JPH02246739A - Charging control circuit - Google Patents
Charging control circuitInfo
- Publication number
- JPH02246739A JPH02246739A JP6313889A JP6313889A JPH02246739A JP H02246739 A JPH02246739 A JP H02246739A JP 6313889 A JP6313889 A JP 6313889A JP 6313889 A JP6313889 A JP 6313889A JP H02246739 A JPH02246739 A JP H02246739A
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- temperature
- charging
- comparison
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 25
- 230000007257 malfunction Effects 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910003307 Ni-Cd Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［ｆＩｔ業上の利用分野１
本発明は、Ｎ ｉ −Ｃｄ電池のような２次電池の充電
状態を温度上昇率から検知して２次電池の充電制御を行
う充電制御回路に関するものである。Detailed Description of the Invention [Field of application in fIt industry 1] The present invention is a charging method that controls charging of a secondary battery by detecting the state of charge of a secondary battery such as a Ni-Cd battery from the rate of temperature rise. This relates to control circuits.
［従来の技術１
充電器では、商用電源をトランス等によって降圧した電
圧を整流平滑し、この整流平滑出力から定電流回路で定
電流を得て、この定電流をサイリスタやトランジスタ等
の充電電流制御素子を介して２次電池（以下、単に電池
と呼ぶ。）に供給して充電するようにしである。[Conventional technology 1] In a charger, the voltage of a commercial power supply is stepped down using a transformer, etc., and then rectified and smoothed, a constant current circuit obtains a constant current from the rectified and smoothed output, and this constant current is used to control the charging current of a thyristor, transistor, etc. The battery is supplied to a secondary battery (hereinafter simply referred to as a battery) via an element for charging.
電池を急速充電する場合の充電制御方式としては、電圧
検出方式（電圧ｌＴ１１御充電方式、−ａＶ制御充電方
式、■テーパ制御充電方式）、温度検出方式等があり、
１００％充電を達成するためには一般的に温度検出方式
が良いとされ、さらにこの温度検出方式の中でもＡＴ／
Δｔ（’ｒ：温度、を二時間）方式が特に良いとされて
いる。つまり、この７１１Ｔ／７！Ｉｔ方式の充電制御
回路では、電池の温度上昇を微分値でとらえるため、周
囲温度や電池温度に影響されずに電池８の充電状態を検
知でかるからである。なお、このＡＴ／７１ＩＬ方式の
充電制御回路に関する発明としては特開昭６２−１９３
５１８号公報に記載されたものがある。Charging control methods for rapidly charging batteries include voltage detection methods (voltage lT11 control charging method, -aV control charging method, taper control charging method), temperature detection method, etc.
In order to achieve 100% charging, the temperature detection method is generally considered to be better, and among these temperature detection methods, AT/
The Δt ('r: temperature, two hours) method is said to be particularly good. In other words, this 711T/7! This is because the It-type charging control circuit captures the temperature rise of the battery using a differential value, so the state of charge of the battery 8 can be detected without being affected by the ambient temperature or battery temperature. The invention related to this AT/71IL type charging control circuit is disclosed in Japanese Patent Application Laid-open No. 62-193.
There is one described in Publication No. 518.
【発明が解決しようとする課Ｍ１
しかしながら、このａＴ／１方式では温度センサの出力
にアマチュア無線等のノイズが重畳されると、誤ったＡ
Ｔ／７！ｌｔを検出してしまい、電池が１００％充電さ
れていないにもかかわらず充電を停止されてしまうとい
う問題があった。Problem to be solved by the invention M1 However, in this aT/1 method, if noise from amateur radio etc. is superimposed on the output of the temperature sensor, incorrect A
T/7! lt is detected, and charging is stopped even though the battery is not 100% charged.
本発明は上述の５点に鑑みて為されたものであり、その
目的とするところは、ノイズによる誤動作を起こさない
７！ＩＴ／Δを方式の充電制御回路を提供することにあ
る。The present invention has been made in view of the above five points, and its purpose is to prevent malfunctions caused by noise. An object of the present invention is to provide a charging control circuit based on the IT/Δ method.
