JPH0686469A - Battery charging circuit - Google Patents
Battery charging circuitInfo
- Publication number
- JPH0686469A JPH0686469A JP3154329A JP15432991A JPH0686469A JP H0686469 A JPH0686469 A JP H0686469A JP 3154329 A JP3154329 A JP 3154329A JP 15432991 A JP15432991 A JP 15432991A JP H0686469 A JPH0686469 A JP H0686469A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- circuit
- short
- voltage
- short circuit
- 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
Landscapes
- Tests Of Electric Status Of Batteries (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電池に関し、特に、充
電可能な二次電池の充電回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery, and more particularly to a charging circuit for a rechargeable secondary battery.
【０００２】[0002]
【従来の技術】従来、この種のバッテリ充電回路には図
４に示すような回路が使われていた。2. Description of the Related Art Conventionally, a circuit as shown in FIG. 4 has been used for this type of battery charging circuit.
【０００３】図４において、１はバッテリ、２はバッテ
リ充電電流制御回路、３はバッテリ過充電防止回路、４
はバッテリ過放電防止回路、５はバッテリ逆流防止回
路、６はバッテリ電圧低下検出回路をそれぞれ示してい
る。In FIG. 4, 1 is a battery, 2 is a battery charging current control circuit, 3 is a battery overcharge prevention circuit, and 4 is a battery overcharge prevention circuit.
Is a battery overdischarge prevention circuit, 5 is a battery backflow prevention circuit, and 6 is a battery voltage drop detection circuit.
【０００４】図５は図４に示す従来の充電回路の動作を
説明するためのバッテリの放電における電圧の推移を示
す図である。FIG. 5 is a diagram showing a voltage transition in discharging a battery for explaining the operation of the conventional charging circuit shown in FIG.
【０００５】従来の充電回路は、バッテリが放電をして
低下検出電圧を下回ると、バッテリ電圧低下検出回路６
はバッテリの残量が少ないことを知らせる低下警告信号
を発する。まず、バッテリが正常な場合には、図５の領
域Ａに示すように放電し、バッテリ電圧が低下検出電圧
を下回ると低下警告信号を発する（図５領域Ｄ）。ここ
で、バッテリが放電中（図５領域Ｂ）に短絡を起こした
場合にはバッテリ電圧はすぐに低下検出電圧を下回り、
バッテリ電圧低下検出回路６は低下警告信号を発する
（図５領域Ｅ）。In the conventional charging circuit, when the battery discharges and falls below the drop detection voltage, the battery drop detection circuit 6
Emits a low warning signal indicating that the battery is low. First, when the battery is normal, it is discharged as shown in area A of FIG. 5, and when the battery voltage falls below the drop detection voltage, a drop warning signal is issued (area D in FIG. 5). Here, when the battery is short-circuited during discharging (region B in FIG. 5), the battery voltage immediately falls below the drop detection voltage,
The battery voltage drop detection circuit 6 issues a drop warning signal (region E in FIG. 5).
【０００６】[0006]
【発明が解決しようとする課題】上述した従来のバッテ
リ充電回路は、バッテリが正常に作動している状態では
特に問題は起きなかった。しかしながら、バッテリの電
圧が低下した場合、それが短絡による電圧低下なのか、
単にバッテリが放電して容量が低下したのかを認識する
ことができず、期待するバッテリの能力が出ないまま、
バッテリを使用することになる。特にメモリバックアッ
プに使用するバッテリでは、最も重要なデータの保持機
能に支障をきたすことになる。The conventional battery charging circuit described above has no particular problem when the battery is operating normally. However, if the voltage of the battery drops, is it due to a short circuit?
It is not possible to recognize whether the battery has discharged and the capacity has decreased, and the expected battery capacity is not available,
You will be using a battery. In particular, the battery used for memory backup impairs the most important data retention function.
【０００７】また、バッテリが内部短絡したことを知ら
ずに充電を行うと、バッテリは内部短絡によって電圧が
下がっているために、正常時より大きな電流が流れてし
まう。これによって、充電回路の電流容量が不足してし
まい、充電回路に使用している部品から煙が出たり、火
を噴いたりするなど、安全面での問題が生じる。Further, if the battery is charged without knowing that the battery is internally short-circuited, the battery will have a voltage drop due to the internal short-circuit, and thus a larger current than normal will flow. As a result, the current capacity of the charging circuit becomes insufficient, which causes safety problems such as smoke and fire from parts used in the charging circuit.
