JPH10174303A - Controller for controlling charging of battery - Google Patents
Controller for controlling charging of batteryInfo
- Publication number
- JPH10174303A JPH10174303A JP8335599A JP33559996A JPH10174303A JP H10174303 A JPH10174303 A JP H10174303A JP 8335599 A JP8335599 A JP 8335599A JP 33559996 A JP33559996 A JP 33559996A JP H10174303 A JPH10174303 A JP H10174303A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- voltage
- charging
- signal
- switching
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、バッテリの充電
形態をバッテリの温度に応じた切り換え電圧に従い定電
流充電から定電圧充電、またはその逆の切り換えを行な
う装置に関するものである。なお、このようなバッテリ
充電制御装置を利用する分野としては人工衛星のバッテ
リ充電制御が例として挙げられる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for switching a charging mode of a battery from constant current charging to constant voltage charging or vice versa in accordance with a switching voltage according to the temperature of the battery. An example of a field using such a battery charge control device is battery charge control of an artificial satellite.
【０００２】[0002]
【従来の技術】図７は衛星におけるバッテリ充電制御装
置を表す図であり、１はＶ／Ｔカーブ（バッテリ温度と
バッテリ電圧との相対関係を表したカーブであり、この
電圧において定電圧充電と定電流充電の切り換えが行な
われる。）を選択するコマンド、２はコマンド１により
Ｖ／Ｔカーブの一つを選択する信号を出力するＶ／Ｔカ
ーブ選択回路、３はバッテリ温度を電圧に変換した信号
（Ｔｂａｔ）、４−１、４−２、・・・、４−ｎはバッ
テリ温度信号３と内部に含まれているＶ／Ｔカーブの情
報から充電制御切り換え電圧（Ｖｃ）を出力するＶ／Ｔ
カーブ回路、５−１、５−２、・・・、５−ｎは選択さ
れたときにバッテリ温度信号３を４−１、４−２、・・
・、４−ｎに入力するスイッチ、６−１、６−２、・・
・、６−ｎは電流の逆流を防ぐダイオード、７はバッテ
リ電圧信号（Ｖｂａｔ）、８は選択されたＶ／Ｔカーブ
の充電制御切り換え電圧とバッテリ電圧信号７を比較す
る電圧比較装置、９は電圧比較装置の出力のレベルを反
転する装置、１０はバッテリの定電流充電回路、１１は
バッテリノ定電圧充電回路である。2. Description of the Related Art FIG. 7 is a diagram showing a battery charge control device in a satellite. Reference numeral 1 denotes a V / T curve (a curve representing the relative relationship between battery temperature and battery voltage. A command for selecting constant current charging is performed.), A reference numeral 2 denotes a V / T curve selection circuit that outputs a signal for selecting one of the V / T curves in response to the command 1, and a reference numeral 3 denotes a battery temperature converted to a voltage. The signals (Tbat), 4-1, 4-2,..., 4-n are Vs for outputting the charge control switching voltage (Vc) from the battery temperature signal 3 and the information of the V / T curve included therein. / T
The curve circuits 5-1, 5-2,..., 5-n output the battery temperature signal 3 when selected, as 4-1, 4-2,.
., Switches input to 4-n, 6-1, 6-2,.
.., 6-n is a diode for preventing a backflow of current, 7 is a battery voltage signal (Vbat), 8 is a voltage comparison device that compares the charge control switching voltage of the selected V / T curve with the battery voltage signal 7, and 9 is A device for inverting the output level of the voltage comparison device, 10 is a constant current charging circuit for a battery, and 11 is a constant voltage charging circuit for a battery.
