＳＴ１の処理
による電源投入のとき、あるいはユーザ設定割込み（ユ
ーザの要求があるときのみ処理を行う割込み）、あるい
はタイマ割込み（電池寿命検出タイマにより一定周期ご
とに検出する割込み）、あるいは充電，非充電の状態検
出割込み等がある。First, in the process of ST1 shown in FIG.
When the power of the apparatus is turned on by a key input or some power-on means such as a switch or a timer, the processing shifts to the battery life measurement interrupt detection processing in ST2. The factors of this interrupt detection processing are as follows: when power is turned on by the processing of ST1, a user setting interrupt (interrupt that performs processing only when there is a user request), or a timer interrupt (detected at regular intervals by a battery life detection timer). Interrupt, or a charge / non-charge state detection interrupt.
【００３０】ＳＴ２の処理において、割込みを検出した
場合、ＳＴ３の判断処理に移行し、図１の制御回路１１
にて、充電検出回路１５からの検出結果より、装置が充
電中か否かを判断する。When an interrupt is detected in the process of ST2, the process proceeds to the determination process of ST3, and the control circuit 11 shown in FIG.
It is determined from the detection result from the charge detection circuit 15 whether or not the device is being charged.
【００３１】ＳＴ３の判断処理において、充電中と判断
した場合（No）は、ＳＴ１５の通常動作に移行し、割込
み要因を検出するまで再度監視を続けるため、ＳＴ２の
処理に移行する。また、ＳＴ３の判断処理において、非
充電と判断した場合(Yes)は、ＳＴ４以降の処理により
電池の内部抵抗測定処理を行う。In the determination process of ST3, when it is determined that charging is being performed (No), the process shifts to the normal operation of ST15, and the monitoring is continued again until an interrupt factor is detected, so that the process shifts to the process of ST2. When it is determined that the battery is not charged in the determination process of ST3 (Yes), the internal resistance measurement process of the battery is performed by the processes after ST4.
【００３２】ＳＴ４の処理において電池の内部抵抗測定
処理が開始されると、ＳＴ５の処理では、まず制御回路
１１は、制御回路１１以外のすべての周辺負荷９〜９ｎ
の動作を停止させる（以下、この状態を無負荷状態と称
す）ために、電子スイッチ１０〜１０ｎをオフさせる。
次に、このときの電池電圧を測定するため、電子スイッ
チ６を制御して電池電圧検出回路５を動作させる。ここ
で電池電圧検出回路５からのアナログ情報は、制御回路
１１のＡ／Ｄ変換器１１ａに入力され、ディジタル情報
に処理される。この無負荷状態の電池電圧を測定値Ａと
してメモリ１２に一時記憶する。In the process of ST4, when the process of measuring the internal resistance of the battery is started, in the process of ST5, first, the control circuit 11 transmits all the peripheral loads 9 to 9n other than the control circuit 11.
In order to stop the operation (hereinafter, this state is referred to as a no-load state), the electronic switches 10 to 10n are turned off.
Next, in order to measure the battery voltage at this time, the electronic switch 6 is controlled to operate the battery voltage detection circuit 5. Here, the analog information from the battery voltage detection circuit 5 is input to the A / D converter 11a of the control circuit 11, and is processed into digital information. The battery voltage in the no-load state is temporarily stored in the memory 12 as the measured value A.
【００３３】ＳＴ６の処理において、２次電池１の内部
保護回路２および内部抵抗３からなる２次電池１全体の
内部抵抗ｒを測定するために、まず電子スイッチ８を制
御し、一定時間、定電流負荷回路７を動作させる（以
下、この状態を電池内部抵抗測定状態と称す）。次に、
このときの電池電圧を測定するために、電子スイッチ６
を制御して電池電圧検出回路５を動作させ、制御回路１
１のＡ／Ｄ変換器１１ａによりＡ／Ｄ変換処理をし、電
池内部抵抗測定状態の電池電圧を測定値Ｂとしてメモリ
１２に一時記憶する。In the process of ST6, in order to measure the internal resistance r of the entire secondary battery 1 including the internal protection circuit 2 and the internal resistance 3 of the secondary battery 1, first, the electronic switch 8 is controlled, and a constant time is set. The current load circuit 7 is operated (hereinafter, this state is referred to as a battery internal resistance measurement state). next,
To measure the battery voltage at this time, an electronic switch 6
To operate the battery voltage detection circuit 5 and control circuit 1
A / D conversion processing is performed by the first A / D converter 11a, and the battery voltage in the battery internal resistance measurement state is temporarily stored in the memory 12 as the measured value B.
