JPH09247852A - Battery pack and controlling method of battery - Google Patents
Battery pack and controlling method of batteryInfo
- Publication number
- JPH09247852A JPH09247852A JP8051793A JP5179396A JPH09247852A JP H09247852 A JPH09247852 A JP H09247852A JP 8051793 A JP8051793 A JP 8051793A JP 5179396 A JP5179396 A JP 5179396A JP H09247852 A JPH09247852 A JP H09247852A
- Authority
- JP
- Japan
- Prior art keywords
- charging
- battery
- current
- battery pack
- power saving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Tests Of Electric Status Of Batteries (AREA)
- Direct Current Feeding And Distribution (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えばビデオカメ
ラや携帯用電話機、或いはパーソナルコンピュータ等の
各種の電子機器の電源として使用されるバッテリパック
及びバッテリの制御方法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 pack used as a power source for various electronic devices such as a video camera, a mobile phone, a personal computer and the like, and a battery control method.
【０００２】[0002]
【従来の技術】従来より、リチウムイオン電池、ＮｉＣ
ｄ電池、ニッケル水素電池等の２次電池で構成されたバ
ッテリパックは周知である。2. Description of the Related Art Conventionally, lithium ion batteries, NiC
Battery packs composed of secondary batteries such as d batteries and nickel-hydrogen batteries are well known.
【０００３】この周知のバッテリパックには、例えば、
バッテリの残量計算や当該バッテリを電源とする電子機
器との間の通信を行うためのマイクロコンピュータ（い
わゆるマイコン）と、このマイコンの周辺回路、さらに
当該マイコンにてバッテリの残量計算等を行うために必
要な、バッテリセルの状態検出回路等が内蔵されている
ことが多い。[0003] This known battery pack includes, for example,
A microcomputer (so-called microcomputer) for calculating the remaining amount of the battery and communicating with an electronic device using the battery as a power source, peripheral circuits of the microcomputer, and further calculating the remaining amount of the battery in the microcomputer. In many cases, a battery cell state detection circuit and the like necessary for this purpose are incorporated.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記バッテ
リパック内に上記マイコンやその周辺回路、さらにはバ
ッテリセルの状態検出回路等の電気回路を設けた場合、
これら電気回路を常に動作させておくと、消費電力が大
きくなり、バッテリ残量がすぐに減ってしまう。By the way, in the case where the electric circuit such as the microcomputer and its peripheral circuits and the battery cell state detection circuit is provided in the battery pack,
If these electric circuits are always operated, power consumption will increase and the remaining battery level will decrease immediately.
【０００５】そこで、本発明は上述したことを考慮して
なされたものであり、不要な電力消費を減らしてバッテ
リの省電力化を可能とし、バッテリの長寿命化を図るこ
とができるバッテリパック及びバッテリの制御方法を提
供することを目的とする。Therefore, the present invention has been made in consideration of the above, and it is possible to reduce unnecessary power consumption, save battery power, and extend battery life. It is an object to provide a battery control method.
【０００６】[0006]
【課題を解決するための手段】本発明のバッテリパック
では、バッテリセルの充放電電流を検出し、この充放電
電流の検出出力に基づいて、通常動作モードと省電力モ
ードとの切換制御を行うことにより、上述の課題を解決
する。In the battery pack of the present invention, the charging / discharging current of the battery cell is detected, and switching control between the normal operation mode and the power saving mode is performed based on the detection output of this charging / discharging current. By doing so, the above-mentioned problems are solved.
【０００７】また本発明のバッテリの制御方法では、バ
ッテリセルの充放電電流を検出し、この検出したバッテ
リセルの充放電電流が閾値電流以下のとき、内蔵してい
る回路部を省電力モードに切り換え制御し、一方、検出
したバッテリセルの充放電電流が閾値電流以上のとき、
回路部を通常動作モードに切換制御することにより、上
述の課題を解決する。Further, in the battery control method of the present invention, the charging / discharging current of the battery cell is detected, and when the detected charging / discharging current of the battery cell is less than or equal to the threshold current, the built-in circuit section is set to the power saving mode. Switching control, on the other hand, when the detected charge / discharge current of the battery cell is equal to or more than the threshold current,
The above-mentioned problem is solved by controlling the switching of the circuit unit to the normal operation mode.
【０００８】すなわち、本発明によれば、バッテリセル
の充放電電流に基づいて回路部が動作状態か否かを判断
し、動作状態でないと判断したときには省電力モードと
することにより、不要な電力消費を減らすようにしてい
る。That is, according to the present invention, it is determined whether or not the circuit section is in the operating state based on the charging / discharging current of the battery cell. I try to reduce consumption.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
【００１０】図１には、本発明のバッテリパックの一構
成例を示す。FIG. 1 shows an example of the structure of the battery pack of the present invention.
【００１１】この図１に示すバッテリパック１は、充放
電がなされるバッテリセル２０と、上記バッテリセル２
０の充放電電流を検出する電流検出回路８０と、上記バ
ッテリセル２０の充放電に関する信号処理を行い、通常
動作モードと省電力モードとを有するマイクロコンピュ
ータ（マイコン）１０とを備え、当該マイコン１０では
上記電流検出回路８０からの検出出力に基づいて上記各
モードの切換制御を行うようにしている。The battery pack 1 shown in FIG. 1 includes a battery cell 20 that is charged and discharged and the battery cell 2 described above.