【０００３】このような構成の従来のバッテリ充電制御
装置は、ハードウエアのみで制御されておりバッテリの
温度を温度センサーで測定し、その温度の関数として定
まる値にバッテリ電圧が達したら定電流充電から定電圧
充電に、逆にこの値以下となると定電圧充電から定電流
充電に切り換えを行なう作用を有している。上記したよ
うに、このバッテリ温度に対応した切り換え電圧の変化
はＶ／Ｔカーブとよばれ、図２に示すように通常複数用
意されている。また、この複数あるＶ／Ｔカーブの中で
バッテリに最適なＶ／Ｔカーブはバッテリの性能および
劣化の度合いにより変わる。A conventional battery charge control device having such a configuration is controlled only by hardware, and measures the temperature of the battery with a temperature sensor. When the battery voltage reaches a value determined as a function of the temperature, the battery is charged with a constant current. From the constant voltage charging to the constant voltage charging. As described above, the change in the switching voltage corresponding to the battery temperature is called a V / T curve, and usually a plurality of changes are prepared as shown in FIG. The optimum V / T curve for the battery among the plurality of V / T curves varies depending on the performance and the degree of deterioration of the battery.
【０００４】次に動作について説明する。まず、バッテ
リの運用者はバッテリの状態を考慮し予め複数あるＶ／
Ｔカーブから１つを選択する。具体的には、Ｖ／Ｔカー
ブ選択回路２にコマンド１を送信すると、Ｖ／Ｔカーブ
選択回路２の出力のどれかが通電しスイッチ５−１、５
−２、・・・、５−ｎのどれかがＯＮになり、バッテリ
温度信号（Ｔｂａｔ）が対応するＶ／Ｔカーブ回路４−
１、４−２、・・・、４−ｎの一つに入力されるように
なる。ここでは、説明のため５−１がＯＮになったと想
定する。するとＶ／Ｔカーブ回路４−１が動作し、バッ
テリ温度信号（Ｔｂａｔ）に対応した定電流／定電圧充
電切り換え電圧（Ｖｃ）を出力する。この電圧は逆流防
止のダイオード６−１を経由して電圧比較回路８に入力
される。電圧比較回路８では定電流／定電圧充電切り換
え電圧とバッテリ電圧信号（Ｖｂａｔ）７を比較し、Ｖ
ｂａｔ＜ＶｃならばＬレベル、Ｖｂａｔ≧ＶｃならばＨ
レベルの電圧を出力する。この出力がＬレベルのとき、
即ちＶｂａｔ＜Ｖｃのときは、反転回路９により定電流
充電回路１０がＯＮになり、Ｈレベルのとき、即ちＶｂ
ａｔ≧Ｖｃのときは定電圧回路１１がＯＮになる。Next, the operation will be described. First, the battery operator considers the state of the battery, and
Select one from the T curves. Specifically, when the command 1 is transmitted to the V / T curve selection circuit 2, one of the outputs of the V / T curve selection circuit 2 is energized, and the switches 5-1 and 5 are turned on.
,..., 5-n are turned on, and the battery temperature signal (Tbat) corresponds to the corresponding V / T curve circuit 4-
,..., 4-n. Here, it is assumed that 5-1 is turned on for the sake of explanation. Then, the V / T curve circuit 4-1 operates to output a constant current / constant voltage charge switching voltage (Vc) corresponding to the battery temperature signal (Tbat). This voltage is input to the voltage comparison circuit 8 via the backflow prevention diode 6-1. The voltage comparison circuit 8 compares the constant current / constant voltage charge switching voltage with the battery voltage signal (Vbat) 7 and
L level if bat <Vc, H level if Vbat ≧ Vc
Output level voltage. When this output is at L level,
That is, when Vbat <Vc, the constant current charging circuit 10 is turned on by the inverting circuit 9, and when it is at the H level, that is, Vb
When at ≧ Vc, the constant voltage circuit 11 is turned on.
【０００５】[0005]
【発明が解決しようとする課題】従来のバッテリ充電制
御装置は以上のように、Ｖ／Ｔカーブにもとづく定電圧
充電／定電流充電の切り換えをハードウエアの回路によ
り実施していたため、比較的少数のカーブしか設定でき
なかった。また、このカーブを増やそうとすると必然的
にハードウエア回路数が増えることになり、コストが増
加する。このため、かならずしも最適な切り換え電圧で
定電圧／定電流の切り換えができるわけではなかった。
また、Ｖ／Ｔカーブはバッテリによって異なるためバッ
テリが変わる度にハードウエアを再設計する必要があ
り、コストがかかるという問題があった。As described above, the conventional battery charging control device switches between constant voltage charging and constant current charging based on the V / T curve by a hardware circuit. Could only be set. Further, if this curve is to be increased, the number of hardware circuits inevitably increases, and the cost increases. For this reason, it has not always been possible to switch between constant voltage and constant current with an optimum switching voltage.