［ａ題を解決するための手段ｌ
上記目的を達成するために、本発明は２次電池の温度を
検出する温度検出手段と、上記検出温度の上昇率を所定
時間毎に求める温度上昇率検出手段と、上記温度上昇率
を基準値と比較して温度上昇率が基準値以上になったこ
とを検知する比較手段と、この比較手段の基準値以上の
出力の継続時間が所定期間以上である場合に比較手段の
出力が適正な出力であると判断して２次電池の充電を停
止させる判別手段とを備えている。[Means for Solving Problem a] In order to achieve the above object, the present invention provides a temperature detection means for detecting the temperature of a secondary battery, and a temperature increase rate detection means for determining the increase rate of the detected temperature at every predetermined time. means, a comparison means for comparing the temperature increase rate with a reference value and detecting that the temperature increase rate has exceeded the reference value, and a duration of the output of the comparison means equal to or greater than the reference value for a predetermined period or more. and determining means for determining that the output of the comparing means is an appropriate output and stopping charging of the secondary battery.
［作用］
本発明は、上述のように比較手段の基準値以上の出力の
継続時間が所定期間以上である場合に比較手段の出力が
適正な出力であると判断して２次電池の充電を停止させ
る判別手段を備えることにより、比較手段の出力が適正
な出力であるかどうかを１１できるようにして、ノイズ
による誤動作を防止できるようにしたものである。[Function] As described above, the present invention determines that the output of the comparison means is an appropriate output when the duration of the output of the comparison means equal to or higher than the reference value is longer than a predetermined period, and charges the secondary battery. By providing a discriminating means for stopping the comparison means, it is possible to determine whether the output of the comparison means is an appropriate output, thereby making it possible to prevent malfunctions due to noise.
［実施例１１
第２図は充電器の回路構成を示す図であり、電源１から
の電圧をトランス等からなる降圧回路２で降圧し、この
降圧電圧を整流回路３で整流すると共に平滑回路４で平
滑し、上記整流平滑して得た直流電圧から定電流回路５
で定電流を作成し、この定電流をサイリスクやトランジ
スタ等の充電電流制御素子６を介して電池８に供給して
充電し、７ｊ１” ／ ａ を方式の充電制御回路７で
電池８の充電電気量を温度上昇の微分値でとらえて充電
電流制御１Ｘ子６を制御し、電池８の充電制御を行うよ
うにしである。[Embodiment 11] FIG. 2 is a diagram showing the circuit configuration of a charger, in which the voltage from a power source 1 is stepped down by a step-down circuit 2 consisting of a transformer, etc., this step-down voltage is rectified by a rectifier circuit 3, and a smoothing circuit 4 is used. from the DC voltage obtained by the rectification and smoothing described above to the constant current circuit 5.
This constant current is supplied to the battery 8 via a charging current control element 6 such as a cyrisk or a transistor to charge the battery 8, and the charging control circuit 7 of the method 7j1''/a controls the charging electricity of the battery 8. The charging current control 1X element 6 is controlled by controlling the charge current control 1X element 6 by taking the amount as a differential value of the temperature rise, and the charging of the battery 8 is controlled.
ところで、電池温度は第３図に示すように充電開始直後
から充電電気量が１００％になるまで殆ど上昇が見られ
ず、１００％を過ぎると急激に上昇する。そこで、７ｊ
Ｔ／７１Ｉｔ方式の充電制御回路７では温度上昇率（Ａ
′ｒ’／Ａｔ）が所定値以上になったときに電池８の充
電を停止するようにしである。By the way, as shown in FIG. 3, the battery temperature hardly increases from immediately after the start of charging until the amount of charged electricity reaches 100%, and then increases rapidly after 100%. Therefore, 7j
In the charging control circuit 7 of the T/71It method, the temperature rise rate (A
Charging of the battery 8 is stopped when the ratio 'r'/At) exceeds a predetermined value.