The microcomputer 10 includes a current detection circuit 80 that detects a charge / discharge current of 0, and a microcomputer 10 that performs signal processing related to charging / discharging of the battery cells 20 and has a normal operation mode and a power saving mode. Then, switching control of each of the above modes is performed based on the detection output from the current detection circuit 80.
【００１２】この図１のバッテリパック１において、上
記バッテリセル２０の正極は当該バッテリパック１のプ
ラス端子ＴＭ+に、またバッテリセル２０の負極は電流
電圧検出抵抗Ｒ７を介して当該バッテリパック１のマイ
ナス端子ＴＭ-に接続されている。In the battery pack 1 of FIG. 1, the positive electrode of the battery cell 20 is connected to the positive terminal TM + of the battery pack 1, and the negative electrode of the battery cell 20 is connected to the battery pack 1 via the current / voltage detection resistor R7. negative terminal TM - a are connected.
【００１３】当該バッテリパック１に内蔵されるマイコ
ン１０には、シリーズレギュレータやリセット回路等を
含むマイコン電源１６からの電源が供給され、当該マイ
コン１０はこのマイコン電源１６から供給される電源に
より動作する。このマイコン１０の充電電流検出入力端
子ＤＩ１は充電電流検出用に設けられているオペアンプ
１３の出力端子と接続され、放電電流検出入力端子ＤＩ
２は放電電流検出用に設けられているオペアンプ１４の
出力端子と接続されている。また、マイコン１０の割り
込み入力端子は、オペアンプ１３と１４の各出力端子が
２つの入力端子に接続された２入力ＮＡＮＤゲート１５
の出力端子と接続され、さらにこの２入力ＮＡＮＤゲー
ト１５の出力端子はプルアップ用の抵抗Ｒ８を介してマ
イコン電源１６と接続されている。その他、詳細は後述
するが、マイコン１０の温度検出入力端子はバッテリセ
ル２０の周辺温度を検出する温度センサ１９の出力端子
と接続され、電圧検出入力端子はバッテリセル２０の端
子間電圧を検出する電圧検出回路１８の出力端子と接続
され、サイクルデータ入力端子は不揮発性メモリ１７の
出力端子と、グランド端子はバッテリセル２０の負極
と、通信用の入力端子（ＳＩＮ端子）及び出力端子（Ｓ
ＯＵＴ端子）はバッファアンプ１１，１２と接続されて
いる。なお、上記充電電流検出入力端子ＤＩ１及び放電
電流検出入力端子ＤＩ２や温度検出入力端子，電圧検出
入力端子等のアナログ入力がなされる端子は、全てＡ／
Ｄ入力ポートであり、したがって、当該マイコン１０内
にはこれらアナログ入力をディジタル変換するＡ／Ｄコ
ンバータが内蔵されている。The microcomputer 10 built in the battery pack 1 is supplied with power from a microcomputer power supply 16 including a series regulator, a reset circuit, etc., and the microcomputer 10 is operated by the power supplied from the microcomputer power supply 16. . The charging current detection input terminal DI1 of the microcomputer 10 is connected to the output terminal of the operational amplifier 13 provided for charging current detection, and the discharging current detection input terminal DI
Reference numeral 2 is connected to the output terminal of the operational amplifier 14 provided for detecting the discharge current. The interrupt input terminal of the microcomputer 10 is a 2-input NAND gate 15 in which the output terminals of the operational amplifiers 13 and 14 are connected to the two input terminals.
The output terminal of the 2-input NAND gate 15 is connected to the microcomputer power supply 16 via the pull-up resistor R8. Although details will be described later, the temperature detection input terminal of the microcomputer 10 is connected to the output terminal of the temperature sensor 19 that detects the ambient temperature of the battery cell 20, and the voltage detection input terminal detects the inter-terminal voltage of the battery cell 20. It is connected to the output terminal of the voltage detection circuit 18, the cycle data input terminal is the output terminal of the non-volatile memory 17, the ground terminal is the negative electrode of the battery cell 20, the input terminal (SIN terminal) and the output terminal (SIN) for communication.
The OUT terminal) is connected to the buffer amplifiers 11 and 12. It should be noted that all terminals for analog input such as the charging current detection input terminal DI1 and the discharge current detection input terminal DI2, the temperature detection input terminal, and the voltage detection input terminal are A /
It is a D input port, and therefore, the microcomputer 10 has an A / D converter for digitally converting these analog inputs.
【００１４】上記オペアンプ１３の非反転入力端子は抵
抗Ｒ３を介してバッテリセル２０の負極と接続され、反
転入力端子は増幅率設定用の負帰還抵抗Ｒ２並びに抵抗
Ｒ１と接続されている。したがって、当該オペアンプ１
３の出力端子からは、当該バッテリパック１内に流れる
電流値（充電時に流れる電流値）を上記抵抗Ｒ１とＲ２
の抵抗値の比（Ｒ２／Ｒ１）に応じて増幅した電圧値が
出力されることになる。一方、オペアンプ１４の非反転
入力端子は抵抗Ｒ６及び電流電圧検出用の抵抗Ｒ７を介
してバッテリセル２０の負極と接続され、反転入力端子
は負帰還抵抗Ｒ５並びに抵抗Ｒ４と接続されている。し
たがって、当該オペアンプ１４の出力端子からは、当該
バッテリパック１内に流れる電流値（放電時に流れる電
流値）を上記抵抗Ｒ４とＲ５の抵抗値の比（Ｒ５／Ｒ
４）に応じて増幅した電圧値が出力されることになる。The non-inverting input terminal of the operational amplifier 13 is connected to the negative electrode of the battery cell 20 via the resistor R3, and the inverting input terminal is connected to the negative feedback resistor R2 and the resistor R1 for setting the amplification factor. Therefore, the operational amplifier 1
The current value flowing in the battery pack 1 (current value flowing at the time of charging) is output from the output terminals of the resistors R1 and R2.