Further, since the V / T curve differs depending on the battery, it is necessary to redesign the hardware every time the battery changes, and there is a problem that the cost is increased.
【０００６】[0006]
【課題を解決するための手段】第１および第２の発明に
よるバッテリ充電制御装置は、従来はハードウエア回路
の機能により実現された複数のＶ／Ｔカーブにもとづい
て制御されていたバッテリの定電流充電／定電圧充電切
り換え動作をメモリに記憶されたＶ／Ｔカーブの情報に
基づいてＣＰＵからの指令により実行する。The battery charging control devices according to the first and second aspects of the present invention provide a battery charging control device which is controlled based on a plurality of V / T curves conventionally realized by the function of a hardware circuit. The current charging / constant voltage charging switching operation is executed according to a command from the CPU based on the information on the V / T curve stored in the memory.
【０００７】[0007]
実施の形態１．以下、この発明の実施の形態を図に基づ
いて説明する。図１において、１はＶ／Ｔカーブを選択
するためのコマンド、１２は動作プログラムおよびＶ／
Ｔカーブを記憶したメモリ、１３はメモリ１２からプロ
グラムを読み込み、実行するＣＰＵ、３はバッテリ温度
を電圧に変換した信号、１４はバッテリ電圧信号、バッ
テリ温度信号、および充電制御回路ＯＮ／ＯＦＦ信号を
入出力するＩ／Ｏインターフェース、７はバッテリ電圧
信号、１０は定電流充電回路、１１は定電圧充電回路で
ある。Embodiment 1 FIG. Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a command for selecting a V / T curve, 12 is an operation program and V / T curve.
A memory for storing a T-curve, a CPU 13 for reading and executing a program from the memory 12, a signal 3 for converting a battery temperature into a voltage, a signal 14 for a battery voltage signal, a battery temperature signal, and a charge control circuit ON / OFF signal. I / O interface for input / output, 7 is a battery voltage signal, 10 is a constant current charging circuit, and 11 is a constant voltage charging circuit.
【０００８】次に動作について説明する。図２に説明の
ために想定したＶ／Ｔカーブ群を、図３にソフトウエア
の動作を表すフローチャートを示す。最初に、コマンド
１により図２に示す複数のＶ／Ｔカーブの中から、ひと
つのカーブを選択する。ここでは、説明のため第ｎ番の
カーブを選択したものとする。この選択した番号ｎに対
応したＶ／Ｔカーブの係数（ａ［ｎ］，ｂ［ｎ］）をメ
モリ１２からＣＰＵ１３にロードする。次にバッテリ温
度信号（Ｔｂａｔ）３を、Ｉ／Ｏインターフェース１４
を介して読み込む。このバッテリ温度信号（Ｔｂａｔ）
３と選択されたＶ／Ｔカーブの係数（ａ［ｎ］，ｂ
［ｎ］）とから、切り換え電圧（Ｖｃ）を計算する。バ
ッテリ電圧信号（Ｖｂａｔ）７をＩ／Ｏインターフェー
ス１４を介して読み込む。バッテリ電圧信号（Ｖｂａ
ｔ）７と切り換え電圧（Ｖｃ）を比較し、Ｖｂａｔ＜Ｖ
ｃならば定電流充電回路１０をＯＮにし、Ｖｂａｔ≧Ｖ
ｃならば定電圧充電回路１１をＯＮにする。なお、以上
の動作はすべて、メモリ１２に予め記録されたプログラ
ムをＣＰＵ１３にロードし、実行することでソフトウエ
ア的に実現される。Next, the operation will be described. FIG. 2 shows a V / T curve group assumed for explanation, and FIG. 3 shows a flowchart showing the operation of the software. First, one curve is selected from a plurality of V / T curves shown in FIG. Here, it is assumed that the n-th curve is selected for explanation. The coefficient (a [n], b [n]) of the V / T curve corresponding to the selected number n is loaded from the memory 12 to the CPU 13. Next, the battery temperature signal (Tbat) 3 is transmitted to the I / O interface 14.