【０００８】本発明は従来の上記実情に鑑みてなされた
ものであり、従って本発明の目的は、従来の技術に内在
する上記課題を解決することを可能とした新規なバッテ
リ充電回路を提供することにある。The present invention has been made in view of the above-mentioned conventional circumstances, and therefore an object of the present invention is to provide a novel battery charging circuit capable of solving the above problems inherent in the conventional art. Especially.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係るバッテリ充電回路は、バッテリの容量
低下を検出するバッテリ電圧低下検出回路と、バッテリ
が内部短絡したことを検出するバッテリ短絡検出回路
と、これら２つの回路にて発せられた信号によりバッテ
リの短絡を警告するバッテリ短絡警告発信回路とを備え
て構成される。To achieve the above object, a battery charging circuit according to the present invention comprises a battery voltage drop detecting circuit for detecting a battery capacity drop and a battery for detecting an internal short circuit of the battery. It comprises a short-circuit detection circuit and a battery short-circuit warning transmission circuit which warns of a short circuit of the battery by the signals issued by these two circuits.
【００１０】[0010]
【実施例】次に本発明をその好ましい一実施例について
図面を参照して具体的に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the accompanying drawings with reference to the accompanying drawings.
【００１１】図１は本発明の一実施例を示すブロック構
成図、図２は本発明を半導体ディスク装置に使用した場
合の応用例を示すブロック構成図、図３は本実施例の動
作を説明するためのバッテリの放電における電圧の推移
を示す図である。FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing an application example when the present invention is used in a semiconductor disk device, and FIG. 3 is a diagram showing the operation of the present embodiment. FIG. 3 is a diagram showing a voltage transition in discharging a battery for charging.
【００１２】図１を参照するに、１はバッテリ、２はバ
ッテリ充電電流制御回路、３はバッテリ過充電防止回
路、４はバッテリ過放電防止回路、５はバッテリ逆流防
止回路、６はバッテリ電圧低下検出回路、７はバッテリ
短絡検出回路、８はバッテリ短絡警告発信回路をそれぞ
れ示す。Referring to FIG. 1, 1 is a battery, 2 is a battery charging current control circuit, 3 is a battery overcharge prevention circuit, 4 is a battery overdischarge prevention circuit, 5 is a battery backflow prevention circuit, and 6 is a battery voltage drop. A detection circuit, 7 is a battery short circuit detection circuit, and 8 is a battery short circuit warning transmission circuit.
【００１３】以下において、本発明の一実施例では、バ
ッテリにニッケルカドミウムバッテリ６本組のものにつ
いて説明する。In the following, in one embodiment of the present invention, a battery having six nickel-cadmium batteries will be described.
【００１４】まず、バッテリ低下検出電圧（以下、低下
電圧と称す）をバッテリ６本分の終止電圧に設定し、バ
ッテリ短絡検出電圧（以下、検出電圧と称す）をバッテ
リ６本の内１本が内部短絡した場合を想定し、バッテリ
５本分の電圧に設定する。First, the battery drop detection voltage (hereinafter, referred to as a drop voltage) is set to an end voltage for six batteries, and the battery short circuit detection voltage (hereinafter, referred to as a detection voltage) is set to one of the six batteries. Assuming an internal short circuit, set the voltage for five batteries.
【００１５】また、バッテリ短絡警告発信回路８では、
バッテリ電圧低下検出回路６から送られる低下警告信号
（以下、低下信号と称す）と、バッテリ短絡検出回路７
から送られる短絡警告信号（以下、短絡信号と称す）と
の論理積で短絡警告信号（以下、警告信号と称す）を発
信する。Further, in the battery short circuit warning transmission circuit 8,
A drop warning signal (hereinafter referred to as a drop signal) sent from the battery voltage drop detection circuit 6 and a battery short circuit detection circuit 7
A short-circuit warning signal (hereinafter referred to as a warning signal) is transmitted by a logical product of the short-circuit warning signal (hereinafter referred to as a short-circuit signal) sent from the device.
【００１６】バッテリ１が内部短絡していない正常な場
合には、図３のＡの領域に示すように放電しながら除々
に電圧は降下していく。さらに放電を続けると、バッテ
リ電圧は低下電圧より低くなり、バッテリ電圧低下検出
回路６は、低下警告信号を外部に発信すると同時に、バ
ッテリ短絡警告発信回路８へも送る。ここでは、バッテ
リ１は内部短絡を起こしていないので、バッテリ短絡検
出回路７は短絡信号を出していないので、バッテリ短絡
警告発信回路８は低下信号と短絡信号との論理積で警告
信号は発信しない（図３領域Ｄ）。さらに放電すると、
バッテリ過放電防止回路４の作動により、バッテリ１の
放電を停止してしまうので、図３に示すように電圧降下
は停止する。従って、バッテリ電圧は検出電圧までは降
下しないために、バッテリ短絡検出回路７は短絡信号を
発信せず、バッテリ短絡警告発信回路８は警告信号を発
信しない。In the normal case where the battery 1 is not internally short-circuited, the voltage gradually drops while discharging as shown in the area A of FIG. When the battery is further discharged, the battery voltage becomes lower than the drop voltage, and the battery voltage drop detection circuit 6 sends the drop warning signal to the outside and at the same time sends it to the battery short circuit warning sending circuit 8. Here, since the battery 1 does not cause an internal short circuit, the battery short circuit detection circuit 7 does not output a short circuit signal, so the battery short circuit warning transmission circuit 8 does not transmit a warning signal by the logical product of the low signal and the short circuit signal. (Figure 3, region D). When further discharged,
Since the discharge of the battery 1 is stopped by the operation of the battery overdischarge prevention circuit 4, the voltage drop is stopped as shown in FIG. Therefore, since the battery voltage does not drop to the detection voltage, the battery short circuit detection circuit 7 does not send a short circuit signal and the battery short circuit warning sending circuit 8 does not send a warning signal.