The amplified voltage value is output according to the resistance value ratio (R2 / R1). On the other hand, the non-inverting input terminal of the operational amplifier 14 is connected to the negative electrode of the battery cell 20 via the resistor R6 and the current / voltage detecting resistor R7, and the inverting input terminal is connected to the negative feedback resistor R5 and the resistor R4. Therefore, from the output terminal of the operational amplifier 14, the value of the current flowing in the battery pack 1 (the value of the current flowing at the time of discharging) is set to the ratio of the resistance values of the resistors R4 and R5 (R5 / R).
The voltage value amplified according to 4) is output.
【００１５】また、トランジスタスイッチＴｒ１は例え
ば電界効果トランジスタからなり、ゲートがマイコン１
０のスイッチング制御出力端子ＳＷ１と接続され、ドレ
インとソース間に上記抵抗Ｒ１が挿入接続されている。
したがって、マイコン１０のスイッチング制御出力端子
ＳＷ１からの信号レベルが例えばハイ（Ｈ）レベルとな
ったときには、上記トランジスタスイッチＴｒ１がＯＮ
し、これにより上記抵抗Ｒ１による抵抗値は略々０（ト
ランジスタスイッチＴｒ１の内部抵抗のみとなる）とな
り、上記抵抗Ｒ１とＲ２の抵抗値の比（Ｒ２／Ｒ１）に
応じて増幅率が設定されるオペアンプ１３の当該増幅率
（アンプゲイン）は大となる。一方、マイコン１０のス
イッチング制御出力端子ＳＷ１からの信号レベルが例え
ばロー（Ｌ）レベルとなったときには、上記トランジス
タスイッチＴｒ１はＯＦＦし、これにより上記オペアン
プ１３の増幅率は上記抵抗Ｒ１とＲ２の抵抗値の比（Ｒ
２／Ｒ１）に応じた増幅率、すなわちトランジスタスイ
ッチＴｒ１がＯＮしているときよりも小さい増幅率（ア
ンプゲイン）となる。同様に、トランジスタスイッチＴ
ｒ２も例えば電界効果トランジスタからなり、ゲートが
マイコン１０のスイッチング制御出力端子ＳＷ２と接続
され、ドレインとソース間に上記抵抗Ｒ４が挿入接続さ
れている。したがって、マイコン１０のスイッチング制
御出力端子ＳＷ２からの信号レベルが例えばハイ（Ｈ）
レベルとなったときには上記トランジスタスイッチＴｒ
２がＯＮし、これにより上記抵抗Ｒ４による抵抗値は略
々０（トランジスタスイッチＴｒ２の内部抵抗のみとな
る）となり、オペアンプ１４の増幅率（アンプゲイン）
は大となる。一方、マイコン１０のスイッチング制御出
力端子ＳＷ２からの信号レベルが例えばロー（Ｌ）レベ
ルになったときには上記トランジスタスイッチＴｒ２は
ＯＦＦし、これによりオペアンプ１４の増幅率（アンプ
ゲイン）は小となる。The transistor switch Tr1 is composed of, for example, a field effect transistor, and the gate thereof is the microcomputer 1
0 is connected to the switching control output terminal SW1, and the resistor R1 is inserted and connected between the drain and the source.
Therefore, when the signal level from the switching control output terminal SW1 of the microcomputer 10 becomes, for example, high (H) level, the transistor switch Tr1 is turned on.
As a result, the resistance value of the resistor R1 becomes substantially 0 (only the internal resistance of the transistor switch Tr1), and the amplification factor is set according to the ratio (R2 / R1) of the resistance values of the resistors R1 and R2. The amplification factor (amplifier gain) of the operational amplifier 13 becomes large. On the other hand, when the signal level from the switching control output terminal SW1 of the microcomputer 10 becomes, for example, a low (L) level, the transistor switch Tr1 is turned off, whereby the amplification factor of the operational amplifier 13 is the resistance of the resistors R1 and R2. Ratio of values (R
2 / R1), that is, an amplification factor (amplifier gain) smaller than that when the transistor switch Tr1 is ON. Similarly, the transistor switch T
The r2 is also composed of, for example, a field effect transistor, the gate is connected to the switching control output terminal SW2 of the microcomputer 10, and the resistor R4 is inserted and connected between the drain and the source. Therefore, the signal level from the switching control output terminal SW2 of the microcomputer 10 is high (H), for example.
When it becomes the level, the above transistor switch Tr
2, the resistance value of the resistor R4 becomes approximately 0 (only the internal resistance of the transistor switch Tr2), and the amplification factor (amplifier gain) of the operational amplifier 14 becomes.
Is great. On the other hand, when the signal level from the switching control output terminal SW2 of the microcomputer 10 becomes a low (L) level, for example, the transistor switch Tr2 is turned off, whereby the amplification factor (amplifier gain) of the operational amplifier 14 becomes small.
