JP2539330Y2 - Battery level display - Google Patents
Battery level displayInfo
- Publication number
- JP2539330Y2 JP2539330Y2 JP1989120387U JP12038789U JP2539330Y2 JP 2539330 Y2 JP2539330 Y2 JP 2539330Y2 JP 1989120387 U JP1989120387 U JP 1989120387U JP 12038789 U JP12038789 U JP 12038789U JP 2539330 Y2 JP2539330 Y2 JP 2539330Y2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- voltage
- temperature
- reference voltage
- display device
- 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.)
- Expired - Lifetime
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- Measurement Of Current Or Voltage (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案はリチューム電池等の二次電池に用いて好適な
電池の残量表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to a battery remaining amount display device suitable for use in a secondary battery such as a lithium battery.
本考案はリチューム電池等の二次電池に用いて好適な
電池の残量表示装置に関し、放電によって放電電圧が降
下し、温度の上昇によって容量が増加する電池と、電池
の電圧と、この電池の電圧を分圧抵抗で分圧した基準電
圧とを比較する複数の比較手段と、該複数の比較手段の
出力信号により上記電池の残量を表示する複数の発光素
子より成る表示手段とを有する電池の残量表示装置に於
いて、複数の比較手段の基準側端子に接続した複数の基
準電圧設定抵抗素子の抵抗温度特性に対して負の電圧温
度特性を有する１つの温度補償素子を上記分圧抵抗と接
地間に直列に接続し、複数の基準電圧設定抵抗素子の共
通接続点を分圧抵抗と温度補償素子の直列接続中点に接
続して、基準電圧を常温時より降下させて、上記電池が
温度上昇により容量増加したとき温度補償を行なて容量
増加に見合った残存稼動時間を表示装置に表示するよう
にしたものである。The present invention relates to a battery remaining amount display device suitable for use in a secondary battery such as a lithium battery, and relates to a battery whose discharge voltage drops due to discharge and whose capacity increases due to temperature rise, a battery voltage, and a battery voltage. A battery comprising: a plurality of comparing means for comparing a voltage with a reference voltage obtained by dividing a voltage by a voltage dividing resistor; and a display means comprising a plurality of light emitting elements for displaying a remaining amount of the battery based on output signals of the plurality of comparing means. In the remaining amount display device, one temperature compensating element having a negative voltage-temperature characteristic with respect to the resistance temperature characteristic of the plurality of reference voltage setting resistance elements connected to the reference side terminals of the plurality of comparing means is connected to the voltage dividing device. Connect in series between the resistor and ground, connect the common connection point of the multiple reference voltage setting resistor elements to the midpoint of the series connection of the voltage dividing resistor and the temperature compensation element, and lower the reference voltage from room temperature. Battery capacity due to temperature rise And row temperature compensation when pressurized is obtained so as to display on the display device the residual operating time commensurate with the increase in capacity.
近年、小型携帯用電子機器の発達に伴いラジオ、テー
プレコーダ、ポータブルVTR等で多くの二次電池が利用
されている。この様な二次電池の使用状態に於いて、そ
の残存容量を複数のLEDの点灯で表示する様にしたもの
を本出願人は先に特開平１−100479号公報によって提案
した。この公報に開示された電池の残量表示装置の大要
を第３図について説明する。In recent years, with the development of small portable electronic devices, many secondary batteries have been used in radios, tape recorders, portable VTRs, and the like. The applicant of the present invention has previously proposed in Japanese Patent Application Laid-Open No. 1-100479 a display in which the remaining capacity is displayed by lighting a plurality of LEDs in such a state of use of the secondary battery. The outline of the battery remaining amount display device disclosed in this publication will be described with reference to FIG.