この充電制御回路７は、第１図に示すように、電池温度
に対応する電圧を出力する温度検出回路９と、この温度
検出回路９の出力をサンプル・ホールドするサンプル・
ホールド回路１０と、サンプル・ホールド回路１０で温
度検出回路９の出力を周期的にサンプル・ホールドする
ためのクロックを発生するクロック発生回路１１と、上
記温度検出回路９の出力とサンプル・ホールド回路１０
の出力とを減算する減算増幅回路１２と、基準電圧発生
回路１４で作成された基準電圧Ｖｒｅｆと減算増幅回路
１３の出力とを比較する比較回路１３と、上記減算増幅
回路１２の出力が基準電圧Ｖｒｅ「以上であるときの比
較回路１３の出力の継続時間をカウントするカウンタ１
５と、カウンタ１５のカウント値が判定値以上であると
き比較回路１３の出力が適正な出力であると１４Ｍする
判別回路１６と、この判別回路１６の出力をラッチする
ラッチ回路１７とで構成しである。As shown in FIG. 1, this charging control circuit 7 includes a temperature detection circuit 9 that outputs a voltage corresponding to the battery temperature, and a sample circuit that samples and holds the output of this temperature detection circuit 9.
a hold circuit 10; a clock generation circuit 11 that generates a clock for periodically sampling and holding the output of the temperature detection circuit 9 in the sample and hold circuit 10;
a subtraction amplifier circuit 12 that subtracts the output of the subtraction amplifier circuit 12; a comparison circuit 13 that compares the reference voltage Vref generated by the reference voltage generation circuit 14 with the output of the subtraction amplifier circuit 13; Counter 1 that counts the duration of the output of the comparator circuit 13 when Vre is greater than or equal to
5, a determination circuit 16 that determines that the output of the comparison circuit 13 is a proper output when the count value of the counter 15 is equal to or greater than the determination value, and a latch circuit 17 that latches the output of the determination circuit 16. It is.
以下、充電制御回路７の動作を説明する。第４図（ａ）
は電池８の充電状態を示し、同図（ｂ）に電池８の表面
温度を示す。この電池８の表面温度は電池８の表面に密
着して取り付けられた温度検出回路９の温度センサ（ダ
イオード）により検出し、この温度検出回路９では温度
センサにて検出した温度を電圧信号に変換して出力する
。この温度検出回路９の出力を第４図（ｅ）に示すクロ
ックに従ってサンプル・ホールド回路１０で周期的にサ
ンプル・ホールドし、このサンプル・ホールド回路１０
の出力を減算増幅回路１２で温度検出回路９の出力と減
算して電池８の所定時閏毎の温度上昇率を求める。つま
り、上記サンプル・ホールド回路１０で温度検出回路９
の出力をホールドしている間にも電池８の温度は上昇し
ており、このため温度検出回路９の出力電圧はサンプル
・ホールド回路１０のホールド期間ｔ１の闇も変化する
。従って、減算増幅回路１２の出力には第４図（ｄ）に
示す温度上昇率に相当する差電圧が生じる０例えば、サ
ンプル・ホールド回路１０のホールド電圧をＶＴＩとし
、温度検出回路９のホールド期間ｔ、の経過後の電圧を
ＶＴ２とすると、減算増幅回路１２の出力からはホール
ド期間１．の経過後に差電圧（４Ｖｖ＝ＶＴ２ ＶＴ
Ｉ）が得られるのである。そして、サンプル期間り、に
はサンプル・ホールド回路１０の出力と温度検出回路９
の出力とが一致するため、減算増幅回路１２の出力はＯ
ｖとなる。The operation of the charging control circuit 7 will be explained below. Figure 4(a)
indicates the state of charge of the battery 8, and FIG. 3(b) shows the surface temperature of the battery 8. The surface temperature of this battery 8 is detected by a temperature sensor (diode) of a temperature detection circuit 9 attached closely to the surface of the battery 8, and this temperature detection circuit 9 converts the temperature detected by the temperature sensor into a voltage signal. and output. The output of this temperature detection circuit 9 is periodically sampled and held in a sample and hold circuit 10 according to the clock shown in FIG.
The subtraction amplifier circuit 12 subtracts the output of the temperature detection circuit 9 from the output of the temperature detection circuit 9 to obtain the temperature rise rate of the battery 8 at each predetermined time leap. In other words, the sample/hold circuit 10 and the temperature detection circuit 9
The temperature of the battery 8 is rising even while the output of the sample-and-hold circuit 10 is being held, and therefore the output voltage of the temperature detection circuit 9 also changes during the hold period t1 of the sample-and-hold circuit 10. Therefore, a difference voltage corresponding to the temperature rise rate shown in FIG. 4(d) is generated at the output of the subtraction amplifier circuit 12. If the voltage after the elapse of t is VT2, then the output of the subtraction amplifier circuit 12 has a hold period of 1. After the elapse of the difference voltage (4Vv=VT2 VT
I) is obtained. During the sampling period, the output of the sample/hold circuit 10 and the temperature detection circuit 9 are
Since the output of the subtraction amplifier circuit 12 matches the output of O
It becomes v.