【００１６】ここで、上記マイコン１０は、通常動作モ
ード時（Ｒｕｎ時）には常に上記充電電流検出入力端子
ＤＩ１と放電電流検出入力端子ＤＩ２のレベルを監視し
ており、これら端子ＤＩ１，ＤＩ２のレベルが一定レベ
ル以上になっているときには、上記スイッチング制御出
力端子ＳＷ１及びＳＷ２の信号レベルを共にローレベル
となす。これにより、上記トランジスタスイッチＴｒ１
及びＴｒ２は共にＯＦＦとなり、オペアンプ１３及び１
４のアンプゲインは小となる。したがって、通常動作モ
ード時（Ｒｕｎ時）のマイコン１０は、アンプゲインが
小となされたオペアンプ１３及び１４からの出力値を用
いて、当該バッテリパック１内に流れる電流値（充電時
に流れる電流値又は放電時に流れる電流値）を測定可能
となる。このため、マイコン１０は、例えば充放電時に
流れる電流値がわかり、充放電電流積算値等が計算でき
るようになる。Here, the microcomputer 10 constantly monitors the levels of the charging current detection input terminal DI1 and the discharging current detection input terminal DI2 in the normal operation mode (Run), and these terminals DI1 and DI2 are monitored. When the level is above a certain level, the signal levels of the switching control output terminals SW1 and SW2 are both set to the low level. As a result, the transistor switch Tr1
And Tr2 are both turned off, and the operational amplifiers 13 and 1
The amplifier gain of 4 is small. Therefore, in the normal operation mode (Run), the microcomputer 10 uses the output values from the operational amplifiers 13 and 14 whose amplifier gains are set to be small, so that the current value flowing in the battery pack 1 (the current value flowing during charging or It is possible to measure the current value that flows during discharge. For this reason, the microcomputer 10 can know the value of the current flowing at the time of charging / discharging, and can calculate the integrated value of charging / discharging current or the like.
【００１７】これに対し、上記通常動作モード時（Ｒｕ
ｎ時）にあるときに、当該バッテリパック１内に流れる
充放電電流値がある所定値以下の微少電流値になると、
上記アンプゲインが小となされているオペアンプ１３及
び１４からの出力値も小さくなる。すなわち、上記充電
電流検出入力端子ＤＩ１と放電電流検出入力端子ＤＩ２
のレベルも小さくなる。このとき、上記マイコン１０
は、上記端子ＤＩ１，ＤＩ２のレベルが一定レベル以下
となり、この状態が一定時間以上続いたならば、無負荷
状態であると判断して省電力モード（スリープモード）
に移行する。この省電力モード時には、上記通常動作モ
ード時に比べて消費電力が小さくなり、したがって、回
路の省エネルギ化が可能となる。On the other hand, in the normal operation mode (Ru
n)), when the charging / discharging current value flowing in the battery pack 1 becomes a small current value equal to or less than a predetermined value,
The output values from the operational amplifiers 13 and 14 whose amplifier gains are small are also small. That is, the charging current detection input terminal DI1 and the discharging current detection input terminal DI2
The level of will also be smaller. At this time, the microcomputer 10
If the levels of the terminals DI1 and DI2 are below a certain level and this state continues for a certain time or longer, it is determined that there is no load state, and the power saving mode (sleep mode)
Move to In the power saving mode, the power consumption is smaller than that in the normal operation mode, so that the circuit energy can be saved.
【００１８】この省電力モード（スリープモード）にな
ったときのマイコン１０は、上記スイッチング制御出力
端子ＳＷ１及びＳＷ２の信号レベルを共にハイレベルと
なす。これにより、上記トランジスタスイッチＴｒ１及
びＴｒ２は共にＯＮになり、オペアンプ１３及び１４の
アンプゲインは大となる。したがって、当該省電力モー
ド（スリープモード）のマイコン１０は、アンプゲイン
が大となされたオペアンプ１３及び１４からの出力値を
用いて、当該バッテリパック１内に流れる微少電流値
（充電時に流れる微少電流値又は放電時に流れる微少電
流値）を測定可能となる。When the power saving mode (sleep mode) is entered, the microcomputer 10 sets both the signal levels of the switching control output terminals SW1 and SW2 to the high level. As a result, both the transistor switches Tr1 and Tr2 are turned on, and the amplifier gains of the operational amplifiers 13 and 14 become large. Therefore, the microcomputer 10 in the power saving mode (sleep mode) uses the output values from the operational amplifiers 13 and 14 whose amplifier gains are set to be large, and thus the minute current value flowing in the battery pack 1 (the minute current flowing during charging). It is possible to measure the value or the minute current value that flows during discharge.
【００１９】ここで、当該省電力モードになっていると
きに、当該バッテリパック１内に流れる充放電電流値が
上記所定値以上の電流値になると、上記アンプゲインが
小となされているオペアンプ１３及び１４からの出力値
は共に大きくなる。すなわち、上記２入力ＮＡＮＤゲー
ト１５の２つの入力端子のレベルは共にハイレベルとな
り、したがって、当該２入力ＮＡＮＤゲート１５の出力
はローレベルとなる。このように、割り込み入力端子に
供給されている上記２入力ＮＡＮＤゲート１５の出力レ
ベルがローレベルになると、マイコン１０は、上記省電
力モードを解除して通常動作モードに移行する。Here, in the power saving mode, when the charging / discharging current value flowing in the battery pack 1 becomes a current value equal to or more than the predetermined value, the operational amplifier 13 in which the amplifier gain is set to be small. The output values from 14 and 14 both increase. That is, the levels of the two input terminals of the 2-input NAND gate 15 are both high, and therefore the output of the 2-input NAND gate 15 is low. In this way, when the output level of the 2-input NAND gate 15 supplied to the interrupt input terminal becomes low level, the microcomputer 10 releases the power saving mode and shifts to the normal operation mode.