Read through. This battery temperature signal (Tbat)
3 and the coefficient of the selected V / T curve (a [n], b
[N]), the switching voltage (Vc) is calculated. The battery voltage signal (Vbat) 7 is read via the I / O interface 14. Battery voltage signal (Vba
t) 7 and the switching voltage (Vc) are compared, and Vbat <V
If c, the constant current charging circuit 10 is turned ON, and Vbat ≧ V
If c, the constant voltage charging circuit 11 is turned on. Note that all of the above operations are implemented in software by loading a program recorded in advance in the memory 12 into the CPU 13 and executing the program.
【０００９】実施の形態２．図４はこの発明の実施の形
態２を示すもので、図において３はバッテリ温度を電圧
に変換した信号、７はバッテリ電圧信号、１５は切り換
え電圧の上限を設定する切り換え上限電圧発生装置、１
６は切り換え電圧の下限を設定する切り換え下限電圧発
生装置、１７は切り換え上限電圧、１８は切り換え下限
電圧を表す。１９は切り換え上限電圧１７とバッテリ電
圧信号７を比較する電圧比較装置、２０は実施の形態１
で示したソフトウエアにより決定された充電制御形態を
示すＩ／Ｏインタフェース１４からの切り換え制御信号
で定電圧充電時にＨレベル、定電流充電時にＬレベルと
なる信号、２１はＩ／Ｏインタフェース１４からの切り
換え制御信号２０と電圧比較装置１９の出力の論理和を
とる論理和装置、２２は切り換え下限電圧１８とバッテ
リ電圧信号７を比較する電圧比較装置、２３は論理和装
置２１と電圧比較装置２２との論理積をとる論理積装
置、９は入力レベルと反対のレベルを出力する反転装
置、１０はバッテリの定電流充電回路、１１はバッテリ
の定電圧充電回路である。Embodiment 2 FIG. 4 shows a second embodiment of the present invention, in which 3 is a signal obtained by converting a battery temperature into a voltage, 7 is a battery voltage signal, 15 is a switching upper limit voltage generator for setting an upper limit of switching voltage, 1
6 is a switching lower limit voltage generator for setting the lower limit of the switching voltage, 17 is the switching upper limit voltage, and 18 is the switching lower limit voltage. 19 is a voltage comparison device for comparing the switching upper limit voltage 17 with the battery voltage signal 7, and 20 is the first embodiment.
A switching control signal from the I / O interface 14 indicating the charge control mode determined by the software shown by the signal H level during constant voltage charging and L level during constant current charging. A logical OR device for calculating the logical sum of the switching control signal 20 and the output of the voltage comparing device 19; a voltage comparing device 22 for comparing the switching lower limit voltage 18 with the battery voltage signal 7; 23 a logical OR device 21 and the voltage comparing device 22 9 is an inverting device that outputs a level opposite to the input level, 10 is a constant current charging circuit for the battery, and 11 is a constant voltage charging circuit for the battery.
【００１０】ところで、実施の形態１においては、定電
流充電／定電圧充電の切り換えをソフトウエアで実現す
ることによりＶ／Ｔカーブの数をコストをほとんど上げ
ずに増やすことができる。しかしながら、例えば本装置
を人工衛星のバッテリ充電制御に利用する場合、ＣＰＵ
は宇宙環境においては放射線の影響等により暴走するこ
とがある。実施の形態１で述べた構造では、ＣＰＵが暴
走した場合にバッテリ電圧に関係なく定電圧充電になり
ほとんどバッテリが充電されなかったり、逆に、定電流
回路がＯＮになりつづけ過充電されたりするおそれがあ
る。そこで、上記で説明したハードウエア回路を付加す
ることによって、実施の形態１の効果はそのままで、Ｃ
ＰＵが暴走した時でも、充電不足や過充電を防ぐことを
考える。In the first embodiment, the switching between the constant current charging and the constant voltage charging is realized by software, so that the number of V / T curves can be increased with almost no increase in cost. However, for example, when this apparatus is used for battery charge control of an artificial satellite, the CPU
May run away due to the effects of radiation in the space environment. In the structure described in the first embodiment, when the CPU goes out of control, the battery is charged at a constant voltage regardless of the battery voltage, and the battery is hardly charged, or conversely, the constant current circuit is turned on and overcharged. There is a risk. Therefore, by adding the hardware circuit described above, the effect of the first embodiment is maintained and the C
Consider how to prevent insufficient charging or overcharging even when the PU runs away.