ここで、上記電池８の表面温度は上述したように１００
％近くまでは余り上昇しないので、減算増幅回路１２の
出力は小さく、比較回路１３の基準電圧Ｖｒｅｆを越え
ることはない。なお、このときの比較回路１３の出力は
第４図（ｅ）に示すようにハイレベルになるようにしで
ある。この比較回路１３の出力をカウントするカウンタ
１５は、比較回路１３の出力がローレベルである場合に
カウントを行うため、上述の場合のカウンタ１５のカウ
ント値は第４図（「）に示すように０であり、判別回路
１６の判定値ＣＴに達せず、この判別回路１６の出力は
第４図（ｇ）に示すようにローレベルであり、この判別
回路１６の出力はラッチ回路１７でラッチされ、このラ
ッチ回路１７によって充電電流制御素子６を介して電池
８に定電流を供給するように制御して電池８を充電する
。Here, the surface temperature of the battery 8 is 100% as described above.
%, the output of the subtraction amplifier circuit 12 is small and does not exceed the reference voltage Vref of the comparison circuit 13. Note that the output of the comparison circuit 13 at this time is set to a high level as shown in FIG. 4(e). The counter 15 that counts the output of the comparison circuit 13 counts when the output of the comparison circuit 13 is at a low level, so the count value of the counter 15 in the above case is as shown in FIG. 0, the judgment value CT of the discrimination circuit 16 is not reached, and the output of this discrimination circuit 16 is at a low level as shown in FIG. The latch circuit 17 controls to supply a constant current to the battery 8 via the charging current control element 6, thereby charging the battery 8.
その後、電池８が１００％近くまで充電されると、電池
８の温度が急激に上昇し、減算増幅回路１２の出力ａＶ
丁が比較回路１３の基準電圧Ｖｒｅｆを越えるため、比
較回路１３の出力がローレベルになる。この比較回路１
３のローレベル期間を適宜周期でカウンタ１５がカウン
トする。そして、このカウンタ１５のカウント値が判別
回路１６の判定値ＣＴ（比較回路１３の出力が適正な出
力であると判定する値）を越えると、この判別回路１６
の出力をラッチするラッチ回路１７によって充電電流制
御素子６を制御して電池８への充電を停止する。なお、
上記カウンタ１５のカウント値はクロック発生回路１１
のサンプル信号によってリセットするようにしである。After that, when the battery 8 is charged to nearly 100%, the temperature of the battery 8 rises rapidly, and the output aV of the subtraction amplifier circuit 12
Since the voltage exceeds the reference voltage Vref of the comparison circuit 13, the output of the comparison circuit 13 becomes low level. This comparison circuit 1
The counter 15 counts the 3 low level periods at appropriate intervals. When the count value of this counter 15 exceeds the judgment value CT of the discrimination circuit 16 (a value for judging that the output of the comparison circuit 13 is a proper output), this discrimination circuit 16
The charging current control element 6 is controlled by the latch circuit 17 that latches the output of the battery 8 to stop charging the battery 8. In addition,
The count value of the counter 15 is determined by the clock generation circuit 11.
This is done so that it is reset by the sample signal.