第３図に於いて（１）は電池を示し、電池（１）は例
えば、リチユム電池の様に二次電池であり、リチユム電
池は負極にリチユムを、正極にLiMn2O4等を使用したも
ので放電に応じて放電電圧が降下する放電特性を有する
と共に温度上昇によって容量が増加する特性を持ってい
る。この電池（１）は図示しないが、携帯用の電子機器
（以下負荷と記す）に接続されると共に、第３図に示す
電池の残量表示回路に接続されている。この電池（１）
の正極を可変抵抗器（２）を介して接地し、この可変抵
抗器（２）の摺動子（2a）を比較回路（5a）（5b）（5
c）を構成する差動増幅回路の非反転端子に夫々接続す
る。又、電池（１）の正極を夫々の比較回路（5a）（5
b）（5c）の反転入力端子に抵抗器（3a）（3b）及び（3
c）を介して接続する。これら比較回路（5a）（5b）及
び（5c）の反転入力端子を夫々抵抗器（4a）（4b）及び
（4c）を介して夫々接地する。この場合抵抗器（3a）及
び（4a）と、（3b）及び（4b）並に（3c）及び（4c）は
比較回路（5a）（5b）及び（5c）の夫々の反転入力端
子、即ち基準入力端子に供給する基準電圧を決定する抵
抗器であり、後述する検知点に応じて、その値が定めら
れる。電池（１）の可変抵抗器（２）の摺動子（2a）か
ら得られる電圧と抵抗器（3a）及び（4a）と（3b）及び
（4b）並に（3c）及び（4c）で設定された基準電圧とが
比較回路（5a）（5b）及び（5c）で比較され、電池
（１）の基準電圧より高い場合に比較回路（5a）（5b）
及び（5c）の出力信号が出力される様に成されている。
この比較回路（5a）（5b）及び（5c）の出力端子を夫々
駆動用のNPN型トランジスタ（6a）（6b）及び（6c）の
ベースに接続し、このトランジスタ（6a）（6b）及び
（6c）の夫々のコレクタをLED（7a）（7b）及び（7c）
の夫々のカソードに接続し、このLED（7a）（7b）及び
（7c）の夫々のアノードを正の直流電圧が供給される電
源端子（８）に接続し、又、トランジスタ（6a）（6b）
及び（6c）の夫々のエミッタを接地する。この場合、NP
N型トランジスタ（6a）（6b）及び（6c）が“オン”し
たときはNPN型トランジスタ（6a）（6b）及び（6c）の
夫々のコレクタに接続されたLED（7a）（7b）及び（7
c）が発光する様に成す。この様な構成に於いて、例え
ば、第４図に示す様な電池（１）の稼動時間と放電電圧
を示す特性図の時、比較回路（5a）（5b）及び（5c）に
よって比較される３段階の検知点A1，A2，A3の検知電圧
をV1，V2，V3とし、夫々の残存稼動時間を0,60,120分と
すると、電池（１）の放電電圧が検知点A1より低い電圧
V1の時にはすべてのLED（7a）（7b）及び（7c）は消さ
れて発光されず、電池（１）の放電電圧が検知点A3より
高い電圧V3以上であれば全てのLED（7a）（7b）及び（7
c）は発光し、電池（１）の放電電圧が検知点A2の電圧V
2であればLED（7b）（7c）が発光する等でLEDの発光状
態で電池（１）の残存稼動時間を判断することが出来る
ように成されている。In FIG. 3, (1) indicates a battery, and the battery (1) is a secondary battery such as a lithium battery. The lithium battery uses lithium as a negative electrode and LiMn 2 O 4 as a positive electrode. It has a discharge characteristic in which the discharge voltage drops in accordance with the discharge, and also has a characteristic in which the capacity increases as the temperature rises. Although not shown, the battery (1) is connected to a portable electronic device (hereinafter, referred to as a load) and is connected to a battery remaining amount display circuit shown in FIG. This battery (1)
Is grounded via a variable resistor (2), and the slider (2a) of the variable resistor (2) is connected to a comparison circuit (5a) (5b) (5
c) to the non-inverting terminals of the differential amplifier circuit. The positive electrode of the battery (1) is connected to each of the comparison circuits (5a) (5a).
b) Connect the resistors (3a), (3b) and (3
c) Connect through. The inverting input terminals of these comparison circuits (5a), (5b) and (5c) are grounded via resistors (4a) (4b) and (4c), respectively. In this case, the resistors (3a) and (4a) and (3b) and (4b) as well as (3c) and (4c) are the inverting input terminals of the comparison circuits (5a), (5b) and (5c), respectively. The resistor determines a reference voltage to be supplied to the reference input terminal, and its value is determined according to a detection point described later. The voltage obtained from the slider (2a) of the variable resistor (2) of the battery (1) and the resistors (3a) and (4a) and (3b) and (4b) as well as (3c) and (4c) The set reference voltage is compared with the comparison circuits (5a), (5b) and (5c). If the reference voltage is higher than the reference voltage of the battery (1), the comparison circuits (5a) and (5b)
And (5c) are output.