【００３４】ＳＴ７の判断処理において、測定値Ａおよ
び測定値Ｂが常温状態における測定値であるかを判断す
る。ここで制御回路１１は２次電池１の周囲温度を検出
するため電子スイッチ６を制御し、温度検出素子４から
の温度情報を検出し、常温しきい値と比較する。この比
較にて常温以外と判断した場合(No)は、ＳＴ８の処理に
より、予めメモリ１２に記憶している図４（ｂ）の温度
対応データをもとに測定値Ａおよび測定値Ｂに温度補正
を加える。またＳＴ７の判断処理にて、常温と判断した
場合(Yes)は、特に補正を加えずＳＴ９の処理に移行す
る。In the determination process of ST7, it is determined whether the measured value A and the measured value B are the measured values in the normal temperature state. Here, the control circuit 11 controls the electronic switch 6 to detect the ambient temperature of the secondary battery 1, detects the temperature information from the temperature detecting element 4, and compares it with the normal temperature threshold value. If it is determined that the temperature is other than the normal temperature (No), the process proceeds to ST8, where the measured values A and B are stored in the memory 12 in advance based on the temperature corresponding data shown in FIG. Make corrections. If it is determined in step ST7 that the room temperature is normal (Yes), the process proceeds to step ST9 without any particular correction.
【００３５】ＳＴ９の処理において、測定値Ａ（温度補
正も加味した無負荷状態時の測定値）から測定値Ｂ（温
度補正も加味した電池内部抵抗測定状態時の測定値）を
差し引くことにより、内部抵抗ｒにおける電圧降下分Δ
Ｖを求める。次に、電池の内部抵抗ｒを算出するため
に、定電流負荷回路７を動作させたときの負荷電流Ｉ
［ｍＡ］と前記電圧降下分ΔＶ［Ｖ］から、オームの法
則により内部抵抗ｒを求め、この算出結果を内部抵抗ｒ
としてメモリ１２に一時記憶する（例えば、定電流負荷
回路の負荷電流を１００ｍＡと設定し、電圧降下分を
０．０５Ｖと仮定すると、オームの法則Ｒ＝Ｖ／Ｉより
内部抵抗値０．５Ωが求められる）。In the process of ST9, by subtracting the measured value B (measured value in the battery internal resistance measuring state also including the temperature correction) from the measured value A (measured value in the no-load state including the temperature correction), Voltage drop Δ at internal resistance r
Find V. Next, in order to calculate the internal resistance r of the battery, the load current I when the constant current load circuit 7 is operated is calculated.
From [mA] and the voltage drop ΔV [V], an internal resistance r is obtained according to Ohm's law, and the calculation result is expressed as the internal resistance r
(For example, assuming that the load current of the constant current load circuit is set to 100 mA and the voltage drop is 0.05 V, the internal resistance value of 0.5Ω is obtained from Ohm's law R = V / I). Desired).
【００３６】ＳＴ１０の判断処理において、制御回路１
１がＳＴ９の処理にて算出した内部抵抗ｒと、予めメモ
リ１２に記憶している図４（ｃ）の内部抵抗対応データ
をもとに電池正常時の内部抵抗（正常値）、ならびに電
池寿命時の内部抵抗（寿命値）と比較、判断する処理を
行い、装着されている電池の内部抵抗ｒから電池寿命の
度合いを把握することができる。ここで算出値の内部抵
抗ｒが寿命値を上回った場合(No)は、ＳＴ１１の処理に
て電池交換を促す特殊音をスピーカ１４に出力するとも
に表示部１３に対しても電池交換を促す表示を行わせ
る。In the determination process of ST10, the control circuit 1
1 is an internal resistance (normal value) when the battery is normal, and a battery life based on the internal resistance r calculated in the process of ST9 and the internal resistance correspondence data of FIG. A process of comparing and determining the internal resistance (life value) at the time is performed, and the degree of battery life can be grasped from the internal resistance r of the mounted battery. Here, when the calculated internal resistance r exceeds the life value (No), a special sound prompting battery replacement is output to the speaker 14 in the process of ST11 and a display prompting the battery replacement is also displayed on the display unit 13. Is performed.