【００２０】上述のように、図１の構成によれば、省電
力モード時には通常動作モード時に比べて消費電力が小
さいため、回路の省エネルギ化を図ることができる。ま
た、図１の構成によれば、マイコン１０がスイッチング
制御出力ＳＷ１，ＳＷ２にてトランジスタＴｒ１，Ｔｒ
２をＯＮ／ＯＦＦ制御することにより、オペアンプ１
３，１４のアンプゲインを切り換え可能となし、これに
より、省電力モード時の微少電流値の検出と、通常動作
モード時の電流値の測定を、上記構成で兼用可能となし
ている。As described above, according to the configuration of FIG. 1, since the power consumption in the power saving mode is smaller than that in the normal operation mode, energy saving of the circuit can be achieved. Further, according to the configuration of FIG. 1, the microcomputer 10 outputs the switching control outputs SW1 and SW2 to the transistors Tr1 and Tr.
By controlling ON / OFF of 2, the operational amplifier 1
It is possible to switch the amplifier gains of 3 and 14 so that the detection of the minute current value in the power saving mode and the measurement of the current value in the normal operation mode can be combined in the above configuration.
【００２１】次に、上記マイコン１０における動作モー
ドの切り換え処理の流れを図２を用いて説明する。Next, the flow of operation mode switching processing in the microcomputer 10 will be described with reference to FIG.
【００２２】図２において、ステップＳＴ１ではマイコ
ン１０がＲｕｎ（通常動作モード）となっているとす
る。このとき、ステップＳＴ２のように、スイッチング
制御出力端子ＳＷ１とＳＷ２の出力レベルは共にローレ
ベルとなされている。次にステップＳＴ３では前記一定
時間との比較に用いる変数ｔを０に初期化し、ステップ
ＳＴ４では充電電流検出入力端子ＤＩ１の入力値が固定
値Ｉ0より小さいか、また放電電流検出入力端子ＤＩ２
の入力値が固定値Ｉ0より小さいかの判断を行う。ステ
ップＳＴ４で小さくないと判断した場合にはステップＳ
Ｔ１に戻り、小さいと判断した場合にはステップＳＴ５
に進む。In FIG. 2, it is assumed that the microcomputer 10 is in the Run (normal operation mode) in step ST1. At this time, as in step ST2, the output levels of the switching control output terminals SW1 and SW2 are both low. Next, in step ST3, the variable t used for comparison with the fixed time is initialized to 0, and in step ST4, the input value of the charging current detection input terminal DI1 is smaller than the fixed value I 0 or the discharge current detection input terminal DI2.
It is determined whether the input value of is smaller than the fixed value I 0 . When it is determined in step ST4 that it is not small, step S
Returning to T1, if it is judged to be small, step ST5
Proceed to.
【００２３】ステップＳＴ５では、変数ｔに１を加え
（インクリメント）、次のステップＳＴ６では変数ｔが
前記一定時間である固定値ｔ0より小さいか否かを判断
し、小さいと判断した場合にはステップＳＴ４に戻り、
小さくないと判断した場合（すなわち一定時間を越えた
と判断した場合）にはステップＳＴ７に進む。ステップ
ＳＴ７ではスイッチング制御出力端子ＳＷ１とＳＷ２の
値をハイレベルにし、これによりステップＳＴ８にてス
リープモード（省電力モード）に入る。In step ST5, 1 is added (incremented) to the variable t, and in the next step ST6, it is determined whether or not the variable t is smaller than the fixed value t 0 which is the fixed time. Return to step ST4,
When it is determined that it is not smaller (that is, when it is determined that the predetermined time is exceeded), the process proceeds to step ST7. In step ST7, the values of the switching control output terminals SW1 and SW2 are set to a high level, so that the sleep mode (power saving mode) is entered in step ST8.
【００２４】また、ステップＳＴ９では割り込み入力端
子の状態を見ており、割り込み入力がないとき（割り込
み入力がハイレベルのとき）は、当該ステップＳＴ９の
判断を繰り返し、割り込み入力があったとき（割り込み
入力がローレベル）になったときはステップＳＴ１に進
む。Further, in step ST9, the state of the interrupt input terminal is observed. When there is no interrupt input (when the interrupt input is high level), the determination in step ST9 is repeated, and when there is an interrupt input (interrupt When the input becomes low level), the process proceeds to step ST1.
【００２５】次に、図１の他の構成要素について説明す
る。Next, other components of FIG. 1 will be described.
【００２６】電圧検出回路１８は、抵抗Ｒ９及びＲ１０
からなる分圧抵抗であり、この分圧抵抗によりバッテリ
セル２０の端子間電圧を検出する。この電圧検出回路１
８からの電圧検出値が、マイコン１０の上記電圧検出入
力端子に供給されている。したがって、当該マイコン１
０は上記電圧検出入力端子に供給された電圧検出回路１
８からの電圧検出値に基づいて、バッテリセル２０の端
子間電圧の変化を知ることができる。The voltage detection circuit 18 includes resistors R9 and R10.