The output terminals of the comparison circuits (5a), (5b) and (5c) are connected to the bases of NPN transistors (6a) (6b) and (6c) for driving, respectively, and the transistors (6a) (6b) and (6c) LED of each collector of 6c) (7a) (7b) and (7c)
The anodes of the LEDs (7a), (7b) and (7c) are connected to a power supply terminal (8) to which a positive DC voltage is supplied, and the transistors (6a) (6b )
And the respective emitters of (6c) are grounded. In this case, NP
When the N-type transistors (6a), (6b) and (6c) are turned on, the LEDs (7a) (7b) and (7b) connected to the respective collectors of the NPN transistors (6a) (6b) and (6c) 7
c) to emit light. In such a configuration, for example, in the case of the characteristic diagram showing the operation time and the discharge voltage of the battery (1) as shown in FIG. 4, the comparison is made by the comparison circuits (5a), (5b) and (5c). Assuming that the detection voltages of the three detection points A 1 , A 2 , and A 3 are V 1 , V 2 , and V 3, and the remaining operating time is 0,60,120 minutes, the discharge voltage of the battery (1) is the detection point. a voltage lower than the A 1
Of the time all LED V 1 (7a) (7b) and (7c) is not emitting is erased, the battery (1) discharge voltage of all if higher than the voltage V 3 or more than the detection point A 3 LED of ( 7a) (7b) and (7
c) emits light, voltage discharge voltage detection point A 2 of the battery (1) V
If it is 2 , the remaining operation time of the battery (1) can be determined based on the light emitting state of the LED, for example, by emitting light from the LEDs (7b) and (7c).
第３図及び第４図で説明した電池の残量稼動時間（残
存容量）の表示装置によれば、限られた容量の電池残量
或は使用量を推定出来るので非常に便利であるが、比較
回路（5a）（5b）及び（5c）の基準電圧入力端子に供給
される基準電圧は抵抗器（3a）（4a）と（3b）（4b）と
（3c）（4c）とで基準電圧設定が成されるために電池
（１）の温度が例えば、常温では常に一定の関係に保た
れている。所がリチユム等の二次電池では電池（１）の
配置されている周囲の温度が変化すると稼動時間も変化
し、例えば、温度が上昇すると電池（１）の容量は増加
し、残存稼動時間は増えるようになる。更に基準電圧も
変化し、増加するので例えば、第４図で検知点A2での放
電電圧V2時にはLED（7b）（7c）が点灯しているべきも
のが、LED（7c）だけが点灯する。この様に電池（１）
に温度変化があると実際の電池の残存稼動時間を表すこ
とが出来なくなる問題があった。According to the display device for the remaining battery operating time (remaining capacity) described in FIGS. 3 and 4, it is very convenient because the remaining battery capacity or usage of a limited capacity can be estimated. The reference voltage supplied to the reference voltage input terminals of the comparison circuits (5a), (5b) and (5c) is the reference voltage of the resistors (3a) (4a), (3b) (4b), (3c) and (4c). Since the setting is made, the temperature of the battery (1) is always kept constant at, for example, normal temperature. However, in a secondary battery such as a lithium battery, the operating time also changes when the temperature around the battery (1) is changed. For example, when the temperature rises, the capacity of the battery (1) increases, and the remaining operating time increases. It will increase. Further, since the reference voltage also changes, increasing for example, the discharge voltage V 2 times LED at the detection point A 2 in FIG. 4 (7b) (7c) is should is lit, only the LED (7c) lights I do. Battery (1) in this way
If there is a temperature change in the battery, there is a problem that the actual remaining operating time of the battery cannot be represented.