【００３７】ＳＴ１２の判断処理において、ＳＴ２での
割込み要因が、ユーザ操作による割込みと判断した場合
(Yes)は、ＳＴ１３の処理にて一定時間、現状の電池寿
命のレベルを表示部１３に対し出力した後、ＳＴ１４の
処理に移行して電池残容量表示処理を行ってＳＴ１５の
通常動作へ移行し、割込み要因を検出するまで再度監視
を続けるためにＳＴ２の処理に移行する。In the determination process of ST12, when the interrupt factor in ST2 is determined to be an interrupt by a user operation
(Yes) indicates that the current battery life level is output to the display unit 13 for a certain period of time in the process of ST13, and then the process proceeds to the process of ST14 to perform the remaining battery capacity display process and proceeds to the normal operation of ST15. Then, the process shifts to the process of ST2 in order to continue monitoring again until an interrupt factor is detected.
【００３８】また、ＳＴ１２の判断処理において、割込
みの要因が、ユーザ操作による割込みでないと判断した
場合(No)は、ＳＴ１４の処理に移行して電池残容量表示
処理を行ってＳＴ１５の通常動作へ移行し、割込み要因
を検出するまで再度監視を続けるためにＳＴ２の処理に
移行する。If it is determined in step ST12 that the cause of the interrupt is not an interrupt by a user operation (No), the process proceeds to step ST14 to perform a remaining battery capacity display process, and returns to the normal operation of step ST15. The process proceeds to step ST2 to continue monitoring again until an interrupt factor is detected.
【００３９】以上のように、本発明の第１実施形態によ
れば、経年劣化による２次電池の内部抵抗変化を検出す
ることにより、電池の寿命を判断することができるた
め、電池寿命による電池交換の時期をユーザに促すこと
を可能とした電池寿命検出機能を有した電池残容量表示
方法および表示装置を提供することができる。As described above, according to the first embodiment of the present invention, the life of the secondary battery can be determined by detecting the change in internal resistance of the secondary battery due to aging. It is possible to provide a battery remaining capacity display method and a display device having a battery life detecting function capable of prompting a user to replace the battery.
【００４０】次に、本発明の第２実施形態について図
１，図３，図４を用いて説明する。Next, a second embodiment of the present invention will be described with reference to FIGS.
【００４１】図３は本発明に係る電池残容量表示方法の
第２実施形態における処理手順を示すフローチャートで
ある。FIG. 3 is a flowchart showing a processing procedure in the second embodiment of the battery remaining capacity display method according to the present invention.
【００４２】まず、図３に示すＳＴ２１の処理におい
て、装置の電源が、キー入力あるいはスイッチあるいは
タイマなどの何らかの電源投入手段によりオンされるこ
とにより、ＳＴ２２の電池残容量測定割込み検出処理に
移行する。この割込み検出処理の要因としては、ＳＴ２
２の処理による電源投入のとき、あるいはユーザ設定割
込み（ユーザの要求があるときのみ処理を行う割込
み）、あるいはタイマー割込み（電池残容量検出タイマ
により一定周期毎に検出する割込み）、あるいは充電・
非充電の状態検出の割込み等がある。First, in the process of ST21 shown in FIG. 3, when the power supply of the apparatus is turned on by a key input or some power-on means such as a switch or a timer, the process proceeds to the battery remaining capacity measurement interrupt detection process of ST22. . The cause of this interrupt detection processing is ST2
2. When the power is turned on by the processing of step 2, or a user setting interrupt (interrupt that performs processing only when there is a user request), a timer interrupt (interrupt detected at regular intervals by the battery remaining capacity detection timer), or charging / charging
There is an interruption of non-charging state detection and the like.
【００４３】ＳＴ２２の処理において、割込みを検出し
た場合、ＳＴ２３の判断処理に移行し、図１に示す制御
回路１１にて、充電検出回路１５からの検出結果によっ
て装置が充電中か否かを判断する。If an interrupt is detected in the process of ST22, the process proceeds to the determination process of ST23, and the control circuit 11 shown in FIG. 1 determines whether or not the device is being charged based on the detection result from the charge detection circuit 15. I do.
