JPH03279883A - Overdischarge detecting device for battery on unmanned carriage - Google Patents
Overdischarge detecting device for battery on unmanned carriageInfo
- Publication number
- JPH03279883A JPH03279883A JP2078786A JP7878690A JPH03279883A JP H03279883 A JPH03279883 A JP H03279883A JP 2078786 A JP2078786 A JP 2078786A JP 7878690 A JP7878690 A JP 7878690A JP H03279883 A JPH03279883 A JP H03279883A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- voltage
- over
- cells
- discharge
- 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 abstract description 31
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 239000001257 hydrogen Substances 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野]
本発明は無人搬送車に搭載され、その駆動源として使用
されるバッテリーの過放電検知装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an over-discharge detection device for a battery mounted on an automatic guided vehicle and used as a driving source thereof.
[従来の技術]
従来のものは第2図に示すように、1台の無人搬送車に
搭載されるバッテリー↓は、n個のセル2 a +〜2
a、を直列に接続して組電池として構成されている。た
とえば、鉛蓄電池の場合は1セルが2■のため12個、
ニッケル・カドミウム蓄電池では1セルが1.2■のた
め20個を直列に接続し。[Prior art] As shown in Fig. 2, in the conventional technology, the battery mounted on one automatic guided vehicle has n cells 2a + to 2.
a, are connected in series to form an assembled battery. For example, in the case of a lead-acid battery, 1 cell is 2■, so there are 12 cells.
For nickel-cadmium storage batteries, each cell has a capacity of 1.2 µm, so 20 batteries are connected in series.
組電池としては夫々24Vとなるように接続して使用す
るようにしている。The assembled batteries are connected to each other so that the voltage is 24V.
一般に、バッテリーは放電終止電圧をすぎてさらに放電
を継続すると、端子電圧はOVとなり。Generally, when a battery continues to discharge beyond its discharge end voltage, the terminal voltage becomes OV.
ついに電圧は逆極性となり、水素、酸素等のガスを発生
し、バッテリーを損傷することになる。Eventually, the voltage will reverse polarity and generate gases such as hydrogen and oxygen, which will damage the battery.
このような状態になると、電解液が霧状となって周囲に
放出されるため1周囲の電装品等を損傷することになる
。このため、バッテリーを過放電にさせないようにする
ための過放電検知手段を備える必要がある。In such a state, the electrolyte becomes atomized and is released into the surroundings, damaging surrounding electrical equipment and the like. Therefore, it is necessary to provide over-discharge detection means to prevent the battery from over-discharging.
3はこの過放電検知手段としての電圧検出器で。3 is a voltage detector as this over-discharge detection means.
組電池としてのバッテリー1の端子電圧を検出するよう
に接続されている。It is connected to detect the terminal voltage of the battery 1 as an assembled battery.
そして、バッテリーの過放電検知は次のように行われる
。Then, over-discharge detection of the battery is performed as follows.
即ち1組電池となる各セルは特性が十分揃っているもの
とし、1セルのバッテリーの放電終止電圧を■、とする
と、過放電電圧■は
V = n X V w
となる。That is, it is assumed that each cell constituting one set of batteries has sufficiently uniform characteristics, and if the discharge end voltage of one cell battery is 2, then the overdischarge voltage 2 becomes V = n x V w .
ただし、nはセル数である。However, n is the number of cells.
全電圧が上記電圧■に達したとき、このバ・ンテリー1
は放電終了をして、警報を出したり、を源電圧をOFF
としていた。When the total voltage reaches the above voltage ■, this battery battery 1
ends the discharge, issues an alarm, or turns off the source voltage.
It was.
[発明が解決しようとする課題]
ところで、このように複数個のセルにより成る組電池の
場合、各セルの放電特性は一様でないのが実情であるた
め、たとえば、3個のセルについての放電特性を示すと
、第3図(イ)〜(ハ)に示すように、放電特性にばら
つきが見られる。[Problems to be Solved by the Invention] By the way, in the case of such an assembled battery consisting of a plurality of cells, the actual situation is that the discharge characteristics of each cell are not uniform. As shown in FIGS. 3(A) to 3(C), there are variations in the discharge characteristics.
したがって、このようなバッテリーを搭載された無人搬
送車の稼働中での状態企考察すると1時点1+において
、(ロ)または(ハ)に示すセルS2またはS、はまだ
放電可能であるが、(イ)に示すセルS1は放電終了電
圧を越え、過放電状態となっており、この才ま放置する
と転極によって水素ガスを発生することになるため危険
である。Therefore, considering the operating state of an automatic guided vehicle equipped with such a battery, at one time point 1+, cell S2 or S shown in (b) or (c) can still be discharged, but ( The cell S1 shown in (a) has exceeded the discharge end voltage and is in an overdischarge state, and if left until this point, it is dangerous because hydrogen gas will be generated due to polarity reversal.