本考案は叙上の問題点を解決するために成されたもの
で、その目的とするところは電池の温度変化があっても
温度変化に対応し電池の残存稼動時間を正確に表示出来
る電池の残量表示装置を得ようとするものである。The present invention has been made in order to solve the above-mentioned problems. The purpose of the present invention is to provide a battery capable of accurately displaying the remaining operating time of a battery in response to the temperature change even when the battery temperature changes. It is intended to obtain a remaining amount display device.
本考案の電池の残量表示装置は、その例が第１図に示
されている様に放電によって放電電圧が降下し、温度の
上昇によって容量が増加する電池（１）と、この電池
（１）の電圧と、電池（１）の電圧を分圧抵抗（９）で
分圧した基準電圧とを比較する複数の比較手段（5a），
（5b），（5c）と、複数の比較手段（5a），（5b），
（5c）の出力信号により、電池（１）の残量を表示する
複数の発光素子（7a），（7b），（7c）より成る表示手
段（７）とを有する電池（１）の残量表示装置に於い
て、複数の比較手段（5a），（5b），（5c）の基準側端
子に接続した複数の基準電圧設定抵抗素子（3a），（4
a），（3b），（4b），（3c），（4c）の抵抗温度特性
に対して負の電圧温度特性を有する１つの温度補償素子
（10）を分圧抵抗（９）と接地間に直列に接続し、複数
の基準電圧設定抵抗素子（3a），（4a），（3b），（4
b），（3c），（4c）の共通接続点を分圧抵抗（９）と
温度補償素子（９）の直列接続中点に接続して、基準電
圧を常温時より降下させて、電池（１）が温度上昇によ
り容量増加したとき温度補償を行なって容量増加に見合
った残存稼動時間を表示装置（７）に表示させる様に成
したものである。As shown in FIG. 1, the battery remaining amount display device of the present invention has a battery (1) whose discharge voltage drops by discharging and whose capacity increases due to an increase in temperature, and a battery (1). ) And a reference voltage obtained by dividing the voltage of the battery (1) by a voltage dividing resistor (9).
(5b), (5c) and a plurality of comparison means (5a), (5b),
The display signal (7) including a plurality of light emitting elements (7a), (7b), and (7c) for displaying the remaining amount of the battery (1) according to the output signal of (5c). In the display device, a plurality of reference voltage setting resistance elements (3a), (4) connected to reference side terminals of a plurality of comparison means (5a), (5b), (5c).
a) A temperature compensating element (10) having a negative voltage-temperature characteristic with respect to the resistance-temperature characteristics of (3b), (4b), (3c), and (4c) is connected between the voltage-dividing resistor (9) and ground. Connected in series to the reference voltage setting resistor elements (3a), (4a), (3b), (4
b), (3c), and (4c) are connected to the midpoint of the series connection of the voltage-dividing resistor (9) and the temperature compensating element (9), and the reference voltage is reduced from that at room temperature. In the case of 1), when the capacity is increased due to the temperature rise, temperature compensation is performed so that the remaining operation time corresponding to the capacity increase is displayed on the display device (7).
本考案の電池の残量表示装置では比較回路（5a）（5
b）及び（5c）に供給する基準電圧を温度によって変化
させ、例えば、電池（１）の温度が上昇したときは基準
電圧を常温時より下げて常温時より低い電圧で表示手段
（７）を点灯させる様にしたので電池（１）の温度変化
に応じた表示を行うことが出来る。In the battery remaining amount display device of the present invention, the comparison circuit (5a) (5
The reference voltage supplied to b) and (5c) is changed depending on the temperature. For example, when the temperature of the battery (1) rises, the reference voltage is lowered from the normal temperature and the display means (7) is changed to a voltage lower than the normal temperature. Since the light is turned on, a display corresponding to a temperature change of the battery (1) can be performed.
以下、本考案の電池の残量表示装置の一実施例を第１
図の回路図及び第２図の残量特性図によって詳記する。Hereinafter, an embodiment of the battery remaining amount display device according to the present invention will be described as a first embodiment.
This will be described in detail with reference to the circuit diagram of FIG.
第１図で第３図との対応部分には同一符号を付して示
す。In FIG. 1, parts corresponding to those in FIG. 3 are denoted by the same reference numerals.