【００１７】そこで、６本のバッテリのうち１本でも途
中で内部短絡すると、図２領域Ｂに示すようにバッテリ
の電圧は内部短絡した本数分だけ落下して放電を続け
る。バッテリの電圧は内部短絡した分低くなっているた
めに、内部短絡した時点ですぐに低下電圧より低くな
り、バッテリ電圧低下検出回路６は低下信号を外部に出
すとともにバッテリ短絡警告発信回路８に送る。この時
点ではバッテリ短絡警告発信回路８は低下信号しか受け
ていないために警告信号は発信しない（図３領域Ｃ）。
さらに放電を続けると、バッテリの電圧は検出電圧を下
回り、バッテリ短絡検出回路７はバッテリ短絡警告発信
回路８へ短絡信号を送る。バッテリ短絡警告発信回路８
は低下信号と短絡信号の両方の信号を受け取った時点で
外部に警告信号を発信する（図３領域Ｅ）。Therefore, if even one of the six batteries is internally short-circuited in the middle of the process, the voltage of the battery drops by the number of internally short-circuited and continues discharging as shown in region B of FIG. Since the voltage of the battery is lower by the amount of the internal short circuit, it immediately becomes lower than the drop voltage when the internal short circuit occurs, and the battery voltage drop detection circuit 6 sends a drop signal to the outside and sends it to the battery short circuit warning transmission circuit 8. . At this point in time, the battery short circuit warning transmitting circuit 8 receives only the drop signal and therefore does not transmit the warning signal (region C in FIG. 3).
When discharging is further continued, the voltage of the battery falls below the detection voltage, and the battery short circuit detection circuit 7 sends a short circuit signal to the battery short circuit warning transmission circuit 8. Battery short circuit warning transmission circuit 8
Sends a warning signal to the outside when it receives both the drop signal and the short circuit signal (region E in FIG. 3).
【００１８】図２は本発明を半導体ディスク装置に適用
した場合の応用例を示すブロック構成図である。FIG. 2 is a block diagram showing an application example when the present invention is applied to a semiconductor disk device.
【００１９】図２において、参照番号１４は図１にて説
明した本発明に係るバッテリ充電回路を示し、このバッ
テリ充電部１４は電源部１３とバッテリ部１５との間に
接続されている。尚、図２の参照番号９はアクセス制御
部、１０は半導体記憶素子部、１１は電源電圧監視部、
１２は電源切替部をそれぞれ示している。In FIG. 2, reference numeral 14 indicates the battery charging circuit according to the present invention described in FIG. 1, and the battery charging section 14 is connected between the power source section 13 and the battery section 15. In FIG. 2, reference numeral 9 is an access control unit, 10 is a semiconductor memory element unit, 11 is a power supply voltage monitoring unit,
Reference numerals 12 respectively denote power supply switching units.
【００２０】[0020]
【発明の効果】以上説明したように、本発明によれば、
バッテリの電圧降下が放電によるものか内部短絡による
ものかを確実に判断することができ、内部短絡を起こし
た場合にはこれを検出し、警告することにより、迅速な
保守作業への移行が可能となり、バッテリを使用するシ
ステムの信頼性、保守性を高めることができる。As described above, according to the present invention,
It is possible to reliably judge whether the voltage drop of the battery is due to discharge or due to an internal short-circuit, and if an internal short-circuit occurs, it is detected and a warning is given, enabling a quick transition to maintenance work. Therefore, the reliability and maintainability of the system using the battery can be improved.
【００２１】また、バッテリへの過大電流充電による充
電回路の部品の発煙、焼失、破裂、爆発などを未然に防
止することができ、安全性を向上させることができる。Further, it is possible to prevent smoking, burning, rupture, explosion, etc. of the parts of the charging circuit due to the overcurrent charging of the battery, and it is possible to improve the safety.
【図１】本発明の一実施例を示すブロック構成図であ
る。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】本発明を半導体ディスク装置に適用した場合の
応用例を示すブロック構成図である。FIG. 2 is a block configuration diagram showing an application example when the present invention is applied to a semiconductor disk device.