なお、バッテリーの放tt圧は放電するに従って、その
値が低下してゆき、また、その特性は温度、放電電流、
連続使用か断続使用か等の使用形態により変動するから
、放電終止電圧を正確に決定することは困難であった。The discharge tt pressure of a battery decreases as it discharges, and its characteristics vary depending on temperature, discharge current,
It has been difficult to accurately determine the discharge end voltage because it varies depending on the mode of use, such as continuous use or intermittent use.
即ち、従来のものでは、!圧検出器3はバッテリーの全
電圧を監視し、その値が異常状態となったとき検出する
ものであったから、バッテリー1を構成する複数個のセ
ルの一部たとえば、1個または2個のセルが過放電で水
素ガスを発生するといった初期の段階では、その異常状
態を検出できず、多くのセルが過放電となって始めて検
出することになるため、前記した異常事態にまで放置さ
れるという問題点があった。In other words, with the conventional one! The pressure detector 3 monitors the total voltage of the battery and detects when the value becomes abnormal. At the initial stage when cells generate hydrogen gas due to overdischarge, the abnormal condition cannot be detected and is detected only after many cells are overdischarged, leaving the abnormality as described above unresolved. There was a problem.
本発明は従来の上記課題(問題点)を解決するようにし
た無人搬送車のバッテリーの過放電検知装置を提供する
ことを目的とする。An object of the present invention is to provide an over-discharge detection device for a battery of an automatic guided vehicle, which solves the above-mentioned conventional problems.
[課題を解決するための手段]
本発明は無人搬送車に搭載され、駆動源として使用され
るバッテリーを構成する複数個のセルの最小単位毎に電
圧検出をする電圧検出手段を設け。[Means for Solving the Problems] The present invention includes a voltage detection means for detecting voltage for each minimum unit of a plurality of cells that constitute a battery that is mounted on an automatic guided vehicle and used as a drive source.
これらの電圧検出手段のいずれか1つが所定電圧以下の
値となったことを検出することにより、バッテリーの過
放電を検知するようにした無人搬送車のバッテリーの過
放電検知装置に関する。The present invention relates to an over-discharge detection device for a battery of an automatic guided vehicle, which detects over-discharge of a battery by detecting that any one of these voltage detection means has a value equal to or lower than a predetermined voltage.
この場合、複数個のセルの最小単位として各セル1個ず
つとしたもの用いるようにした無人搬送車のバッテリー
の過放電検知装置とすることが望ましい。In this case, it is desirable to provide an over-discharge detection device for a battery of an automatic guided vehicle that uses one cell for each cell as the minimum unit of a plurality of cells.
また、複数個のセルの最小単位として各セル2個または
3個ずつのセルを直列接続したものを用いるようにした
無人搬送車のバッテリーの過放電検知装置とするように
しても良い。Further, the over-discharge detection device for a battery of an automatic guided vehicle may use a plurality of cells each having two or three cells connected in series as the minimum unit.
また、電圧検出手段に代え、極性検出手段を設けるよう
にした無人搬送車のバッテリーの過放電検知装置とする
ようにしても良い。Further, the over-discharge detection device for a battery of an automatic guided vehicle may be provided with a polarity detection means instead of the voltage detection means.
さらに、過放電検知信号に基づいて、バッテリと負荷と
の電路に挿入される電源スイッチを自動的に遮断するよ
うにした過放電検知装置とすることが望ましい。Furthermore, it is desirable that the over-discharge detection device automatically shuts off a power switch inserted into the electrical circuit between the battery and the load based on the over-discharge detection signal.
[実施例]
以下第1図に示す一実施例により本発明を具体的に説明
する。[Example] The present invention will be specifically described below with reference to an example shown in FIG.
なお、同図において従来のものと対応するらのについて
は第2図のものと同一の符号を付して示した。Incidentally, in the figure, the same reference numerals as in FIG. 2 are given to the parts corresponding to the conventional ones.
4a+〜4 a nは夫々バッテリー1を構成する各セ
ル2a+〜2 a n毎にそれらの端子電圧を検出する
ために設けたn個の電圧検出器で、所定電圧以上のとき
は[0]を、また所定電圧以下の値に低下したときは検
出出力[1]を出すものである。4a+ to 4a n are n voltage detectors provided for each of the cells 2a+ to 2a n constituting the battery 1, respectively, to detect their terminal voltages, and when the voltage is higher than a predetermined voltage, [0] is set. , and outputs a detection output [1] when the voltage drops to a value below a predetermined voltage.
5は各電圧検出器4 a +〜4 a Rの出力を入力
とするOR素子である。Reference numeral 5 denotes an OR element that receives the outputs of the voltage detectors 4 a + to 4 a R as inputs.
6はOR素子5の出力により作動する警報器である。な
お、上記の電圧検出器4a+〜J a nの代わりに、
極性検出器を設け、各セル2a+〜2 a hの端子電
圧の極性を検出し、たとえば、極性が正常のときは[0
]を、極性が反転しているときは[1]を出し、この信
号をOR素子5に送るようにしても良い。6 is an alarm activated by the output of the OR element 5. Note that instead of the voltage detectors 4a+ to J a n described above,
A polarity detector is provided to detect the polarity of the terminal voltage of each cell 2a+ to 2ah. For example, when the polarity is normal, [0
], and when the polarity is reversed, [1] may be output, and this signal may be sent to the OR element 5.
