JPH0884438A - Battery charger - Google Patents
Battery chargerInfo
- Publication number
- JPH0884438A JPH0884438A JP21684194A JP21684194A JPH0884438A JP H0884438 A JPH0884438 A JP H0884438A JP 21684194 A JP21684194 A JP 21684194A JP 21684194 A JP21684194 A JP 21684194A JP H0884438 A JPH0884438 A JP H0884438A
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- JP
- Japan
- Prior art keywords
- temperature
- voltage
- current
- output
- transformer
- 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.)
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- Continuous-Control Power Sources That Use Transistors (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
(57)【要約】
【目的】交流電源１から整流器２，６，トランス４，ス
イッチング素子５等を介し直流電源を得てバッテリ８を
定電流充電する急速充電器でトランス４の温度が所定温
度を越えたとき、その後の温度上昇に応じて出力電流Ｉ
O を下げ、トランス発熱の少ない低電圧バッテリの充電
時間を短縮する。
【構成】トランス４の温度が所定値以下の時、その温度
を検出するサーミスタ２１の抵抗は大（温度検出電圧Ｅ
T 小）で、温度信号増幅器２４の出力Ｅout（負）はダ
イオードＤ1 により阻止され、電流誤差増幅器１０は検
出抵抗９からの電流検出信号９ａのみを入力して基準電
圧１１と比較し、出力電流ＩO を一定に制御する。トラ
ンス温度が所定値を越えると温度検出電圧ＥT の増加分
に比例する出力電圧Ｅout が加算器２６にて電流検出信
号９ａに加算され、以後はこの加算値が一定となるよう
電流ＩO が制御され、トランス温度上昇に応じ出力電流
ＩO が漸減する。
(57) [Abstract] [Purpose] A rapid charger that obtains a DC power supply from an AC power supply 1 through a rectifier 2, 6, a transformer 4, a switching element 5 and the like to charge a battery 8 at a constant current, and the temperature of the transformer 4 is a predetermined temperature. Output current I in response to the subsequent temperature rise
Lower O to shorten the charging time of the low voltage battery with less heat generation in the transformer. [Composition] When the temperature of the transformer 4 is below a predetermined value, the resistance of the thermistor 21 for detecting the temperature is large (temperature detection voltage E
At (T small), the output E out (negative) of the temperature signal amplifier 24 is blocked by the diode D 1 , and the current error amplifier 10 inputs only the current detection signal 9a from the detection resistor 9 and compares it with the reference voltage 11, The output current I O is controlled to be constant. When the transformer temperature exceeds a predetermined value, the output voltage E out proportional to the increase in the temperature detection voltage E T is added to the current detection signal 9a by the adder 26, and thereafter, the current I O is kept so that this addition value becomes constant. Is controlled, and the output current I O gradually decreases as the transformer temperature rises.
Description
【０００１】[0001]
【産業上の利用分野】本発明は商用交流電源からスイッ
チングトランスとスイッチング素子を介してバッテリ充
電用の直流電源を作り、複数本のバッテリを急速に充電
する急速充電器としてのバッテリ充電装置に関する。な
お、以下各図において同一の符号は同一もしくは相当部
分を示す。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charger as a quick charger for rapidly charging a plurality of batteries from a commercial AC power source via a switching transformer and a switching element to produce a DC power source for battery charging. In the drawings, the same reference numerals denote the same or corresponding parts.
【０００２】[0002]
【従来の技術】図４は従来の急速充電器の構成例を示す
ブロック回路図である。同図において１は商用の交流電
源、２は電源１の交流電圧を直流電圧に整流変換する整
流器、３は整流器２の出力する直流電圧を平滑化する平
滑回路、４は１次巻線４ａに、この平滑化された直流電
圧をスイッチング素子５を介して所定周期で断続印加さ
れ、２次巻線４ｂにバッテリ充電のための低圧の交流電
圧を発生するスイッチングトランスである。2. Description of the Related Art FIG. 4 is a block circuit diagram showing a configuration example of a conventional quick charger. In the figure, 1 is a commercial AC power supply, 2 is a rectifier that rectifies and converts the AC voltage of the power supply 1 into DC voltage, 3 is a smoothing circuit that smoothes the DC voltage output from the rectifier 2, and 4 is a primary winding 4a. The smoothing DC voltage is intermittently applied through the switching element 5 at a predetermined cycle to generate a low-voltage AC voltage for charging the battery in the secondary winding 4b.