The voltage-dividing resistor is composed of the voltage-dividing resistor, and the voltage between the terminals of the battery cell 20 is detected by the voltage-dividing resistor. This voltage detection circuit 1
The voltage detection value from 8 is supplied to the voltage detection input terminal of the microcomputer 10. Therefore, the microcomputer 1
0 is the voltage detection circuit 1 supplied to the voltage detection input terminal
Based on the detected voltage value from 8, the change in the voltage between the terminals of the battery cell 20 can be known.
【００２７】また、温度センサ１９は、例えば温度検出
用サーミスタ等からなり、バッテリセル２０の近傍或い
は接して配置されており、この温度センサ１９の温度検
出値が上記マイコン１０の温度検出入力端子に供給され
るようになっている。したがって、当該マイコン１０
は、上記温度検出入力端子に供給された温度検出値に基
づいて、バッテリセル２０の温度を知ることができる。The temperature sensor 19 is composed of, for example, a temperature detecting thermistor, and is arranged near or in contact with the battery cell 20, and the temperature detection value of the temperature sensor 19 is input to the temperature detection input terminal of the microcomputer 10. It is being supplied. Therefore, the microcomputer 10
Can know the temperature of the battery cell 20 based on the temperature detection value supplied to the temperature detection input terminal.
【００２８】さらに、不揮発性メモリ１７は、上記バッ
テリセル２０の使用可能な最大充放電サイクル回数のデ
ータ（サイクルデータ）を少なくとも記憶する例えばＥ
ＥＰ−ＲＯＭからなっている。マイコン１０は、当該不
揮発性メモリ１７からの最大充放電サイクル回数のデー
タ（サイクルデータ）を読み出すと共に、前記電圧検出
回路１８からの検出電圧に基づいて上記バッテリセル２
０の充放電サイクル回数を計測し、バッテリセル２０の
充放電サイクル回数が上記最大充放電サイクル回数に達
したときに、その旨のフラグを当該バッテリパック１が
装着される電子機器に対して送信するようになされてい
る。Further, the non-volatile memory 17 stores at least data (cycle data) of the maximum number of charge / discharge cycles that can be used by the battery cell 20, for example, E
It consists of EP-ROM. The microcomputer 10 reads the maximum charge / discharge cycle count data (cycle data) from the non-volatile memory 17, and based on the detected voltage from the voltage detection circuit 18, the battery cell 2
The number of charge / discharge cycles of 0 is measured, and when the number of charge / discharge cycles of the battery cell 20 reaches the maximum number of charge / discharge cycles, a flag to that effect is transmitted to the electronic device to which the battery pack 1 is attached. It is designed to do.
【００２９】このバッテリバック１が装着される電子機
器は、上記バッテリパック１から伝送されてきた上記フ
ラグを受信することにより、例えばバッテリパック１の
交換をユーザに促すための表示を行うことが可能とな
る。なお、この表示例としては、例えば「このバッテリ
は古くなりました、取りかえて下さい」というような表
示を行う。これにより、ユーザ等は簡単にバッテリバッ
ク１の寿命を知ることが可能となる。By receiving the flag transmitted from the battery pack 1, the electronic device in which the battery back 1 is mounted can display, for example, a message prompting the user to replace the battery pack 1. Becomes As an example of this display, a display such as "This battery is old, please replace it" is displayed. As a result, the user or the like can easily know the life of the battery back 1.
【００３０】次に、図３には、図１の構成に更に他の回
路ブロック３０を付加た例を示す。この回路ブロック３
０は、上記マイコン１０のように自分自身で通常動作モ
ードと省電力モードの切り換え制御ができないものであ
る。この図３の構成では、上記回路ブロック３０がスイ
ッチ３１を介してバッテリセル２０と接続されている。
当該スイッチ３１は、上記スイッチング制御出力端子Ｓ
Ｗ１からの信号に応じてＯＮ／ＯＦＦするものであり、
スイッチング制御出力端子ＳＷ１からの信号が例えば通
常動作モード時を示すとき（ローレベル）にはＯＮとな
り、省電力モードを示すとき（ハイレベル）にはＯＦＦ
となる。これにより、省電力モードのときには、当該回
路ブロック３０への電力供給が停止され、したがって、
電力消費が抑えられるようになる。なお、回路ブロック
３０としては、例えば前記温度センサ１９への電源供給
回路等が挙げられる。なお、微少電流が流れている省電
力モード時にはバッテリセル２０の温度を監視する必要
性が少ないため、当該温度センサ１９への電源供給を停
止してもよい。Next, FIG. 3 shows an example in which another circuit block 30 is added to the configuration of FIG. This circuit block 3
No. 0 cannot control the switching between the normal operation mode and the power saving mode by itself like the microcomputer 10. In the configuration of FIG. 3, the circuit block 30 is connected to the battery cell 20 via the switch 31.
The switch 31 has the switching control output terminal S.
It is turned on / off according to the signal from W1,
For example, when the signal from the switching control output terminal SW1 indicates the normal operation mode (low level), it turns on, and when it indicates the power saving mode (high level), it turns off.
Becomes As a result, in the power saving mode, the power supply to the circuit block 30 is stopped, and therefore,
Power consumption will be reduced. The circuit block 30 may be, for example, a power supply circuit for the temperature sensor 19. In addition, since it is less necessary to monitor the temperature of the battery cell 20 in the power saving mode in which a minute current is flowing, the power supply to the temperature sensor 19 may be stopped.