大に、温度検出回路９の温度センサの出力にアマチュア
無線等のノイズが重畳された場合について説明する。今
、ノイズ（但し、単発ノイズ）が重畳されると、第４図
（ｄ）に示すように温度検出回路９の出力にノイズによ
る出力電圧Ｎ１が瞬時的に現れる。この出力電圧Ｎ、が
基準電圧Ｖｒｅｆを越えた場合には、第４図（ｅ）に示
すように比較回路１３の出力が瞬時的にａ−レベルにな
る。従来の充電制御回路では比較回路１３の出力を直接
にラッチ回路１７でラッチしていたため、このような単
発ノイズによっても充電が停止される問題があった。し
かし、本実施例の場合には瞬時的に比較回路１３の出力
が瞬時的にローレベルになっても、カウンタ１５のカウ
ントはそれ以上に進まず、カウンタ１５のカウント値が
判定値ＣＴを越えないため、判別回路１６が比較回路１
３の出力を適正なものでないと判断して無視し、電池８
は充電状態に保たれる。従って、ノイズに−よる影響を
受けない。A case in which noise from amateur radio or the like is superimposed on the output of the temperature sensor of the temperature detection circuit 9 will be explained in detail. Now, when noise (single noise) is superimposed, an output voltage N1 due to the noise appears instantaneously at the output of the temperature detection circuit 9, as shown in FIG. 4(d). When this output voltage N exceeds the reference voltage Vref, the output of the comparison circuit 13 instantaneously becomes the a-level as shown in FIG. 4(e). In the conventional charging control circuit, the output of the comparator circuit 13 was directly latched by the latch circuit 17, so there was a problem that charging was stopped even by such a single noise. However, in the case of this embodiment, even if the output of the comparison circuit 13 instantaneously becomes a low level, the count of the counter 15 does not advance any further, and the count value of the counter 15 exceeds the judgment value CT. Therefore, the discrimination circuit 16 is the comparison circuit 1.
The output of battery 8 is judged to be inappropriate and ignored.
is kept charged. Therefore, it is not affected by noise.
［実施例２Ｊ
第５図に本発明の他の実施例を示す。第１の実施例では
、上述した単発的なノイズでなく周期的なノイズが重畳
されて、減算増幅回路１２の出ヵに第６図（ａ）に示す
ような電圧出力Ｎ２が現れた場合、比較回路１３の出力
が同図（ｂ）に示すようにハイ、ローレベルを繰り返し
、同図（ｅ）に示すようにカウンタ１５のカウント値が
判定値０丁を越えて判別回路１６の出力が同図（ｄ）に
示すように７）イレベルになり、電池８の充電が停止さ
れることが考えられる。そこで、このような誤動作を防
止するために、本実施例では第５図に示すように比１回
Ｍ１３の出力がハイレベルになったときにカウンタ１５
のカウント値をリセットするリセット回路１８を設けで
ある。つまり、第６図（ａ）に示すように比較回路１３
の出力がハイ、ローレベルとを繰り返した場合、比較回
路１３の出力がハイレベルになる毎にカウンタ１５のカ
ウント値をリセットするようにしである。このようにす
れば、比較回路１３の出力がローレベル状態を所定時間
保持しなければ、カウンタ１５のカウント値が判定値０
丁に達することはなく、従って上述のような周期的なノ
イズによって＃３誤動作を起こさない。[Example 2J FIG. 5 shows another example of the present invention. In the first embodiment, when periodic noise is superimposed instead of the above-mentioned one-shot noise, and a voltage output N2 as shown in FIG. 6(a) appears at the output of the subtraction amplifier circuit 12, The output of the comparator circuit 13 repeats high and low levels as shown in FIG. As shown in FIG. 7(d), it is conceivable that the battery 8 becomes 7) Elevated and charging of the battery 8 is stopped. Therefore, in order to prevent such malfunctions, in this embodiment, as shown in FIG. 5, when the output of M13 becomes high level once, the counter 15
A reset circuit 18 is provided to reset the count value of . In other words, as shown in FIG. 6(a), the comparison circuit 13
When the output of the comparator circuit 13 repeats high and low levels, the count value of the counter 15 is reset each time the output of the comparison circuit 13 becomes high level. In this way, if the output of the comparator circuit 13 does not maintain a low level state for a predetermined period of time, the count value of the counter 15 will change to the judgment value 0.
Therefore, #3 malfunction will not occur due to periodic noise as described above.
［発明の効果１
本発明は上述のように１．比較手段の基準値以上の出力
の継続時間が所定期間以上である場合に比較手段の出力
が適正な出力であると判断して２次電池の充電を停止さ
せる判別手段を備えているので、ノイズによる比較手段
の出力は判別手段で適正な出力でないと判断でき、この
ためノイズによって２次電池の充電が停止される誤動作
を防止できる効果がある。[Effects of the Invention 1] The present invention has the following advantages as described above. Since it is equipped with a determination means that determines that the output of the comparison means is an appropriate output and stops charging the secondary battery when the duration of the output of the comparison means that is equal to or higher than the reference value is longer than a predetermined period, noise can be reduced. The output of the comparing means can be determined by the determining means to be not an appropriate output, which has the effect of preventing malfunctions in which charging of the secondary battery is stopped due to noise.