【００１１】まず、基本的な考え方を説明する。バッテ
リの特性に応じて、各々のバッテリ温度において定電流
充電が必須となるバッテリ電圧の領域と定電圧充電が必
須となるバッテリ電圧の領域がそれぞれ定められる。さ
らに、定電流充電が必須となるバッテリ電圧の領域に対
しては上限値、定電圧充電が必須となるバッテリ電圧に
対しては下限値が、各々のバッテリ電圧において定ま
る。これは、図２で設定したＶ／Ｔカーブ群の上下に非
常用のＶ／Ｔカーブ（Ｖ／Ｔ−Ｕ，Ｖ／Ｔ−Ｌ）を設定
することになる。この様子を図５に示す。この図５にお
いて、領域Ｌでは必ず定電流充電となり、領域Ｕでは必
ず定電圧充電にならなくてはならない。領域Ｍでは、Ｃ
ＰＵの機能が正常であれば選択されたＶ／Ｔカーブによ
る充電制御が行なわれる。First, the basic concept will be described. In accordance with the characteristics of the battery, a battery voltage region where constant current charging is essential at each battery temperature and a battery voltage region where constant voltage charging is essential at each battery temperature are determined. Furthermore, an upper limit value is determined for a battery voltage region where constant current charging is essential, and a lower limit value is determined for each battery voltage where constant voltage charging is essential. This means that emergency V / T curves (V / TU, V / TL) are set above and below the V / T curve group set in FIG. This is shown in FIG. In FIG. 5, constant current charging must be performed in the area L, and constant voltage charging must be performed in the area U. In region M, C
If the function of the PU is normal, the charge control based on the selected V / T curve is performed.
【００１２】次に図４に基づいて詳細な動作を説明す
る。バッテリ温度信号（Ｔｂａｔ）３は常に切り換え上
限電圧発生装置１５と切り換え下限電圧発生装置１６に
入力され、その時のバッテリ温度における切り換え電圧
の上限値１７と下限値１８が出力されている。切り換え
上限電圧（Ｖｃｕ）１７とバッテリ電圧信号（Ｖｂａ
ｔ）７は電圧比較器１９で比較され、Ｖｂａｔ＜Ｖｃｕ
ならばＬレベルを出力、Ｖｂａｔ≧ＶｃｕならばＨレベ
ルが電圧比較器１９から出力される。この出力とＣＰＵ
１３でソフトウエアにより計算されＩ／Ｏインタフェー
ス１４を経由して出力される切り換え制御信号２０との
論理和がとられる。この場合のＩ／Ｏインタフェース１
４からの信号ロジックは、定電圧充電の場合はＨレベ
ル、定電流充電の場合はＬレベルとなるようにしてお
く。この論理和装置２１の出力は図６に示すように、バ
ッテリ電圧信号（Ｖｂａｔ）７が切り換え上限電圧１７
以上、即ち図４の領域Ｕに属しているならば、Ｉ／Ｏイ
ンタフェース１４からの切り換え制御信号２０のレベル
がＨレベル／Ｌレベルどちらの場合でもＨレベルとな
る。一方、切り換え下限電圧（Ｖｃｌ）１８とバッテリ
電圧信号（Ｖｂａｔ）７は電圧比較器２２で比較され、
Ｖｂａｔ＜ＶｃｌならばＬレベル、Ｖｂａｔ≧Ｖｃｌな
らばＨレベルが電圧比較器２２から出力される。この電
圧比較器２２の出力と論理和装置２１の出力を論理積装
置２３に入力する。この論理積装置２３の出力は図６に
示すように、Ｉ／Ｏインタフェース１４からの切り換え
制御信号のレベルによらず、領域ＵにおいてはＨ、領域
ＬにおいてはＬとなる。この出力がＬレベルならば、論
理反転装置９により論理が反転されＨレベルが入力され
ることで定電流充電回路１０が動作し、Ｈレベルならば
定電圧充電回路１１が動作する。Next, a detailed operation will be described with reference to FIG. The battery temperature signal (Tbat) 3 is always input to the switching upper limit voltage generator 15 and the switching lower limit voltage generator 16, and the upper limit value 17 and the lower limit value 18 of the switching voltage at the battery temperature at that time are output. Switching upper limit voltage (Vcu) 17 and battery voltage signal (Vba)
t) 7 is compared by the voltage comparator 19, and Vbat <Vcu
If so, the L level is output, and if Vbat ≧ Vcu, the H level is output from the voltage comparator 19. This output and CPU
At 13, a logical sum with a switching control signal 20 calculated by software and output via the I / O interface 14 is obtained. I / O interface 1 in this case
The signal logic from No. 4 is set to H level for constant voltage charging and to L level for constant current charging. As shown in FIG. 6, the output of the OR device 21 is such that the battery voltage signal (Vbat) 7 is switched to the upper limit voltage 17.