【０００３】６はトランス４の２次巻線４ｂの交流電圧
を整流する整流器、７はこの整流された直流電圧を平滑
化する平滑回路、８は充電される負荷となるバッテリ、
９はバッテリ８への充電出力電流ＩO を検出するための
電流検出抵抗、１０は電流検出抵抗９の検出電圧として
の電流検出信号９ａと基準電圧１１とを比較し、その誤
差電圧を増幅する電流誤差増幅器、１２は電流誤差増幅
器１０の出力電圧を入力し前記の誤差電圧が０となるよ
うに（換言すれば充電出力電流ＩO が一定となるよう
に）、スイッチング素子５のスイッチングのオン／オフ
比を可変制御するスイッチング制御回路である。Reference numeral 6 is a rectifier for rectifying the AC voltage of the secondary winding 4b of the transformer 4, 7 is a smoothing circuit for smoothing the rectified DC voltage, 8 is a battery as a load to be charged,
Reference numeral 9 is a current detection resistor for detecting the charging output current I O to the battery 8, and 10 is a current detection signal 9a as a detection voltage of the current detection resistor 9 and the reference voltage 11 are compared, and the error voltage is amplified. The current error amplifier 12 inputs the output voltage of the current error amplifier 10 and turns on the switching of the switching element 5 so that the error voltage becomes 0 (in other words, the charging output current I O becomes constant). It is a switching control circuit that variably controls the on / off ratio.
【０００４】また１３は、この装置の温度上昇を安全規
格内に納めるために、スイッチングトランス４の温度を
検出する温度センサで、スイッチング制御回路１２は温
度センサ１３の温度検出信号を入力し、スイッチングト
ランス４の温度がある設定温度に達したことを判別する
と、図３に示すように出力電流ＩO をより低い出力電流
ＩO1に切り換える。このため出力電流ＩO は同図の様
に、ステップ的に変化する。Further, 13 is a temperature sensor for detecting the temperature of the switching transformer 4 in order to keep the temperature rise of this device within the safety standard, and the switching control circuit 12 inputs the temperature detection signal of the temperature sensor 13 to perform switching. When it is determined that you have reached the set temperature with the temperature of the transformer 4 is switched to the output current I O1 output current I O lower as shown in FIG. Therefore, the output current I O changes stepwise as shown in FIG.
【０００５】[0005]
【発明が解決しようとする課題】電圧の異なるバッテリ
を定電流で充電する場合、一般に高電圧バッテリ（例え
ば１２Ｖバッテリ）よりも低電圧バッテリ（例えば７．
２Ｖバッテリ）を充電する場合の方が扱う電力が小さく
（具体的には平均的な１次電流が小さい）、結果として
スイッチングトランス４の損失も低電圧バッテリの方か
小さく、トランス４の温度上昇も小さい。When charging batteries having different voltages with a constant current, a low voltage battery (for example, 7.V) is generally used rather than a high voltage battery (for example, 12.V battery).
When charging a 2V battery, the electric power handled is smaller (specifically, the average primary current is smaller), and as a result, the loss of the switching transformer 4 is smaller than that of the low-voltage battery, and the temperature rise of the transformer 4 occurs. Is also small.
【０００６】このため、従来方式では高電圧バッテリに
より出力電流ＩO を設定するため、この電流ＩO で低電
圧バッテリを連続充電する場合、図３に示す様に、電流
ＩO1に切り換えるまでの時間は延びるものの、切り換え
た電流ＩO1が高電圧バッテリの場合と同じであり、これ
は必要以上の電流減少となり、充電時間が延びるという
欠点があった。Therefore, in the conventional method, the output current I O is set by the high-voltage battery. Therefore, when the low-voltage battery is continuously charged by this current I O , the current I O is switched to the current I O1 , as shown in FIG. Although the time is extended, the switched current I O1 is the same as in the case of the high voltage battery, which results in an unnecessarily large decrease in current and a drawback that the charging time is extended.
【０００７】そこで本発明は、スイッチングトランスの
温度に応じた充電電流の制御は行うものの低電圧バッテ
リの充電時間の増加を防ぐことができるようなバッテリ
充電装置を提供することを課題とする。Therefore, an object of the present invention is to provide a battery charger which can control the charging current according to the temperature of the switching transformer but can prevent the charging time of the low voltage battery from increasing.