【図３】本発明の動作を説明するためのバッテリの放電
における電圧の推移を示す図である。FIG. 3 is a diagram showing a voltage transition in discharging a battery for explaining the operation of the present invention.
【図４】従来におけるバッテリ充電回路のブロック図で
ある。FIG. 4 is a block diagram of a conventional battery charging circuit.
【図５】図４に示す従来のバッテリ充電回路でのバッテ
リの放電における電圧の推移を示す図である。5 is a diagram showing a voltage transition in discharging a battery in the conventional battery charging circuit shown in FIG.
１…バッテリ ２…バッテリ充電電流制御回路 ３…バッテリ過充電防止回路 ４…バッテリ過放電防止回路 ５…バッテリ逆流防止回路 ６…バッテリ電圧低下検出回路 ７…バッテリ短絡検出回路 ８…バッテリ短絡警告発信回路 ９…アクセス制御部 １０…半導体記憶素子部 １１…電源電圧監視部 １２…電源切替部 １３…電源部 １４…バッテリ充電部 １５…バッテリ部 1 ... Battery 2 ... Battery charge current control circuit 3 ... Battery overcharge prevention circuit 4 ... Battery overdischarge prevention circuit 5 ... Battery backflow prevention circuit 6 ... Battery voltage drop detection circuit 7 ... Battery short circuit detection circuit 8 ... Battery short circuit warning transmission circuit 9 ... Access control section 10 ... Semiconductor memory element section 11 ... Power supply voltage monitoring section 12 ... Power supply switching section 13 ... Power supply section 14 ... Battery charging section 15 ... Battery section
Claims (2)
リ充電回路において、放電時のバッテリの放電による電
圧低下を検出するバッテリ電圧低下検出回路と、バッテ
リの内部短絡時の電圧を検出するバッテリ短絡検出回路
と、前記バッテリ電圧低下検出回路及びバッテリ短絡検
出回路にて発せられた信号によりバッテリの短絡を警告
するバッテリ短絡警告発信回路とを具備して構成される
ことを特徴とするバッテリ充電回路。1. A battery charging circuit for charging a rechargeable secondary battery, a battery voltage drop detecting circuit for detecting a voltage drop due to discharge of a battery at the time of discharging, and a battery for detecting voltage at an internal short circuit of the battery. A battery charging circuit comprising: a short circuit detection circuit; and a battery short circuit warning transmission circuit for warning a short circuit of a battery by a signal generated by the battery voltage drop detection circuit and the battery short circuit detection circuit. .
リ短絡検出回路とバッテリ短絡警告発信回路とを具備し
て構成される前記バッテリ充電回路を半導体ディスク装
置の電源部とバッテリ部との間に接続したことを更に特
徴とする請求項１に記載のバッテリ充電回路。2. The battery charging circuit, which comprises the battery voltage drop detection circuit, the battery short circuit detection circuit, and the battery short circuit warning transmission circuit, is connected between the power supply section and the battery section of the semiconductor disk device. The battery charging circuit according to claim 1, further comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3154329A JPH0686469A (en) | 1991-06-26 | 1991-06-26 | Battery charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3154329A JPH0686469A (en) | 1991-06-26 | 1991-06-26 | Battery charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0686469A true JPH0686469A (en) | 1994-03-25 |
Family
ID=15581770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3154329A Pending JPH0686469A (en) | 1991-06-26 | 1991-06-26 | Battery charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0686469A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5996920A (en) * | 1997-09-25 | 1999-12-07 | Daiwa Seiko, Inc. | Removable spool brake device mounted on a side plate in a double-bearing type fishing reel |
| US6661200B2 (en) | 2001-05-08 | 2003-12-09 | International Business Machines Corporation | Rechargeable power supply system and method of protection against abnormal charging |
| CN110780226A (en) * | 2018-07-30 | 2020-02-11 | 广州小鹏汽车科技有限公司 | Battery pack internal short circuit detection method and device and electric automobile |
-
1991
- 1991-06-26 JP JP3154329A patent/JPH0686469A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5996920A (en) * | 1997-09-25 | 1999-12-07 | Daiwa Seiko, Inc. | Removable spool brake device mounted on a side plate in a double-bearing type fishing reel |
| US6661200B2 (en) | 2001-05-08 | 2003-12-09 | International Business Machines Corporation | Rechargeable power supply system and method of protection against abnormal charging |
| CN110780226A (en) * | 2018-07-30 | 2020-02-11 | 广州小鹏汽车科技有限公司 | Battery pack internal short circuit detection method and device and electric automobile |
| CN110780226B (en) * | 2018-07-30 | 2021-12-07 | 广州小鹏汽车科技有限公司 | Battery pack internal short circuit detection method and device and electric automobile |
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