第１図は本発明の一実施例の充電制御回路の回路構成を
示すブロック図、第２図は充電器の回路構成を示すブロ
ック図、第３図は電池の特性図、第４図は充電制御回路
の動作説明図、第５図は他の実施例の充電制御回路の回
路構成を示すブロック図、第り図は第１の実施例の改良
、煤の説明図である。
７は充電制御回路、８は２次電池、９は温度検出回路、
１０はサンプル・ホールド回路、１１はクロック発生回
路、１２は減算増幅回路、１３は比較回路、１４は基準
電圧発生回路、１５はカウンタ、１６は判別回路、１８
はリセット回路である。
代理人 弁理士 石 １）艮 七
第２図
第６図Figure 1 is a block diagram showing the circuit configuration of a charging control circuit according to an embodiment of the present invention, Figure 2 is a block diagram showing the circuit configuration of a charger, Figure 3 is a battery characteristic diagram, and Figure 4 is a charging control circuit. FIG. 5 is a block diagram showing the circuit configuration of the charging control circuit of another embodiment, and FIG. 5 is an improvement of the first embodiment, an explanatory diagram of soot. 7 is a charging control circuit, 8 is a secondary battery, 9 is a temperature detection circuit,
10 is a sample and hold circuit, 11 is a clock generation circuit, 12 is a subtraction amplifier circuit, 13 is a comparison circuit, 14 is a reference voltage generation circuit, 15 is a counter, 16 is a discrimination circuit, 18
is a reset circuit. Agent Patent Attorney Ishi 1) Ai Figure 7 Figure 2 Figure 6
Claims (3)
検出温度の上昇率を所定時間毎に求める温度上昇率検出
手段と、上記温度上昇率を基準値と比較して温度上昇率
が基準値以上になったことを検知する比較手段と、この
比較手段の基準値以上の出力の継続時間が所定期間以上
である場合に比較手段の出力が適正な出力であると判断
して２次電池の充電を停止させる判別手段とを備えた充
電制御回路。(1) Temperature detection means for detecting the temperature of the secondary battery; temperature increase rate detection means for determining the rate of increase in the detected temperature at predetermined time intervals; A comparison means detects that the output exceeds the reference value, and when the duration of the output of the comparison means exceeding the reference value is longer than a predetermined period, the output of the comparison means is determined to be an appropriate output and a secondary A charging control circuit comprising: a determining means for stopping charging of a battery.
圧を出力する温度検出回路と、この温度検出回路の出力
を周期的にサンプル・ホールドするサンプル・ホールド
回路と、上記温度検出回路の出力とサンプル・ホールド
回路の出力との減算を行い温度上昇率に相当する電圧信
号を所定時間毎に求める減算増幅回路と、この減算増幅
回路の出力を基準電圧と比較して温度上昇率が所定値以
上になったことを検知する比較回路と、温度上昇率が所
定値以上のときの比較回路の出力の継続時間をカウント
するカウンタと、カウンタのカウント値が判定値以上で
あるとき比較回路の出力が適正な出力であると判断して
２次電池の充電を停止させる判別回路とを備えた充電制
御回路。(2) A temperature detection circuit that detects the temperature of the secondary battery and outputs a voltage corresponding to this temperature, a sample and hold circuit that periodically samples and holds the output of this temperature detection circuit, and the above temperature detection circuit. A subtraction amplifier circuit calculates a voltage signal corresponding to the rate of temperature rise by subtracting the output of the sample-and-hold circuit from the output of the sample-and-hold circuit. A comparison circuit that detects when the temperature rise rate exceeds a predetermined value, a counter that counts the duration of the output of the comparison circuit when the temperature rise rate is greater than or equal to the predetermined value, and a comparison circuit that detects when the count value of the counter is greater than or equal to the judgment value. A charging control circuit comprising: a determination circuit that determines that the output is an appropriate output and stops charging the secondary battery.