【０００８】[0008]
【課題を解決するための手段】前記の課題を解決するた
めに請求項１のバッテリ充電装置は、高圧直流電源をス
イッチングトランス（４など）の１次巻線（４ａなど）
を経てスイッチング手段（スイッチング素子５など）を
介し繰返し開閉し、このときスイッチングトランスの２
次巻線（４ｂなど）に発生する電圧を（整流器６，平滑
回路７などを介し）整流し平滑化して低圧直流電源を作
りバッテリ（８など）を充電する装置であって、この装
置の充電出力電流（ＩO など）に比例する電圧としての
電流検出信号（９ａなど）を検出出力する手段（電流検
出抵抗９など）と、前記電流検出信号を基準電圧（１１
など）と比較し、この電流検出信号を一定とするように
前記スイッチング手段の開閉を制御する電流制御手段
（電流誤差増幅器１０，スイッチング制御回路１２な
ど）とを備えたバッテリ充電装置において、スイッチン
グトランスの温度が所定値を越えたときは、該温度と所
定値との差の大きさに応じて前記充電出力電流を低減す
る出力電流低減手段を備えたものとする。In order to solve the above-mentioned problems, the battery charger according to claim 1 uses a high voltage DC power supply for a primary winding (4a, etc.) of a switching transformer (4, etc.).
Through the switching means (switching element 5 etc.) repeatedly, and at this time, the switching transformer 2
A device for charging a battery (8, etc.) by rectifying and smoothing the voltage generated in the next winding (4b, etc.) (via a rectifier 6, a smoothing circuit 7, etc.) to create a low voltage DC power supply. A means (current detection resistor 9 or the like) for detecting and outputting a current detection signal (9a or the like) as a voltage proportional to the output current ( IO or the like), and the current detection signal as a reference voltage (11).
, Etc.) and a current control means (current error amplifier 10, switching control circuit 12, etc.) for controlling the opening and closing of the switching means so as to keep the current detection signal constant. When the temperature exceeds the predetermined value, output current reducing means for reducing the charging output current according to the magnitude of the difference between the temperature and the predetermined value is provided.
【０００９】また、請求項２のバッテリ充電装置では、
請求項１に記載のバッテリ充電装置において、前記出力
電流低減手段は、スイッチングトランスの温度の増減に
応じて増減する温度検出電圧（ＥT など）を検出出力す
る手段（サーミスタ２１，分圧抵抗２２など）と、この
温度検出電圧が前記スイッチングトランスの温度の前記
所定値以上の温度領域に対応する値となるとき、この温
度検出電圧と温度の前記所定値に対応する温度検出電圧
との差を増幅した所定極性（正極性など）の出力信号
（Ｅout など）を生成出力する増幅手段（温度信号増幅
器２４，温度基準電圧ＥR ，ダイオードＤ1 など）と、
この所定極性の出力信号を前記電流検出信号に対しこの
電流検出信号と同極性にして加算し、この加算された信
号を前記電流制御手段に前記電流検出信号に代えて与え
る手段（加算器２６など）とを備えたものであるように
する。Further, in the battery charger of claim 2,
In the battery charging apparatus according to claim 1, wherein the output current reducing means, means (thermistor 21 for detecting outputs a temperature detection voltage (such as E T) which increases or decreases according to the increase or decrease in the temperature of the switching transformer, voltage dividing resistors 22 Etc.) and the temperature detection voltage has a value corresponding to a temperature range of the temperature of the switching transformer or more, the difference between the temperature detection voltage and the temperature detection voltage corresponding to the predetermined value of the temperature. Amplification means (a temperature signal amplifier 24, a temperature reference voltage E R , a diode D 1 , etc.) for generating and outputting an amplified output signal (E out, etc.) of a predetermined polarity (such as positive polarity);
The output signal of the predetermined polarity is added to the current detection signal with the same polarity as the current detection signal and added, and the added signal is given to the current control means instead of the current detection signal (adder 26 or the like). ) And.
【００１０】また、請求項３のバッテリ充電装置では、
請求項１又は２に記載のバッテリ充電装置において、前
記高圧直流電源は商用交流電源（１など）を（整流器
２，平滑回路３などを介し）整流し平滑化して作られた
ものであり、このバッテリ充電装置は急速充電器である
ようにする。Further, in the battery charger of claim 3,
The battery charger according to claim 1 or 2, wherein the high-voltage DC power supply is made by rectifying and smoothing a commercial AC power supply (1 or the like) (via a rectifier 2, a smoothing circuit 3 or the like). The battery charger should be a fast charger.