第１図で、電池（１）はリチユム電池の様に放電に応
じて放電電圧が降下する放電特性を有すると共に温度上
昇によって容量が増加する特性を持った例えば、定格電
圧8.5Vの二次電池である。In FIG. 1, a battery (1) has a discharge characteristic such that a discharge voltage decreases in accordance with discharge and a characteristic that a capacity increases with a rise in temperature, such as a lithium battery. It is.
この電池（１）は図示しないが、携帯用の負荷に接続
されると共に、第１図に示す電池の残量表示回路（７）
に接続されている。この電池（１）の正極を例えば10k
Ωの可変抵抗器（２）を介して接地し、この可変抵抗器
（２）の摺動子（2a）を比較回路（5a）（5b）（5c）を
構成する差動増幅回路の非反転端子に夫々接続する。又
電池の正極を180Ωの抵抗器（９）の一端に接続する。
この抵抗器（９）の他端をツェナーダイオード（10）の
陰極に接続し、その陽極は接地して直列回路を構成す
る。ツェナーダイオード（10）の陰極を夫々の比較回路
（5a）（5b）（5c）の反転入力端子に例えば、夫々3.6k
Ω、2.7kΩ及び2kΩの抵抗器（3a）（3b）及び（3c）を
介して接続する。これら比較回路（5a）（5b）及び（5
c）の反転入力端子を夫々例えば10kΩの抵抗器（4a）
（4b）及び（4c）を介して夫々接地する。この場合抵抗
器（3a）及び（4a）と、（3b）及び（4b）並に（3c）及
び（4c）は比較回路（5a）（5b）及び（5c）の夫々の反
転入力端子、即ち基準入力端子に供給する基準電圧を決
定する抵抗器であり、電池（１）の可変抵抗器（２）の
摺動子（2a）から得られる電圧と抵抗器（3a）及び（4
a）と（3b）及び（4b）並に（3c）及び（4c）で設定さ
れた基準電圧とが比較回路（5a）（5b）及び（5c）で比
較され、電池（１）の基準電圧より高い場合に比較回路
（5a）（5b）及び（5c）の出力信号が出力される様に成
されている。この比較回路（5a）（5b）及び（5c）の出
力端子を夫々駆動用のNPN型トランジスタ（6a）（6b）
及び（6c）のベースに接続し、このトランジスタ（6a）
（6b）及び（6c）の夫々のコレクタをLED（7a）（7b）
及び（7c）の夫々のカソードに接続し、このLED（7a）
（7b）及び（7c）の夫々のアノードを正の直流電圧が供
給される電源端子（８）に接続し、又、トランジスタ
（6a）（6b）及び（6c）の夫々のエミッタを接地する。
この場合、NPN型トランジスタ（6a）（6b）及び（6c）
が“オン”したときはNPNトランジスタ（6a）（6b）及
び（6c）の夫々のコレクタに接続されたLED（7a）（7
b）及び（7c）が発光する様に成す。即ち比較回路（5
a）（5b）及び（5c）の出力電圧が夫々7.9V、7.4V、7V
の時、LED（7a）（7b）及び（7c）を点灯する様に設定
されている。Although not shown, the battery (1) is connected to a portable load and has a battery remaining amount display circuit (7) shown in FIG.
It is connected to the. The positive electrode of this battery (1) is, for example, 10 k
Grounded via a variable resistor (2) of Ω, and the slider (2a) of the variable resistor (2) is non-inverted by a differential amplifier circuit constituting a comparison circuit (5a) (5b) (5c) Connect to each terminal. The positive electrode of the battery is connected to one end of a resistor (9) of 180Ω.
The other end of the resistor (9) is connected to the cathode of the Zener diode (10), and the anode is grounded to form a series circuit. The cathode of the Zener diode (10) is connected to the inverting input terminal of each of the comparison circuits (5a), (5b) and (5c), for example, 3.6k each.