As described above, that is, if the switching control signal 20 from the I / O interface 14 is in the area U in FIG. On the other hand, the switching lower limit voltage (Vcl) 18 and the battery voltage signal (Vbat) 7 are compared by a voltage comparator 22.
If Vbat <Vcl, the L level is output from the voltage comparator 22, and if Vbat ≧ Vcl, the H level is output from the voltage comparator 22. The output of the voltage comparator 22 and the output of the logical sum device 21 are input to the logical product device 23. As shown in FIG. 6, the output of the AND device 23 is H in the area U and L in the area L regardless of the level of the switching control signal from the I / O interface 14. If this output is at the L level, the logic is inverted by the logic inversion device 9 and the H level is input, so that the constant current charging circuit 10 operates. If the output is at the H level, the constant voltage charging circuit 11 operates.
【００１３】ところで、実施の形態２においてはＣＰＵ
異常時に過充電および充電不足の両者についてハードウ
エア回路による対策を施しているが、バッテリの性能お
よび使用条件によってはどちらかの対策を施すだけでＣ
ＰＵ異常時の対策として十分な場合もありうる。By the way, in the second embodiment, the CPU
Hardware measures are taken for both overcharging and undercharging in the event of an abnormality. However, depending on the performance and use conditions of the battery, only one of
In some cases, it may be sufficient as a measure against a PU abnormality.
【００１４】[0014]
【発明の効果】第１の発明によるバッテリ充電制御装置
は、定電圧充電／定電流充電の切り換えをメモリに記憶
されたＶ／Ｔカーブに基づいて行なっているため、Ｖ／
Ｔカーブの数をハードウエアを増加させることなく、簡
単に増やすことができるという効果を持つ。また、軌道
上において、Ｖ／Ｔカーブを変更することもできるとい
う効果、バッテリに依存せずハードウエアの標準化がで
きるという効果も持つ。The battery charging control device according to the first invention switches between constant voltage charging and constant current charging based on the V / T curve stored in the memory.
There is an effect that the number of T curves can be easily increased without increasing hardware. In addition, the V / T curve can be changed on orbit, and the hardware can be standardized without depending on the battery.
【００１５】また、第２の発明によれば、第１の発明の
効果に加え、ＣＰＵが故障しメモリに記憶されたＶ／Ｔ
カーブが正常に機能しない場合に、ハードウエア回路に
より実現された定電圧充電が必須となるバッテリ電圧の
下限値および定電流充電が必須となるバッテリ電圧の上
限値の情報を用いることで、過充電もしくは充電不足が
発生することを防ぐ効果がある。According to the second invention, in addition to the effects of the first invention, the V / T stored in the memory due to the CPU failure is stored.
When the curve does not function properly, overcharging is performed by using the information on the lower limit of the battery voltage, which requires constant-voltage charging realized by the hardware circuit, and the upper limit of the battery voltage, which requires constant-current charging. Alternatively, there is an effect of preventing occurrence of insufficient charging.