【００１１】[0011]
【作用】スイッチングトランスの温度によって充電出力
電流を減少させる方法をステップ状に切り換える方式で
なく、スイッチングトランスの温度を制御回路にアナロ
グ的に加え、充電出力電流をスイッチングトランスの温
度上昇に対応して徐々に減少させる方式とすることで、
必要以上の充電出力電流減少を抑さえ、低電圧バッテリ
を連続充電する場合でも、必要以上に充電時間が延びる
のを防ぐ。[Operation] The method of reducing the charging output current according to the temperature of the switching transformer is not changed stepwise, but the temperature of the switching transformer is added to the control circuit in an analog manner, so that the charging output current corresponds to the temperature rise of the switching transformer. By gradually reducing the system,
Even if the charging output current is reduced more than necessary, the charging time is prevented from being extended more than necessary even when the low voltage battery is continuously charged.
【００１２】[0012]
【実施例】図１は本発明の実施例としてのブロック回路
図で図４に対応するものである。同図において２１はス
イッチングトランス４に取付けられ、その温度を検出す
るサーミスタ、２２は定電圧電源ＶCCとグランドＧＮＤ
間に、サーミスタ２１と直列に設けられて定電圧電源Ｖ
CCの電圧を分圧する分圧抵抗、２４はサーミスタ２１と
分圧抵抗２２との接続点ａの電圧としての温度検出電圧
ＥT と所定の温度基準電圧ＥR との差電圧を増幅する温
度信号増幅器、２６は電流検出信号９ａに温度信号増幅
器２４の出力電圧Ｅout を加算して電流誤差増幅器１０
に入力する加算器である。なお、Ｒ1 ，Ｒ2 は増幅器２
４のゲイン設定用の抵抗、Ｄ1 は増幅器２４の負の出力
を阻止するダイオードである。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block circuit diagram as an embodiment of the present invention and corresponds to FIG. In the figure, reference numeral 21 is a thermistor which is attached to the switching transformer 4 and detects its temperature, and 22 is a constant voltage power supply V CC and ground GND.
Between the thermistor 21 and the constant voltage power supply V
A voltage dividing resistor for dividing the voltage of CC , and 24 is a temperature signal for amplifying a difference voltage between the temperature detection voltage E T as a voltage at the connection point a between the thermistor 21 and the voltage dividing resistor 22 and a predetermined temperature reference voltage E R. An amplifier 26 adds the output voltage E out of the temperature signal amplifier 24 to the current detection signal 9a to add the current error amplifier 10
It is an adder that inputs to. In addition, R 1 and R 2 are amplifiers 2
The gain setting resistor of 4, D 1 is a diode that blocks the negative output of the amplifier 24.
【００１３】この温度信号増幅器２４の出力電圧Ｅout
と温度検出電圧ＥT および温度基準電圧ＥR との間に
は、次式（１）の関係が成立つ。The output voltage E out of the temperature signal amplifier 24
And the temperature detection voltage E T and the temperature reference voltage E R , the following equation (1) holds.
【００１４】[0014]
【数１】 Ｅout ＝（ＥT −ＥR ）（Ｒ2 ／Ｒ1 ）＋ＥT ＝ＥT （Ｒ1 ＋Ｒ2 ）／Ｒ1 −ＥR （Ｒ2 ／Ｒ1 ） （１） 従って温度検出電圧ＥT の値が小さく、次式（２）の値
に達する迄は出力電圧Ｅout は負であり、ダイオードＤ
1 に阻止されて加算器２６側には表れない。[Equation 1] E out = (E T −E R ) (R 2 / R 1 ) + E T = E T (R 1 + R 2 ) / R 1 −E R (R 2 / R 1 ) (1) Therefore temperature The value of the detection voltage E T is small, and the output voltage E out is negative until the value of the following expression (2) is reached, and the diode D
It is blocked by 1 and does not appear on the adder 26 side.