の出力を検出してカウンタのカウント値をリセットする
リセット回路を設けた請求項２記載の充電制御回路。(3) The charging control circuit according to claim 2, further comprising a reset circuit that detects the output of the comparison circuit when the temperature increase rate becomes equal to or less than a predetermined value and resets the count value of the counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6313889A JPH02246739A (en) | 1989-03-15 | 1989-03-15 | Charging control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6313889A JPH02246739A (en) | 1989-03-15 | 1989-03-15 | Charging control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02246739A true JPH02246739A (en) | 1990-10-02 |
Family
ID=13220608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6313889A Pending JPH02246739A (en) | 1989-03-15 | 1989-03-15 | Charging control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02246739A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6114839A (en) * | 1997-11-20 | 2000-09-05 | Hitachi Koki Co., Ltd. | Battery charging apparatus with error detection |
| EP1701426A2 (en) | 2005-03-11 | 2006-09-13 | Hitachi Koki Co., Ltd. | Battery charger |
| DE19520619B4 (en) * | 1994-06-03 | 2007-05-16 | Hitachi Koki Kk | battery charger |
| US7439708B2 (en) | 2004-05-18 | 2008-10-21 | Hitachi Koki Co., Ltd. | Battery charger with control of two power supply circuits |
| WO2010074351A2 (en) | 2008-12-26 | 2010-07-01 | Hitachi Koki Co., Ltd. | Charging device |
| US7956575B2 (en) | 2006-04-28 | 2011-06-07 | Hitachi Koki Co., Ltd. | Charging device for battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62193518A (en) * | 1986-02-20 | 1987-08-25 | 松下電工株式会社 | Controller of charger |
-
1989
- 1989-03-15 JP JP6313889A patent/JPH02246739A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62193518A (en) * | 1986-02-20 | 1987-08-25 | 松下電工株式会社 | Controller of charger |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19520619B4 (en) * | 1994-06-03 | 2007-05-16 | Hitachi Koki Kk | battery charger |
| US6114839A (en) * | 1997-11-20 | 2000-09-05 | Hitachi Koki Co., Ltd. | Battery charging apparatus with error detection |
| DE19853631C2 (en) * | 1997-11-20 | 2002-09-12 | Hitachi Koki Kk | Battery charger with fault detection |
| US7439708B2 (en) | 2004-05-18 | 2008-10-21 | Hitachi Koki Co., Ltd. | Battery charger with control of two power supply circuits |
| EP1701426A2 (en) | 2005-03-11 | 2006-09-13 | Hitachi Koki Co., Ltd. | Battery charger |
| US7956575B2 (en) | 2006-04-28 | 2011-06-07 | Hitachi Koki Co., Ltd. | Charging device for battery |
| WO2010074351A2 (en) | 2008-12-26 | 2010-07-01 | Hitachi Koki Co., Ltd. | Charging device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6956750B1 (en) | Power converter controller having event generator for detection of events and generation of digital error | |
| US6949914B2 (en) | Charging apparatus | |
| US5198743A (en) | Battery charger with microprocessor control | |
| KR100286882B1 (en) | Battery Charging System with Algebraic Analog Digital Converter to Automatically Convert Analog Signals | |
| JP3161272B2 (en) | Battery charger | |
| US6208148B1 (en) | Battery charger | |
| JPH02246739A (en) | Charging control circuit | |
| US4290002A (en) | Method and apparatus for controlling battery recharging | |
| TW201720030A (en) | Switching mode power supplies with fast load-transient response | |
| JPH11271366A (en) | Apparatus for detecting voltage drop | |
| JPH06343233A (en) | Method and apparatus for charging secondary battery | |
| JP3444977B2 (en) | Charger and control method thereof | |
| JP3107605B2 (en) | Battery charger | |
| US6977825B2 (en) | Voltage regulator using a transimpedance block to measure output | |
| JP2621115B2 (en) | Charger control circuit | |
| JP2020028160A (en) | Power conversion device | |
| JPH09238431A (en) | Method of charging cell and charger | |
| JP2543465B2 (en) | Charger | |
| JPH04150734A (en) | Charging circuit for secondary battery | |
| JPH02101934A (en) | Charging apparatus | |
| JPH07222374A (en) | Charge controller and controlling method | |
| JP3298276B2 (en) | Battery charging apparatus and charging method | |
| JP2527395B2 (en) | Battery temperature detection method for charger | |
| JPH06327165A (en) | Charging control device of power supply apparatus | |
| JP2805732B2 (en) | Flash emission control device |