【００３１】次に、図４には、上述したバッテリパック
１が適用されるシステム構成として、例えばカメラ一体
型のビデオテープレコーダ（以下ビデオカメラ６０とす
る）のシステムの概略構成を示す。Next, FIG. 4 shows, as a system configuration to which the above-mentioned battery pack 1 is applied, a schematic configuration of a system of a video tape recorder (hereinafter referred to as a video camera 60) integrated with a camera, for example.
【００３２】この図４において、バッテリパック１には
上記マイコン１０とバッテリセル２０と前記充放電検出
回路８０とが少なくとも設けられ、マイコン１０にはビ
デオカメラ６０との間で通信を行うための通信回路７２
と、このバッテリパック１の状態を示す情報を生成する
情報生成回路７１とが内蔵されている。この構成例の情
報生成回路７１では、上記バッテリバック１の状態を示
す情報として、例えばバッテリ残容量情報や充放電電流
検出情報、バッテリセル電圧検出情報、温度検出情報、
前記最大充放電サイクル回数に達した時のフラグ等を生
成する。なお、バッテリパック１０のマイコン１０とビ
デオカメラ６０との通信は、バッテリパック１０側のバ
ッファアンプ１１及び１２と、ビデオカメラ６０側のバ
ッファアンプ６１，６２を介して行われる。また、ビデ
オカメラ６０は撮影のための構成や撮影した映像信号を
記録／再生するための各種構成を有するが、図４の例で
はマイコン６３と表示デバイス６４のみを図示してい
る。In FIG. 4, the battery pack 1 is provided with at least the microcomputer 10, the battery cell 20, and the charge / discharge detection circuit 80, and the microcomputer 10 communicates with the video camera 60. Circuit 72
And an information generation circuit 71 that generates information indicating the state of the battery pack 1. In the information generation circuit 71 of this configuration example, as the information indicating the state of the battery back 1, for example, remaining battery capacity information, charge / discharge current detection information, battery cell voltage detection information, temperature detection information,
A flag or the like is generated when the maximum number of charge / discharge cycles is reached. The communication between the microcomputer 10 of the battery pack 10 and the video camera 60 is performed via the buffer amplifiers 11 and 12 on the battery pack 10 side and the buffer amplifiers 61 and 62 on the video camera 60 side. Further, the video camera 60 has a structure for photographing and various structures for recording / reproducing the photographed video signal, but in the example of FIG. 4, only the microcomputer 63 and the display device 64 are shown.
【００３３】当該バッテリパック１のプラス端子はビデ
オカメラ６０のプラス端子と接続され、バッテリパック
１のマイナス端子はビデオカメラ６０のマイナス端子と
接続され、これらプラス端子とマイナス端子を介してバ
ッテリパック１からビデオカメラ６０に対して電源が供
給される。また、バッテリパック１とビデオカメラ６０
との間はコントロール端子を介して行われる。The plus terminal of the battery pack 1 is connected to the plus terminal of the video camera 60, the minus terminal of the battery pack 1 is connected to the minus terminal of the video camera 60, and the battery pack 1 is connected through these plus and minus terminals. Power is supplied to the video camera 60 from. In addition, the battery pack 1 and the video camera 60
Is performed via the control terminal.
【００３４】ビデオカメラ６０は、上記コントロール端
子を介してバッテリパック１から当該バッテリパック１
の状態を示す情報を受信し、マイコン６３に取り込む。
マイコン６３の通信回路６５を介した情報は、計算回路
６６に送られ、ここで各種の計算が行われ、そのうち表
示すべき情報が表示制御回路６７に送られる。当該表示
制御回路６７では上記表示すべき情報から表示信号を生
成し、表示デバイス６４に送る。これにより表示デバイ
ス６４にはバッテリパック１の例えばバッテリ状態とし
て例えばバッテリ残量や最大充放電サイクル回数を過ぎ
た旨の表示等がなされる。The video camera 60 is operated from the battery pack 1 to the battery pack 1 via the control terminal.
The information indicating the state is received and is taken into the microcomputer 63.
The information via the communication circuit 65 of the microcomputer 63 is sent to the calculation circuit 66, where various calculations are performed, and the information to be displayed is sent to the display control circuit 67. The display control circuit 67 generates a display signal from the information to be displayed and sends it to the display device 64. As a result, the display device 64 displays, for example, the battery status of the battery pack 1 such as the remaining battery capacity and the maximum number of charge / discharge cycles.
【００３５】なお、上述した説明では、バッテリパック
が装着される電子機器としてビデオカメラを例に挙げた
が、この電子機器はビデオカメラに限らず、携帯用電話
機やパーソナルコンピュータ等の各種電子機器であっ
て、前記バッテリ残時間等を表示可能な表示デバイスを
有するものであれば、何れのものであってもよい。In the above description, a video camera is taken as an example of the electronic device to which the battery pack is attached, but the electronic device is not limited to the video camera, and various electronic devices such as a mobile phone and a personal computer. Any device may be used as long as it has a display device capable of displaying the remaining battery time and the like.