Connect via Ω, 2.7 kΩ and 2 kΩ resistors (3a), (3b) and (3c). These comparison circuits (5a), (5b) and (5
Connect each of the inverting input terminals of c) with a 10kΩ resistor (4a)
Ground each via (4b) and (4c). In this case, the resistors (3a) and (4a) and (3b) and (4b) as well as (3c) and (4c) are the inverting input terminals of the comparison circuits (5a), (5b) and (5c), respectively. A resistor for determining a reference voltage to be supplied to a reference input terminal. The voltage obtained from a slider (2a) of a variable resistor (2) of a battery (1) and resistors (3a) and (4)
a) and (3b) and (4b) as well as the reference voltages set in (3c) and (4c) are compared by the comparison circuits (5a), (5b) and (5c), and the reference voltage of the battery (1) is compared. The output signals of the comparison circuits (5a), (5b) and (5c) are output when the voltage is higher. The output terminals of the comparison circuits (5a), (5b) and (5c) are respectively driven NPN transistors (6a) (6b)
And the transistor (6a) connected to the base of (6c)
LED (7a) (7b) for each collector of (6b) and (6c)
And the LED (7a) connected to the respective cathodes of (7c)
The anodes of (7b) and (7c) are connected to a power supply terminal (8) to which a positive DC voltage is supplied, and the emitters of the transistors (6a), (6b) and (6c) are grounded.
In this case, NPN transistors (6a) (6b) and (6c)
Is turned on, the LEDs (7a) (7) connected to the respective collectors of the NPN transistors (6a) (6b) and (6c)
b) and (7c) emit light. That is, the comparison circuit (5
a) Output voltage of (5b) and (5c) is 7.9V, 7.4V, 7V respectively
In the case of, the LEDs (7a), (7b) and (7c) are set to light up.
上記構成に於ける動作を以下に説明する。例えば、室
温20℃での電池（１）の稼動時間−放電電圧の特性曲線
は第２図の符号（11）で示す様に検知点A0では電池容量
が零で検知点A1での検知電圧が7V、検知点A2での検知電
圧が7.4V、検知点A3での検知電圧が7.9Vと仮定する。こ
の場合、検知点A0〜A1の範囲の放電電圧では表示回路
（７）のLED（7a）（7b）及び（7c）のすべてが消さ
れ、検知点A2の範囲ではLED（7c）のみ点灯し、検知点A
2〜A3の範囲ではLED（7b）（7c）のみ点灯し、検知点A3
以上の放電電圧ではLED（7a）（7b）及び（7c）のすべ
てが点灯して電池（１）の残存稼動時間が表示している
とする。The operation of the above configuration will be described below. For example, operating time of the battery (1) at room temperature 20 ° C. - detection of the characteristic curve of the discharge voltage detection point A 1 in the detection point A 0 battery capacity is zero at as indicated by the reference numeral (11) of FIG. 2 voltage 7V, detection voltage of the detection point a 2 is 7.4V, the detection voltage of the detection point a 3 assumed 7.9 V. In this case, LED display circuit in the discharge voltage in the range of detection points A 0 ~A 1 (7) ( 7a) (7b) and (7c) of all erased, LED in the range of the detection point A 2 (7c) Only lights up, detection point A
In the range of 2 to A 3 only lights LED (7b) (7c), the detection point A 3
It is assumed that all of the LEDs (7a), (7b), and (7c) are turned on at the above discharge voltage and the remaining operating time of the battery (1) is displayed.
第２図の曲線（12）及び（13）は例えば、電池（１）
の温度が上昇し、30℃及び40℃に上昇した時の稼動時間
−放電電圧の特性曲線を示すものである。The curves (12) and (13) in FIG.
4 shows a characteristic curve of the operation time-discharge voltage when the temperature of the battery rises to 30 ° C. and 40 ° C.