【００４４】ＳＴ２３の判断処理において、充電中と判
断した場合（No）は、ＳＴ３４の通常動作に移行し、割
込み要因を検出するまで再度監視を続けるため、ＳＴ２
２の処理に移行する。またＳＴ２３の判断処理におい
て、非充電と判断した場合（Yes）は、ＳＴ２４以降の
処理により電池残容量表示処理を行う。In the determination process of ST23, when it is determined that charging is being performed (No), the process proceeds to the normal operation of ST34, and monitoring is continued again until an interrupt factor is detected.
The process moves to the process of No. 2. If it is determined that the battery is not charged in the determination process of ST23 (Yes), the remaining battery capacity display process is performed by the processes of ST24 and thereafter.
【００４５】ＳＴ２４の処理において、電池残容量表示
処理が開始されると、ＳＴ２５の処理では、制御回路１
１は装置動作時の周辺負荷９〜９ｎの動作状態を把握
し、負荷電流値の概算を行う。In the process of ST24, when the battery remaining capacity display process is started, in the process of ST25, the control circuit 1
1 grasps the operation state of the peripheral loads 9 to 9n during the operation of the device and estimates the load current value.
【００４６】ＳＴ２６の処理において、制御回路１１
は、周辺負荷９〜９ｎの動作状態時の電池電圧を測定す
るために、電子スイッチ６を制御して電池電圧検出回路
５を動作させる。ここで電池電圧検出回路５からのアナ
ログ情報は、制御回路１１のＡ／Ｄ変換器１１ａに入力
されてディジタル情報に処理される。そのときの電池電
圧をメモリ１２に一時記憶する。In the process of ST26, the control circuit 11
Controls the electronic switch 6 to operate the battery voltage detection circuit 5 in order to measure the battery voltage when the peripheral loads 9 to 9n are operating. Here, the analog information from the battery voltage detection circuit 5 is input to the A / D converter 11a of the control circuit 11 and processed into digital information. The battery voltage at that time is temporarily stored in the memory 12.
【００４７】ＳＴ２７の判断処理において、常温状態で
あるかを判断するため、ＳＴ２６の処理にて電池電圧を
測定した後、制御回路１１は、温度検出素子４からの温
度情報を検出して常温しきい値と比較する。この比較の
結果、常温以外と判断した場合(No)は、ＳＴ２８の処理
により、予めメモリ１２に記憶している図４（ｂ）に示
す温度対応データをもとにＳＴ２６の処理において測定
した電池電圧値に温度補正を加える。In the determination process of ST27, after determining the battery voltage in the process of ST26, the control circuit 11 detects the temperature information from the temperature detecting element 4 to determine whether the temperature is normal, in order to determine whether the temperature is normal. Compare with threshold. As a result of this comparison, when it is determined that the temperature is other than the normal temperature (No), the battery measured in the process of ST26 based on the temperature corresponding data shown in FIG. Apply temperature correction to the voltage value.
【００４８】ＳＴ２９の処理において、ＳＴ２７の判断
処理にて常温であると判断した場合（Yes）の電池電圧
値、またはＳＴ２８の処理にて温度補正を加味した電池
電圧値と、ＳＴ２５の処理において概算した装置の負荷
電流値から、予めメモリ１２に記憶している図４（ａ）
に示す負荷電流対応データをもとに電池残容量を算出す
る。In the processing of ST29, the battery voltage value when it is determined that the temperature is normal (Yes) in the determination processing of ST27, or the battery voltage value in consideration of the temperature correction in the processing of ST28, and the approximate value in the processing of ST25. FIG. 4A previously stored in the memory 12 based on the load current value of the device obtained.
The remaining battery capacity is calculated based on the load current corresponding data shown in FIG.
【００４９】ＳＴ３０の処理において、第１実施形態の
図２に示す処理フローと同様にしてメモリ１２に一時記
憶した電池の内部抵抗ｒから、予めメモリ１２に記憶し
ている図４（ｃ）に示す内部抵抗対応データをもとに、
ＳＴ２９の処理にて補正した電池残容量に対し、さらに
補正を加える。In the process of ST30, the internal resistance r of the battery temporarily stored in the memory 12 is used in the same manner as the process flow shown in FIG. 2 of the first embodiment. Based on the internal resistance data shown
The remaining battery capacity corrected in the process of ST29 is further corrected.