【００１５】[0015]
【数２】 ＥT ＝ＥR ・Ｒ2 ／（Ｒ1 ＋Ｒ2 ） （２） しかし温度検出電圧ＥT が（２）式の値を越えると、
（１）式のように温度検出電圧ＥT の増加分に比例する
増幅器出力電圧Ｅout が加算器２６によって加算され
る。[Equation 2] E T = E R · R 2 / (R 1 + R 2 ) (2) However, when the temperature detection voltage E T exceeds the value of the expression (2),
The amplifier output voltage E out proportional to the increase in the temperature detection voltage E T is added by the adder 26 as in the equation (1).
【００１６】図２は図１の回路に基づく充電出力電流対
時間の関係を示す特性図である。即ち充電開始後、スイ
ッチングトランス４の温度が上昇することによりサーミ
スタ２１の抵抗が減少し、温度検出電圧ＥT が上昇する
が、この電圧ＥT が（２）式の値に達する迄は前述のよ
うに温度信号増幅器２４の出力電圧Ｅout は、ダイオー
ドＤ1 に阻止されて電流誤差増幅器１０の動作とは無関
係であり、図３，４の場合と同様、出力電流ＩO を一定
とする定電流制御が行われる。FIG. 2 is a characteristic diagram showing the relationship between charging output current and time based on the circuit of FIG. That is, after the start of charging, the temperature of the switching transformer 4 rises, the resistance of the thermistor 21 decreases, and the temperature detection voltage E T rises. However, until the voltage E T reaches the value of the expression (2), As described above, the output voltage E out of the temperature signal amplifier 24 is irrelevant to the operation of the current error amplifier 10 because it is blocked by the diode D 1 , and the output current I O is kept constant as in the cases of FIGS. Current control is performed.
【００１７】トランス４の温度がさらに上昇して温度検
出電圧ＥT が（２）式の値を上回ると、（１）式に示す
温度信号増幅器２４の出力電圧Ｅout が加算器２６によ
って電流検出信号９ａに加算され、電流誤差増幅器１０
はこの加算信号を一定とするように出力電流ＩO を制御
する。従ってトランス４の温度の上昇と共に出力電流Ｉ
O が漸減し、やがてトランス４の温度上昇が止まると出
力電流ＩO も一定値に落着く。When the temperature of the transformer 4 further rises and the temperature detection voltage E T exceeds the value of the expression (2), the output voltage E out of the temperature signal amplifier 24 shown in the expression (1) is detected by the adder 26 as a current. The current error amplifier 10 is added to the signal 9a.
Controls the output current I O to a constant the sum signal. Therefore, as the temperature of the transformer 4 rises, the output current I
When O decreases gradually, and eventually the temperature rise of the transformer 4 stops, the output current I O also stabilizes at a constant value.
【００１８】この時、出力電流減少の方法以外の条件を
合わせれば、高電圧バッテリ充電の場合、図１の回路に
おいても図３と同様に出力電流ＩO がＩO1へと飽和する
ようにすることができる。しかし図１の回路で低電圧バ
ッテリを充電する場合、トランス４の損失（発熱）が高
電圧バッテリの場合より小さいため、充電開始後、温度
検出電圧ＥT が（２）式の値に達する時間が長くなり、
また出力電流ＩO が減少を開始したのちも、ＩO1より大
きい電流ＩO2へと飽和する。従って低電圧バッテリを充
電した場合、出力電流ＩO が従来のように必要以上に減
少することなく、バッテリの充電時間を短縮することが
できる。At this time, if conditions other than the method of reducing the output current are adjusted, in the case of charging the high voltage battery, the output current I O is saturated to I O1 in the circuit of FIG. 1 as in the case of FIG. be able to. However, when the low-voltage battery is charged by the circuit of FIG. 1, the loss (heat generation) of the transformer 4 is smaller than that of the high-voltage battery. Therefore, the time when the temperature detection voltage E T reaches the value of the expression (2) after the start of charging. Becomes longer,
Further, even after the output current I O starts to decrease, it is saturated with a current I O2 larger than I O1 . Therefore, when the low voltage battery is charged, the output current I O does not decrease more than necessary as in the conventional case, and the battery charging time can be shortened.