ここで、特性曲線（12）について考えてみると、特性
曲線（11）の残存稼動時間が、零の検知点A0に於ける、
特性曲線（12）の検知点A1′は角度θ1＞θ2であるため
特性曲線（11）の検知点A1＝7Vより低い放電電圧とな
る。即ち、検知点A1′＝7V−ΔV1となるために残存稼動
時間があと60分あるのに第３図の構成ではすべてのLED
（7a）（7b）及び（7c）が消され、電池の容量がなくな
ったことを示してしまう。特性曲線（13）についても同
様のことが云える。即ち角度θ2＞θ3であるため特性曲
線（12）の検知点A1′に比べて特性曲線（13）の検知点
A1″（特性曲線（12）の電池容量が零となる検出点
A0′）では検知点A1′の放電電圧より更に低い7V−（Δ
V1＋ΔV2）の値となる。そこで、本例では比較回路（5
a）（5b）及び（5c）の基準電圧が温度によって変化す
る様に動作させるためにツェナーダイオード（10）を基
準電圧供給源に設ける。ツェナーダイオード（10）は比
較的低電圧に用いるものはツェナー降伏によるものが多
く、このツェナー降伏型のものは温度が上がると電流増
加する様な温度係数が負の特性を示している。従って、
比較回路（5a）（5b）及び（5c）の反転入力に供給する
基準電圧は電池（１）の温度が変化し、例えば、電池
（１）の温度が上昇すると基準電圧が下がるので表示回
路（７）のLED（7a）（7b）及び（7c）は特性曲線（1
1）で示した室温での温度の時に比べて低い放電電圧
（特性曲線（12）では７−ΔV1を示す検知点A1′）で点
灯する様になるので温度変化による電池の容量の変化を
表示させることが出来る様になる。Here, when considering the characteristic curve (12), the remaining operation time of the characteristic curve (11) is zero at the detection point A 0 where zero.
Since the angle θ 1 > θ 2 at the detection point A 1 ′ of the characteristic curve (12), the discharge voltage is lower than the detection point A 1 = 7 V of the characteristic curve (11). In other words, although the remaining operation time is 60 minutes due to the detection point A 1 ′ = 7 V−ΔV 1 , all the LEDs in the configuration of FIG.
(7a) (7b) and (7c) are erased, indicating that the battery has run out of capacity. The same can be said for the characteristic curve (13). That is, since the angle θ 2 > θ 3 , the detection point of the characteristic curve (13) is compared with the detection point A 1 ′ of the characteristic curve (12).
A 1 ″ (Detection point at which the battery capacity of characteristic curve (12) becomes zero)
At A 0 ′), the discharge voltage at the detection point A 1 ′ is lower than 7V− (Δ
V 1 + ΔV 2 ). Therefore, in this example, the comparison circuit (5
a) A zener diode (10) is provided in the reference voltage supply so that the reference voltages of (5b) and (5c) change with temperature. Many of the Zener diodes (10) used at a relatively low voltage are based on Zener breakdown, and the Zener breakdown type has a negative temperature coefficient such that the current increases as the temperature rises. Therefore,
The reference voltage supplied to the inverting inputs of the comparison circuits (5a), (5b) and (5c) varies with the temperature of the battery (1). For example, when the temperature of the battery (1) rises, the reference voltage falls. 7) The LEDs (7a), (7b) and (7c) have characteristic curves (1).
The battery is turned on at a lower discharge voltage (detection point A 1 ′ indicating 7−ΔV 1 in the characteristic curve (12)) than at the temperature at room temperature shown in 1). Can be displayed.
尚、本考案な叙上の実施例に限定されることなく、ツ
ェナーダイオードの代わりに抵抗の温度変化とは異なる
方向に変化する様な負の温度特性を有する素子等を用い
ることが出来、本考案の要旨を逸脱しない範囲で種々変
更し得ることが明白である。In addition, without being limited to the above-described embodiment of the present invention, an element or the like having a negative temperature characteristic that changes in a direction different from the temperature change of the resistance can be used instead of the Zener diode. It is apparent that various modifications can be made without departing from the spirit of the invention.
本考案の電池の残量表示装置によれば電池の温度が変
化して残存稼動時間が延びた場合でも、その残存稼動時
間に対応し、電池に温度変化があっても電池の表示を正
確に行なうことが出来るものが得られる。According to the battery remaining amount display device of the present invention, even when the temperature of the battery changes and the remaining operating time is extended, the battery operation can be accurately performed even when the battery temperature changes, corresponding to the remaining operating time. You get what you can do.