【００５０】以上のフローにより、予めメモリ１２に記
憶してある図４（ａ），（ｂ），（ｃ）に示す電池の温
度対応データ，負荷電流対応データ，内部抵抗対応デー
タをもとに電池残容量を補正した最終的な電池残容量が
得られる。According to the above flow, based on the battery temperature correspondence data, load current correspondence data and internal resistance correspondence data shown in FIGS. 4 (a), (b) and (c) stored in the memory 12 in advance. The final remaining battery capacity obtained by correcting the remaining battery capacity is obtained.
【００５１】ＳＴ３１の判断処理において、ＳＴ２２に
おける割込み要因が、ユーザ操作による割込みと判断し
た場合(Yes)は、ＳＴ３３の処理において、一定時間、
現状の電池残容量を表示部１３に対し出力した後、ＳＴ
３４の通常動作へ移行し、割込み要因を検出するまで再
度監視を続けるため、ＳＴ１７の処理に移行する。In the determination process of ST31, when it is determined that the interrupt factor in ST22 is an interrupt by a user operation (Yes), in the process of ST33, a predetermined time is set.
After outputting the current remaining battery level to the display unit 13, the ST
The operation shifts to the normal operation of S34, and the monitoring is continued again until an interrupt factor is detected.
【００５２】また、ＳＴ３１の判断処理において、割込
み要因が、ユーザ操作による割込みでないと判断した場
合(No)は、ＳＴ２７の処理にて、表示部１３に対してリ
アルタイムに表示している電池残容量表示の更新を行っ
た後に、ＳＴ３４の通常動作へ移行し、割込み要因を検
出するまで再度監視を続けるためにＳＴ２２の処理に移
行する。If it is determined in the determination process of ST31 that the interrupt factor is not an interrupt by a user operation (No), the remaining battery capacity displayed in real time on the display unit 13 in the process of ST27. After updating the display, the process shifts to the normal operation of ST34, and shifts to the process of ST22 to continue monitoring again until an interrupt factor is detected.
【００５３】以上のように本発明の第２実施形態によれ
ば、温度変化あるいは負荷変動、さらには電池の経年劣
化に対する電池状態の各情報を、メモリ１２に記憶して
ある各対応データと比較し、補正することにより、正確
に電池残容量の表示をすることができる。As described above, according to the second embodiment of the present invention, each information of the battery state with respect to the temperature change or the load change and the aging deterioration of the battery is compared with each corresponding data stored in the memory 12. Then, by performing the correction, the remaining battery capacity can be accurately displayed.
【００５４】なお、前記第１実施形態および第２実施形
態では、リチウムイオン２次電池に代表されるように、
放電時において電池電圧が時間に比例して一定レベルで
降下していくような特性を有する充電式および非充電式
の電池であれば適用することができ、前記と同様な効果
を得ることができる。In the first and second embodiments, as represented by a lithium ion secondary battery,
Rechargeable and non-rechargeable batteries having characteristics such that the battery voltage drops at a constant level in proportion to time during discharging can be applied, and the same effects as described above can be obtained. .
【００５５】[0055]
【発明の効果】以上のように本発明によれば、経年劣化
による２次電池の内部抵抗変化を検出することにより、
電池の寿命を適正に判断することができるため、電池寿
命による電池交換の時期をより正確に使用者に促すこと
ができ、さらに温度変化，負荷変動，電池の経年劣化に
対する電池状態を、予めメモリに記憶してある各対応デ
ータと比較し、補正することにより、電池残容量の表示
をさらに正確に行うことができる電池残容量表示方法お
よび電池残容量表示装置を提供することができる。As described above, according to the present invention, by detecting a change in internal resistance of a secondary battery due to aging,
Since the battery life can be properly judged, the user can be more accurately prompted to replace the battery due to the battery life. In addition, the battery state with respect to temperature changes, load fluctuations, and aging of the battery is stored in a memory in advance. The present invention can provide a remaining battery capacity display method and a remaining battery capacity display device that can display the remaining battery capacity more accurately by comparing the data with the corresponding data stored in the storage device.
【図１】本発明の電池残容量表示装置の一実施形態にお
ける構成を示すブロック図FIG. 1 is a block diagram showing a configuration of a battery remaining capacity display device according to an embodiment of the present invention.