【００１９】[0019]
【発明の効果】本発明によればスイッチングトランスの
温度が所定温度を越えると、この温度の上昇に応じて充
電出力電流を減ずる制御を行うようにしたので、低電圧
バッテリを連続充電する場合、高電圧バッテリの充電に
比べてトランスの発熱が少なく、充電出力電流の減少制
御の際もその減少の程度が少ないので、従来のように必
要以上に充電出力電流を減少させることがなく充電時間
を短縮することができる。According to the present invention, when the temperature of the switching transformer exceeds a predetermined temperature, the control for reducing the charging output current according to the rise of this temperature is performed. Therefore, when continuously charging the low voltage battery, Compared to charging a high-voltage battery, less heat is generated in the transformer, and the degree of decrease in charging output current reduction control is also small, so charging time can be reduced without unnecessarily decreasing the charging output current as in the past. It can be shortened.
【図１】本発明の一実施例としての構成を示すブロック
回路図FIG. 1 is a block circuit diagram showing a configuration as an embodiment of the present invention.
【図２】図１の回路の充電時間に対する出力電流の推移
を示す特性図FIG. 2 is a characteristic diagram showing changes in output current with respect to charging time of the circuit of FIG.
【図３】図２に対応する従来回路の特性図FIG. 3 is a characteristic diagram of a conventional circuit corresponding to FIG.
【図４】図１に対応する従来の構成を示す回路図FIG. 4 is a circuit diagram showing a conventional configuration corresponding to FIG.
【符号の説明】 １ 交流電源 ２ 整流器 ３ 平滑回路 ４ スイッチングトランス ５ スイッチング素子 ６ 整流器 ７ 平滑回路 ８ バッテリ ９ 電流検出抵抗 １０ 電流誤差増幅器 １１ 基準電圧 １２ スイッチング制御回路 ２１ サーミスタ ２２ 分圧抵抗 ２４ 温度信号増幅器 ２６ 加算器 ＩO 充電出力電流 ＥT 温度検出電圧 ＥR 温度基準電圧 Ｅout 温度信号増幅器の出力電圧 Ｒ1 ，Ｒ2 温度信号増幅器のゲイン設定抵抗 Ｄ1 ダイオード[Description of symbols] 1 AC power supply 2 Rectifier 3 Smoothing circuit 4 Switching transformer 5 Switching element 6 Rectifier 7 Smoothing circuit 8 Battery 9 Current detection resistor 10 Current error amplifier 11 Reference voltage 12 Switching control circuit 21 Thermistor 22 Voltage dividing resistor 24 Temperature signal Amplifier 26 Adder I O Charge output current E T Temperature detection voltage E R Temperature reference voltage E out Temperature signal amplifier output voltage R 1 and R 2 Temperature signal amplifier gain setting resistor D 1 Diode
Claims (3)
次巻線を経てスイッチング手段を介し繰返し開閉し、こ
のときスイッチングトランスの２次巻線に発生する電圧
を整流し平滑化して低圧直流電源を作りバッテリを充電
する装置であって、 この装置の充電出力電流に比例する電圧としての電流検
出信号を検出出力する手段と、 前記電流検出信号を基準電圧と比較し、この電流検出信
号を一定とするように前記スイッチング手段の開閉を制
御する電流制御手段とを備えたバッテリ充電装置におい
て、 スイッチングトランスの温度が所定値を越えたときは、
該温度と所定値との差の大きさに応じて前記充電出力電
流を低減する出力電流低減手段を備えたことを特徴とす
るバッテリ充電装置。1. A high voltage DC power supply is a switching transformer.
A device for repeatedly opening and closing through a switching means through a secondary winding, rectifying and smoothing a voltage generated in a secondary winding of a switching transformer at this time to form a low-voltage DC power supply, and charging a battery. A means for detecting and outputting a current detection signal as a voltage proportional to the output current; and a current control means for comparing the current detection signal with a reference voltage and controlling the opening / closing of the switching means so as to keep the current detection signal constant. In a battery charger equipped with, when the temperature of the switching transformer exceeds a predetermined value,
A battery charging device comprising an output current reducing means for reducing the charging output current according to a magnitude of a difference between the temperature and a predetermined value.