【図１】 この発明によるバッテリ充電制御装置の実施
の形態１を示す図である。FIG. 1 is a diagram showing Embodiment 1 of a battery charge control device according to the present invention.
【図２】 設定される複数のＶ／Ｔカーブを示した図で
ある。FIG. 2 is a diagram showing a plurality of V / T curves to be set.
【図３】 この発明によるバッテリ充電制御装置のプロ
グラムの動作を示すフローチャートである。FIG. 3 is a flowchart showing an operation of a program of the battery charge control device according to the present invention.
【図４】 ＣＰＵが暴走したときに充電不足や過充電に
なることを防ぐ機能を追加したバッテリ充電制御装置の
実施の形態２を示す図である。FIG. 4 is a diagram showing a second embodiment of a battery charge control device to which a function for preventing insufficient charging or overcharging when the CPU runs away is added.
【図５】 切り換えの上限電圧と下限電圧、および定電
流充電すべき領域と定電圧充電すべき領域を示した図で
ある。FIG. 5 is a diagram showing an upper limit voltage and a lower limit voltage for switching, a region to be charged at a constant current, and a region to be charged at a constant voltage.
【図６】 図４に示した各領域における充電形態を、途
中の論理装置の状態とともに示した表。FIG. 6 is a table showing a charging mode in each area shown in FIG. 4 together with states of logic devices on the way.
【図７】 従来のバッテリ充電制御装置の構造を示す図
である。FIG. 7 is a diagram showing a structure of a conventional battery charge control device.
１ Ｖ／Ｔカーブ指定コマンド、２ Ｖ／Ｔカーブ選択
回路、３ バッテリ温度信号、４ Ｖ／Ｔカーブ回路、
５ スイッチ、６ ダイオード、７ バッテリ電圧信
号、８ 電圧比較装置、９ 論理反転装置、１０ 定電
流充電回路、１１定電圧充電回路、１２ メモリ、１３
ＣＰＵ、１４ Ｉ／Ｏインターフェース、１５ 切り
換え上限電圧発生装置、１６ 切り換え下限電圧発生装
置、１７切り換え上限電圧、１８ 切り換え下限電圧、
１９ 電圧比較装置、２０ 切り換え制御指令、２１
論理和装置、２２ 電圧比較装置、２３ 論理積装置。1 V / T curve designation command, 2 V / T curve selection circuit, 3 battery temperature signal, 4 V / T curve circuit,
Reference Signs List 5 switch, 6 diode, 7 battery voltage signal, 8 voltage comparison device, 9 logic inversion device, 10 constant current charging circuit, 11 constant voltage charging circuit, 12 memory, 13
CPU, 14 I / O interface, 15 switching upper limit voltage generator, 16 switching lower limit voltage generator, 17 switching upper limit voltage, 18 switching lower limit voltage,
19 voltage comparison device, 20 switching control command, 21
OR device, 22 voltage comparison device, 23 logical product device.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｈ０２Ｊ 7/04 Ｈ０２Ｊ 7/04 Ａ Ｌ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI H02J 7/04 H02J 7/04 AL
Claims (3)
プログラムおよびその切り換えの基準となるバッテリ温
度とその温度に依存して定まるバッテリ電圧との相対関
係が記憶されたメモリと、このメモリとつながり、バッ
テリ温度に依存して定まるバッテリ電圧において上記プ
ログラムによってバッテリの充電形態切り換え指令を出
力するＣＰＵと、ＣＰＵからの切り換え指令を受けて充
電形態切り換えのための信号を出力するインタフェース
回路と、このインタフェース回路の出力信号を受ける定
電流充電回路および定電圧充電回路とで構成され、バッ
テリの充電形態をバッテリ温度とバッテリ電圧との相対
関係に従って定電流充電もしくは定電圧充電のいずれか
に切り換えることを特徴とするバッテリ充電制御装置。1. A memory for storing a program for switching a charging mode of a battery and a relative temperature between a battery temperature serving as a reference for the switching and a battery voltage determined depending on the temperature, and a memory connected to the memory. A CPU for outputting a charge mode switching command of the battery by the program at a battery voltage determined depending on the temperature, an interface circuit for receiving a switch command from the CPU and outputting a signal for charging mode switching, It comprises a constant current charging circuit and a constant voltage charging circuit for receiving an output signal, and switches a charging mode of the battery to either constant current charging or constant voltage charging according to a relative relationship between the battery temperature and the battery voltage. Battery charge control device.