第１図は本考案の電池の残量表示装置の一実施例を示す
回路図、第２図は電池の残量特性説明図、第３図は従来
の電池の残量表示装置の回路図、第４図は第３図の電池
の残量特性説明図である。 （１）は電池、（２）は可変抵抗器、（3a）（3b）（3
c）（4a）（4b）（4c）（９）は抵抗器、（5a）（5b）
（5c）は比較回路、（6a）（6b）（6c）は駆動トランジ
スタ、（７）は表示回路、（7a）（7b）（7c）はLED、
（10）はツェナーダイオードである。FIG. 1 is a circuit diagram showing one embodiment of a battery remaining amount display device of the present invention, FIG. 2 is an explanatory diagram of a battery remaining amount characteristic, FIG. 3 is a circuit diagram of a conventional battery remaining amount display device, FIG. 4 is an explanatory diagram of the remaining capacity characteristic of the battery of FIG. (1) battery, (2) variable resistor, (3a) (3b) (3
c) (4a) (4b) (4c) (9) are resistors, (5a) (5b)
(5c) is a comparison circuit, (6a) (6b) (6c) is a drive transistor, (7) is a display circuit, (7a) (7b) (7c) is an LED,
(10) is a Zener diode.
Claims (1)
昇によって容量が増加する電池と、該電池の電圧と、該
電池の電圧を分圧抵抗で分圧した基準電圧とを比較する
複数の比較手段と、該複数の比較手段の出力信号によ
り、上記電池の残量を表示する複数の発光素子より成る
表示手段とを有する電池の残量表示装置に於いて、 上記複数の比較手段の基準側端子に接続した複数の基準
電圧設定抵抗素子の抵抗温度特性に対して負の電圧温度
特性を有する１つの温度補償素子を上記分圧抵抗と接地
間に直列に接続し、該複数の基準電圧設定抵抗素子の共
通接続点を該分圧抵抗と該温度補償素子の直列接続中点
に接続して、上記基準電圧を常温時より降下させて、上
記電池が温度上昇により容量増加したとき温度補償を行
なって容量増加に見合った残存稼動時間を上記表示装置
に表示させて成ることを特徴とする残量表示装置。1. A battery comprising: a battery whose discharge voltage is decreased by discharge and whose capacity is increased by a rise in temperature; and a plurality of batteries for comparing the voltage of the battery with a reference voltage obtained by dividing the voltage of the battery by a voltage dividing resistor. In a battery remaining amount display device including a comparing unit and a display unit including a plurality of light emitting elements for displaying the remaining amount of the battery based on output signals of the plurality of comparing units, a reference of the plurality of comparing units is provided. One temperature compensating element having a negative voltage temperature characteristic with respect to the resistance temperature characteristic of the plurality of reference voltage setting resistance elements connected to the side terminal is connected in series between the voltage dividing resistor and ground, and the plurality of reference voltage The common connection point of the set resistance element is connected to the midpoint of the series connection of the voltage dividing resistor and the temperature compensation element, and the reference voltage is lowered from normal temperature to compensate for the temperature when the battery increases in capacity due to temperature rise. To increase capacity A remaining amount display device, wherein the remaining operation time is displayed on the display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989120387U JP2539330Y2 (en) | 1989-10-13 | 1989-10-13 | Battery level display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989120387U JP2539330Y2 (en) | 1989-10-13 | 1989-10-13 | Battery level display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0360088U JPH0360088U (en) | 1991-06-13 |
| JP2539330Y2 true JP2539330Y2 (en) | 1997-06-25 |
Family
ID=31668464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989120387U Expired - Lifetime JP2539330Y2 (en) | 1989-10-13 | 1989-10-13 | Battery level display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2539330Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007064041A (en) * | 2005-08-30 | 2007-03-15 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
| JP4955607B2 (en) * | 2008-05-22 | 2012-06-20 | 阪神エレクトリック株式会社 | Ignition coil for internal combustion engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6444481U (en) * | 1987-09-11 | 1989-03-16 | ||
| JP2576169B2 (en) * | 1987-10-13 | 1997-01-29 | ソニー株式会社 | Battery with remaining amount display function |
-
1989
- 1989-10-13 JP JP1989120387U patent/JP2539330Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0360088U (en) | 1991-06-13 |
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