【図２】図１の電池残容量表示装置における本発明に係
る電池残容量表示方法の第１実施形態における経年劣化
による電池寿命判断に係るフローチャートFIG. 2 is a flowchart for determining a battery life due to aged deterioration in a first embodiment of a battery remaining capacity display method according to the present invention in the battery remaining capacity display device of FIG. 1;
【図３】図１の電池残容量表示装置における本発明に係
る電池残容量表示方法の第２実施形態における経年劣化
による電池寿命判断に係るフローチャートFIG. 3 is a flowchart for determining a battery life due to aging in a second embodiment of the battery remaining capacity display method according to the present invention in the battery remaining capacity display device of FIG. 1;
【図４】第１実施形態と第２実施形態におけるメモリに
記憶してある各対応データを示す図であり、（ａ）は負
荷電流対応データを示す図、（ｂ）は温度対応データを
示す図、（ｃ）は内部抵抗対応データを示す図FIGS. 4A and 4B are diagrams showing respective correspondence data stored in memories in the first embodiment and the second embodiment, wherein FIG. 4A shows load current correspondence data, and FIG. 4B shows temperature correspondence data. FIG. 3C is a diagram showing internal resistance correspondence data.
【図５】従来の２次電池の電池残量表示装置の構成を示
すブロック図FIG. 5 is a block diagram showing a configuration of a conventional battery level display device for a secondary battery.
１ ２次電池 ２ 保護回路 ３ 内部抵抗 ４ 温度検出素子 ５ 電池電圧検出回路 ６ 電子スイッチ ７ 定電流負荷回路 ８ 電子スイッチ ９〜９ｎ 負荷 １０〜１０ｎ 電子スイッチ １１ 制御回路 １１ａ Ａ／Ｄ変換器 １２ メモリ １３ 表示部 １４ スピーカ １５ 充電検出回路 DESCRIPTION OF SYMBOLS 1 Secondary battery 2 Protection circuit 3 Internal resistance 4 Temperature detection element 5 Battery voltage detection circuit 6 Electronic switch 7 Constant current load circuit 8 Electronic switch 9-9n Load 10-10n Electronic switch 11 Control circuit 11a A / D converter 12 Memory 13 display section 14 speaker 15 charge detection circuit
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2G016 CA00 CB05 CB06 CB11 CB12 CB13 CB21 CC01 CC02 CC04 CC06 CC07 CC10 CC12 CC13 CC16 CC27 CC28 CD01 CE00 CE07 CE08 5G003 CA11 CA20 CB01 EA05 EA08 GC05 5H030 AA08 AS20 FF27 FF41 FF44 FF51 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2G016 CA00 CB05 CB06 CB11 CB12 CB13 CB21 CC01 CC02 CC04 CC06 CC07 CC10 CC12 CC13 CC16 CC27 CC28 CD01 CE00 CE07 CE08 5G003 CA11 CA20 CB01 EA05 EA08 GC05 5H030 AA08 AS20 FF44 FF51FF
Claims (12)
電池周囲温度情報との３つの情報を検出し、予めメモリ
に記憶してある電池寿命による内部抵抗対応データと、
温度変化による温度対応データとを読み出し、前記電池
内部抵抗情報，電池電圧情報，電池周囲温度情報および
前記内部抵抗対応データ，温度対応データを比較、補正
することにより、周囲の温度変化を考慮した電池の内部
抵抗値を検出して電池の寿命を判断し、その判断結果に
基づいて電池残容量の表示を行うことを特徴とした電池
残容量表示方法。1. Battery internal resistance information, battery voltage information,
Detecting three pieces of information including battery ambient temperature information, and internal resistance correspondence data based on battery life stored in a memory in advance;
A battery that takes into account ambient temperature changes by reading temperature-corresponding data due to temperature changes and comparing and correcting the battery internal resistance information, battery voltage information, battery ambient temperature information, and the internal resistance-corresponding data and temperature-corresponding data. Characterized by detecting the internal resistance of the battery and determining the life of the battery, and displaying the remaining battery capacity based on the result of the determination.