充電形態切り換え信号と、バッテリ温度に依存して定ま
る定電流充電形態となるべきバッテリ電圧の上限を示す
信号を出力するハードウエア回路と、それらの信号を論
理的に合成する回路とを備え、ＣＰＵが故障して常時定
電流充電制御状態になることでバッテリが過充電となる
ことを、上記ハードウエア回路の出力するバッテリ電圧
の上限を示す信号を用いて防ぐようにしたことを特徴と
する請求項１記載のバッテリ充電制御装置。2. A hardware circuit for outputting a charging mode switching signal output from the interface circuit, a signal indicating an upper limit of a battery voltage to be in a constant current charging mode determined depending on a battery temperature, and signals for the hardware circuit. A signal that indicates the upper limit of the battery voltage output from the hardware circuit, indicating that the battery is overcharged due to the failure of the CPU and the constant current charging control state. The battery charge control device according to claim 1, wherein the battery charge control device is used to prevent the battery charge.
充電形態切り換え信号と、バッテリ温度に依存して定ま
る定電圧充電形態となるべきバッテリ電圧の下限を示す
信号を出力するハードウエア回路と、それらの信号を論
理的に合成する回路とを備え、ＣＰＵが故障して常時定
電圧充電制御状態になることで充電量が減少することを
上記ハードウエア回路の出力するバッテリ電圧の下限を
示す信号を用いて防ぐようにしたことを特徴とする請求
項１記載のバッテリ充電制御装置。3. A hardware circuit for outputting a charging mode switching signal output from the interface circuit, a signal indicating a lower limit of a battery voltage to be in a constant voltage charging mode determined depending on the battery temperature, and signals for the hardware circuit. A circuit that logically synthesizes the signals, and using the signal indicating the lower limit of the battery voltage output from the hardware circuit to indicate that the amount of charge is reduced due to the failure of the CPU and the constant voltage charging control state. The battery charge control device according to claim 1, wherein the battery charge control device is configured to prevent the battery charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33559996A JP3820658B2 (en) | 1996-12-16 | 1996-12-16 | Battery charge control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33559996A JP3820658B2 (en) | 1996-12-16 | 1996-12-16 | Battery charge control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10174303A true JPH10174303A (en) | 1998-06-26 |
| JP3820658B2 JP3820658B2 (en) | 2006-09-13 |
Family
ID=18290391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33559996A Expired - Fee Related JP3820658B2 (en) | 1996-12-16 | 1996-12-16 | Battery charge control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3820658B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008283853A (en) * | 2007-05-11 | 2008-11-20 | Commissariat A L'energie Atomique | Method for charging battery of autonomic system |
| JP2009189131A (en) * | 2008-02-05 | 2009-08-20 | Panasonic Corp | Charging control circuit, battery pack, and charging system |
| JP2016010198A (en) * | 2014-06-23 | 2016-01-18 | 株式会社マキタ | Charging control device, battery pack, and charger |
| JP2018166404A (en) * | 2018-08-01 | 2018-10-25 | 株式会社マキタ | Charge control device, battery pack and charger |
-
1996
- 1996-12-16 JP JP33559996A patent/JP3820658B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008283853A (en) * | 2007-05-11 | 2008-11-20 | Commissariat A L'energie Atomique | Method for charging battery of autonomic system |
| JP2009189131A (en) * | 2008-02-05 | 2009-08-20 | Panasonic Corp | Charging control circuit, battery pack, and charging system |
| JP2016010198A (en) * | 2014-06-23 | 2016-01-18 | 株式会社マキタ | Charging control device, battery pack, and charger |
| JP2018166404A (en) * | 2018-08-01 | 2018-10-25 | 株式会社マキタ | Charge control device, battery pack and charger |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3820658B2 (en) | 2006-09-13 |
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