【００３６】[0036]
【発明の効果】本発明のバッテリパックにおいては、バ
ッテリセルの充放電電流を検出し、この充放電電流の検
出出力に基づいて、通常動作モードと省電力モードとの
切換制御を行うようにし、本発明のバッテリの制御方法
においては、バッテリセルの充放電電流を検出し、この
検出したバッテリセルの充放電電流が閾値電流以下のと
き、内蔵している回路部を省電力モードに切り換え制御
し、一方、検出したバッテリセルの充放電電流が閾値電
流以上のとき、回路部を通常動作モードに切換制御する
ことにより、不要な電力消費を減らしてバッテリの省電
力化が可能となり、バッテリの長寿命化を図ることがで
きる。In the battery pack of the present invention, the charging / discharging current of the battery cell is detected, and the switching control between the normal operation mode and the power saving mode is performed based on the detection output of the charging / discharging current. In the battery control method of the present invention, the charging / discharging current of the battery cell is detected, and when the detected charging / discharging current of the battery cell is equal to or less than the threshold current, the built-in circuit unit is controlled to be switched to the power saving mode. On the other hand, when the detected charge / discharge current of the battery cell is equal to or higher than the threshold current, the circuit section is controlled to switch to the normal operation mode to reduce unnecessary power consumption and save battery power. The life can be extended.
【図１】本発明のバッテリパックの具体的構成例を示す
回路図である。FIG. 1 is a circuit diagram showing a specific configuration example of a battery pack of the present invention.
【図２】本発明のバッテリパックにおける省電力モード
と通常動作モードの切り換え制御の判断処理の流れを示
すフローチャートである。FIG. 2 is a flowchart showing a flow of a determination process of switching control between the power saving mode and the normal operation mode in the battery pack of the present invention.
【図３】本発明のバッテリパックの他の具体的構成例を
示す回路図である。FIG. 3 is a circuit diagram showing another specific configuration example of the battery pack of the present invention.
【図４】本発明のバッテリパック及びバッテリの制御方
法が適用されるビデオカメラシステムの一構成例を示す
ブロック回路図である。FIG. 4 is a block circuit diagram showing a configuration example of a video camera system to which the battery pack and the battery control method of the present invention are applied.
１ バッテリパック、 １０ マイコン、 １７ 不揮
発性メモリ、 １８電圧検出回路、 ２０ バッテリセ
ル、 ８０ 充放電検出回路1 battery pack, 10 microcomputer, 17 non-volatile memory, 18 voltage detection circuit, 20 battery cell, 80 charge / discharge detection circuit
Claims (6)
と、 上記バッテリセルの充放電に関する信号処理を行い、通
常動作モードと省電力モードとを有する回路部とを備
え、 上記電流検出部からの検出出力に基づいて上記回路部の
上記各モードの切換制御を行わせることを特徴とするバ
ッテリパック。1. A battery cell to be charged / discharged, a current detection unit for detecting a charge / discharge current of the battery cell, a signal processing for charging / discharging the battery cell, and a normal operation mode and a power saving mode. A battery pack comprising a circuit section, and switching control of each mode of the circuit section based on a detection output from the current detecting section.
度と通常感度とに切換制御される構成を有し、 上記回路部が省電力モードに切換制御されるとき、上記
電流検出部の電流検出感度を上記高感度に切換制御する
ことを特徴とする請求項１記載のバッテリパック。2. The current detection unit has a configuration in which the current detection sensitivity is controlled to be switched between a high sensitivity and a normal sensitivity, and when the circuit unit is controlled to be switched to a power saving mode, the current detection unit of the current detection unit is controlled. The battery pack according to claim 1, wherein the current detection sensitivity is controlled to be switched to the high sensitivity.
充電電流検出手段と、放電電流検出手段とを有して成る
ことを特徴とする請求項１記載のバッテリパック。3. The battery pack according to claim 1, wherein the current detecting section includes a charging current detecting means for the battery cell and a discharging current detecting means.
たない第２の回路部を有し、上記電流検出部からの検出
出力に基づいて上記第２の回路部をオン／オフ制御する
ことを特徴とする請求項１記載のバッテリパック。4. A second circuit section having no power saving mode is provided separately from the circuit section, and ON / OFF control of the second circuit section is performed based on a detection output from the current detection section. The battery pack according to claim 1, wherein the battery pack is a battery pack.
ルの充放電電流を検出し、 検出された上記バッテリセルの充放電電流が閾値電流以
下のとき、上記バッテリパックに内蔵された省電力モー
ドを有する回路部を省電力モードに切換制御し、 検出された上記バッテリセルの充放電電流が閾値電流以
上のとき、上記回路部を通常動作モードに切換制御する
ことを特徴とするバッテリの制御方法。5. A power saving mode incorporated in the battery pack is detected when a charge / discharge current of the battery cell incorporated in the battery pack is detected, and the detected charge / discharge current of the battery cell is equal to or less than a threshold current. A method of controlling a battery, wherein the circuit section is controlled to switch to a power saving mode, and when the detected charging / discharging current of the battery cell is equal to or more than a threshold current, the circuit section is controlled to switch to a normal operation mode.
流以下となる状態が一定時間以上連続したとき、上記回
路部を省電力モードに切換制御することを特徴とする請
求項５記載のバッテリの制御方法。6. The battery according to claim 5, wherein the circuit unit is controlled to switch to a power saving mode when a state in which the charge / discharge current of the battery cell is equal to or lower than a threshold current continues for a predetermined time or longer. Control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05179396A JP3541546B2 (en) | 1996-03-08 | 1996-03-08 | Battery pack and battery control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05179396A JP3541546B2 (en) | 1996-03-08 | 1996-03-08 | Battery pack and battery control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09247852A true JPH09247852A (en) | 1997-09-19 |
| JP3541546B2 JP3541546B2 (en) | 2004-07-14 |
Family
ID=12896828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05179396A Expired - Fee Related JP3541546B2 (en) | 1996-03-08 | 1996-03-08 | Battery pack and battery control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3541546B2 (en) |
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