電池周囲温度情報と、装置の負荷回路による負荷電流情
報とを検出し、予めメモリに記憶してある電池寿命によ
る内部抵抗対応データと、温度変化による温度対応デー
タと、負荷変動による負荷電流対応データとを読み出
し、前記電池内部抵抗情報，電池電圧情報，電池周囲温
度情報，負荷電流情報および前記内部抵抗対応データ，
温度対応データ，負荷電流対応データを比較、補正する
ことにより、電池の経年劣化による容量変化、あるいは
周囲の温度変化、あるいは負荷変動を考慮して電池の寿
命を判断し、その判断結果に基づいて電池残容量の表示
を行うことを特徴とする電池残容量表示方法。2. Battery internal resistance information, battery voltage information,
Detects battery ambient temperature information and load current information from the load circuit of the device, and stores internal resistance correspondence data based on battery life, temperature correspondence data based on temperature changes, and load current correspondence data based on load fluctuations stored in memory in advance. And read out the battery internal resistance information, battery voltage information, battery ambient temperature information, load current information and the internal resistance corresponding data,
By comparing and correcting the data corresponding to temperature and the data corresponding to load current, the life of the battery is judged in consideration of the change in capacity due to the aging of the battery, the change in ambient temperature, or the change in load, and based on the judgment result, A method for displaying a remaining battery charge, comprising displaying a remaining battery charge.
作させ、そのときの負荷電流および電圧降下により、オ
ームの法則から内部抵抗を算出し、予めメモリに記憶し
てある電池正常時の内部抵抗値と電池寿命時の内部抵抗
値とから電池の寿命レベルを判断することを特徴とする
請求項１または２記載の電池残容量表示方法。3. A detection circuit for detecting the internal resistance of the battery is operated, the internal resistance is calculated from Ohm's law based on the load current and the voltage drop at that time, and the internal resistance when the battery is normal stored in the memory in advance is calculated. 3. The battery remaining capacity display method according to claim 1, wherein the battery life level is determined from the resistance value and the internal resistance value during the life of the battery.
作するたびに内部抵抗の算出結果をメモリに更新して記
憶し、この算出結果を電池残容量表示の際に参照するこ
とにより、電池寿命を考慮した電池残容量の補正を行う
ことを特徴とする請求項１または２記載の電池残容量表
示方法。4. Whenever a detection circuit for detecting the internal resistance of a battery operates, the calculation result of the internal resistance is updated and stored in a memory, and the calculation result is referred to when the remaining battery capacity is displayed. 3. The method according to claim 1, wherein the remaining battery capacity is corrected in consideration of the service life.
は電源が投入されたとき、または予め定められた期間が
満了したとき等、何らかの割込み要因が発生したときに
検出回路を動作させることを特徴とする請求項３または
４記載の電池残容量表示方法。5. The detection circuit is operated when a battery causes any interruption, such as when a battery is attached or detached or replaced, when power is turned on, or when a predetermined period has expired. The battery remaining capacity display method according to claim 3 or 4, wherein:
断したときは、表示部に電池交換表示を行うとともに、
電池交換を促す特殊音を発生させることを特徴とする請
求項１〜５のいずれか１項記載の電池残容量表示方法。6. When it is determined that the battery has reached the end of its life due to an increase in internal resistance of the battery, a battery replacement display is displayed on the display unit,
The method according to any one of claims 1 to 5, wherein a special sound for prompting battery replacement is generated.
検出する定電流負荷回路と、電池電圧情報としての電池
の電圧を検出する電池電圧検出回路と、温度情報として
の電池の周囲温度を検出する温度検出素子と、電池寿命
による内部抵抗対応データおよび温度変化による温度対
応データとが予め記録されたメモリと、前記電池内部抵
抗情報，電池電圧情報，温度情報および前記内部抵抗対
応データ，温度対応データを入力して比較、補正するこ
とにより、周囲の温度変化を考慮した電池の内部抵抗値
を検出して電池の寿命を判断し、その判断結果に基づい
て電池残容量の表示を行わせる制御回路とを備えたこと
を特徴とする電池残容量表示装置。7. A constant current load circuit for detecting battery life as battery internal resistance information, a battery voltage detection circuit for detecting battery voltage as battery voltage information, and detecting a battery ambient temperature as temperature information. A temperature detecting element, a memory in which data corresponding to internal resistance due to battery life and data corresponding to temperature due to temperature change are recorded in advance, the battery internal resistance information, battery voltage information, temperature information and the internal resistance corresponding data, Input, compare, and correct data to detect battery internal resistance considering ambient temperature changes, determine battery life, and display remaining battery capacity based on the determination. A battery remaining capacity display device comprising a circuit.