て、 前記出力電流低減手段は、 スイッチングトランスの温度の増減に応じて増減する温
度検出電圧を検出出力する手段と、 この温度検出電圧が前記スイッチングトランスの温度の
前記所定値以上の温度領域に対応する値となるとき、こ
の温度検出電圧と温度の前記所定値に対応する温度検出
電圧との差を増幅した所定極性の出力信号を生成出力す
る増幅手段と、 この所定極性の出力信号を前記電流検出信号に対しこの
電流検出信号と同極性にして加算し、この加算された信
号を前記電流制御手段に前記電流検出信号に代えて与え
る手段とを備えたものであることを特徴とするバッテリ
充電装置。2. The battery charging device according to claim 1, wherein the output current reducing unit detects and outputs a temperature detection voltage that increases or decreases according to an increase or decrease in the temperature of the switching transformer, and the temperature detection voltage is the output voltage detecting unit. When the temperature of the switching transformer reaches a value corresponding to a temperature range equal to or higher than the predetermined value, an output signal having a predetermined polarity is generated and output by amplifying the difference between the temperature detection voltage and the temperature detection voltage corresponding to the predetermined value of the temperature. Means for adding the output signal of the predetermined polarity to the current detection signal in the same polarity as the current detection signal, and adding the added signal to the current control means instead of the current detection signal. A battery charging device comprising:
において、前記高圧直流電源は商用交流電源を整流し平
滑化して作られたものであり、このバッテリ充電装置は
急速充電器であることを特徴とするバッテリ充電装置。3. The battery charger according to claim 1 or 2, wherein the high-voltage DC power supply is made by rectifying and smoothing a commercial AC power supply, and the battery charging device is a quick charger. A battery charger characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21684194A JPH0884438A (en) | 1994-09-12 | 1994-09-12 | Battery charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21684194A JPH0884438A (en) | 1994-09-12 | 1994-09-12 | Battery charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0884438A true JPH0884438A (en) | 1996-03-26 |
Family
ID=16694746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21684194A Pending JPH0884438A (en) | 1994-09-12 | 1994-09-12 | Battery charger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0884438A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100453883B1 (en) * | 2002-04-16 | 2004-10-26 | 삼지전자 주식회사 | charge device of battery |
| US7061209B2 (en) | 2003-01-14 | 2006-06-13 | Makita Corporation | Battery chargers |
| WO2006101188A1 (en) * | 2005-03-24 | 2006-09-28 | Denso Corporation | Dc-dc convertir system |
| CN100458631C (en) * | 2005-03-25 | 2009-02-04 | 深圳斯贝克动力电子有限公司 | Method and apparatus for controlling temperature of heating element |
| US8203813B2 (en) | 2009-06-30 | 2012-06-19 | Fuji Electric Co., Ltd. | Distributed power supply system |
| CN111130348A (en) * | 2020-01-22 | 2020-05-08 | 深圳市新威尔电子有限公司 | Constant current changes constant voltage and does not have disturbance fast switch circuit |
| CN111934381A (en) * | 2020-08-10 | 2020-11-13 | 昂宝电子（上海）有限公司 | Power modulation circuit and method, PWM controller, fast charging protocol circuit and system |
-
1994
- 1994-09-12 JP JP21684194A patent/JPH0884438A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100453883B1 (en) * | 2002-04-16 | 2004-10-26 | 삼지전자 주식회사 | charge device of battery |
| US7061209B2 (en) | 2003-01-14 | 2006-06-13 | Makita Corporation | Battery chargers |
| US7675265B2 (en) | 2003-01-14 | 2010-03-09 | Makita Corporation | Battery charger capable of suppressing the temperature increase of the power source circuit |
| WO2006101188A1 (en) * | 2005-03-24 | 2006-09-28 | Denso Corporation | Dc-dc convertir system |
| CN100458631C (en) * | 2005-03-25 | 2009-02-04 | 深圳斯贝克动力电子有限公司 | Method and apparatus for controlling temperature of heating element |
| US8203813B2 (en) | 2009-06-30 | 2012-06-19 | Fuji Electric Co., Ltd. | Distributed power supply system |
| CN111130348A (en) * | 2020-01-22 | 2020-05-08 | 深圳市新威尔电子有限公司 | Constant current changes constant voltage and does not have disturbance fast switch circuit |
| CN111934381A (en) * | 2020-08-10 | 2020-11-13 | 昂宝电子（上海）有限公司 | Power modulation circuit and method, PWM controller, fast charging protocol circuit and system |
| CN111934381B (en) * | 2020-08-10 | 2024-04-12 | 昂宝电子（上海）有限公司 | Power modulation circuit and method, PWM controller, fast charge protocol circuit and system |
| US12348075B2 (en) | 2020-08-10 | 2025-07-01 | On-Bright Electronics (Shanghai) Co., Ltd. | Systems and methods for adjusting input power and/or output power of charging systems |
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