内部抵抗情報としての電池の寿命を検出する定電流負荷
回路と、電池電圧情報としての電池の電圧を検出する電
池電圧検出回路と、温度情報としての電池の周囲温度を
検出する温度検出素子と、電池寿命による内部抵抗対応
データおよび温度変化による温度対応データおよび負荷
変動による負荷電流対応データとが予め記録されたメモ
リと、前記電池内部抵抗情報，電池電圧情報，温度情
報，前記装置の負荷回路からの負荷電流情報および前記
内部抵抗対応データ，温度対応データ，負荷電流対応デ
ータを入力して、電池の経年劣化による容量変化、ある
いは周囲の温度変化、あるいは負荷変動を考慮して電池
の寿命を判断し、その判断結果に基づいて電池残容量の
表示を行わせる制御回路とを備えたことを特徴とする電
池残容量表示装置。8. A load circuit provided in the device, a constant current load circuit for detecting battery life as battery internal resistance information, a battery voltage detection circuit for detecting battery voltage as battery voltage information, A temperature detecting element for detecting an ambient temperature of the battery as temperature information; a memory in which data corresponding to internal resistance based on battery life, data corresponding to temperature due to temperature change, and data corresponding to load current due to load variation are stored in advance; Input resistance information, battery voltage information, temperature information, load current information from the load circuit of the device and the internal resistance corresponding data, temperature corresponding data, and load current corresponding data to change the capacity due to aging of the battery A control circuit that determines the life of the battery in consideration of the temperature change or load fluctuation of the battery and displays the remaining battery capacity based on the determination result. A battery remaining capacity display device comprising:
に、電池の内部抵抗を測定する定電流負荷回路を動作さ
せたときの負荷電流とそのときの電圧降下により、オー
ムの法則から内部抵抗を算出し、予めメモリに記憶して
ある電池正常時の内部抵抗値と電池寿命時の内部抵抗値
とから電池の寿命レベルを判断する構成であることを特
徴とする請求項７または８記載の電池残容量表示装置。9. The control circuit operates according to Ohm's law based on the load current and the voltage drop when operating a constant current load circuit for measuring the internal resistance of the battery in order to detect the life of the battery. 9. The battery according to claim 7, wherein a resistance is calculated, and a life level of the battery is determined from an internal resistance value when the battery is normal and an internal resistance value during the life of the battery stored in a memory in advance. Battery remaining capacity display device.
するたびに内部抵抗の算出結果をメモリに更新、記憶
し、制御回路が電池残容量表示の際に前記算出結果を参
照することにより、電池寿命を考慮した電池残容量の補
正を行う構成であることを特徴とする請求項７または８
記載の電池残容量表示装置。10. A calculation result of an internal resistance is updated and stored in the memory every time the constant current load circuit operates on the memory, and the control circuit refers to the calculation result when displaying the remaining battery capacity, 9. A configuration in which the remaining battery capacity is corrected in consideration of the battery life.
The battery remaining capacity display device according to the above.
は交換される際、または電源が投入されたとき、または
予め定められた期間が満了したとき等、何らかの割込み
要因が発生したときに動作する構成であることを特徴と
する請求項７〜１０のいずれか１項記載の電池残容量表
示装置。11. The constant current load circuit operates when a battery causes a certain interrupt factor, such as when a battery is attached or detached or replaced, when power is turned on, or when a predetermined period has expired. The battery remaining capacity display device according to any one of claims 7 to 10, wherein the device has a configuration.
判断したときに、表示部に電池交換表示を行うととも
に、電池交換を促す特殊音を発生させる報知手段を備え
たことを特徴とする請求項７〜１１のいずれか１項記載
の電池残容量表示装置。12. When the internal resistance of the battery is increased and it is determined that the battery has reached the end of its life, the display unit displays a battery replacement indication and has a notifying means for generating a special sound prompting the user to replace the battery. A battery remaining capacity display device according to any one of claims 7 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10177484A JP2000012104A (en) | 1998-06-24 | 1998-06-24 | Method and device for displaying residual capacity of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10177484A JP2000012104A (en) | 1998-06-24 | 1998-06-24 | Method and device for displaying residual capacity of battery |
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| JP2000012104A true JP2000012104A (en) | 2000-01-14 |
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| JP10177484A Pending JP2000012104A (en) | 1998-06-24 | 1998-06-24 | Method and device for displaying residual capacity of battery |
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| JP2002236156A (en) * | 2000-12-05 | 2002-08-23 | Yazaki Corp | Deterioration degree determination method and device of battery for vehicle |
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