また、電圧検出器または極性検出器のどちらを用いる場
合でも7本実施例に示したように各セル毎に1個ずつ設
けるのが望ましいが、これに代え2個または3個のセル
を直列接続した分与に各1個の電圧検出器または極性検
出器を設けるようにしても良い。In addition, regardless of whether a voltage detector or a polarity detector is used, it is preferable to provide one for each cell as shown in this embodiment, but instead of this, two or three cells may be connected in series. A voltage or polarity detector may be provided for each distribution.
なお、警報器6を設けて警報する代わりにOR素子5の
出力に基づいて1バツテリー1と負荷との電路に挿入さ
れる電源スイッチ(図示せず)を自動的に遮断するよう
にすることが望ましい。Note that instead of providing an alarm 6 to issue an alarm, a power switch (not shown) inserted into the electrical circuit between the battery 1 and the load may be automatically shut off based on the output of the OR element 5. desirable.
[作用]
本発明のものでは、無人搬送車に搭載され、駆動源とし
て使用されるバッテリーが前述したような理由により過
負荷となり1組電池を構成するセルの1つ、たとえば、
セル2a2が過放電状態となり1次いで、転極して水素
ガスを出すような事態となったときは、この両端電圧が
電圧検出器4a、により検出されるため、その異常状態
を示す出力[1]をOR素子5に送るので、OR素子5
は直ちに出力[1〕を出し、警報器6を作動し。[Function] In the present invention, the battery mounted on the automatic guided vehicle and used as a driving source becomes overloaded due to the reasons described above, and one of the cells constituting one set of batteries, for example,
When the cell 2a2 becomes over-discharged and then reverses polarity and emits hydrogen gas, the voltage across the cell 2a2 is detected by the voltage detector 4a, so the output [1] indicating the abnormal state is detected. ] is sent to OR element 5, so OR element 5
immediately outputs output [1] and activates alarm 6.
過放電を告知する警報を出す。Issues an alarm to notify of overdischarge.
これは電圧検出器が極性検出器に代替されているときも
全く同様であって、この場合にはセル2azの転極を極
性検出器が検出して、OR素子5を介して警報器6を作
動することになる。This is exactly the same when the voltage detector is replaced by a polarity detector. In this case, the polarity detector detects the polarity change of the cell 2az and sends the alarm 6 via the OR element 5. It will work.
したがって1作業員はこの警報によってバッテリー電源
を負荷から切り離しこれ以上の過放電を防止する。Therefore, one worker uses this alarm to disconnect the battery power source from the load to prevent further overdischarge.
なお、前記のようにOR素子の出力により電源スイッチ
を操作するようにしておけば、過放電検知と共に電路は
自動的に遮断される。Incidentally, if the power switch is operated by the output of the OR element as described above, the electric circuit is automatically cut off when overdischarge is detected.
上記において、電圧検出器または極性検出器が2個また
は3個のセルをまとめた端子電圧を検出するように設け
である場合には、1個のセルよりは検出時期が遅れるが
、 2fliまたは3個目のセルの過放電の際に早期に
発見されるので、従来のもののように異常事態になる前
にバッテリーを過放電から保護できる。In the above, if the voltage detector or polarity detector is installed to detect the terminal voltage of two or three cells together, the detection time will be later than that of one cell, but 2fli or 3 Since over-discharge of the first cell is detected early, the battery can be protected from over-discharge before it becomes abnormal, unlike conventional systems.
[発明の効果]
本発明は上記のように無人搬送車のバッテリーを構成す
るセルの最小単位毎に電圧検出または極性検出の手段を
設けるようにした無人搬送車のバッテリーの過放電検知
装置に関するものであるから次のような優れた効果を有
する5
■バッテリーを構成するセルの1つまたは2つ等の最小
単位での過放電があったときは、直ちにこれを検出して
警報を出すかまたは直接電源スイッチを遮断できる。[Effects of the Invention] The present invention relates to an over-discharge detection device for a battery of an automatic guided vehicle in which a voltage detection or polarity detection means is provided for each minimum unit of cells constituting the battery of an automatic guided vehicle as described above. Therefore, it has the following excellent effects. 5. If there is an overdischarge in the smallest unit such as one or two of the cells that make up the battery, it will be detected immediately and an alarm will be issued or Can be cut off directly with the power switch.
■したがって、このようにバッテリーの最小単位のセル
の過放電の段階で異常状態は進展することなく防止でき
、よって水素ガスの大量の発生や酸霧、アルカリ霧発生
に至ることなく防止でき、バッテリーの寿命も従来より
は長寿命とすることができる。■Therefore, it is possible to prevent abnormal conditions from progressing during the overdischarge stage of the cells, which are the smallest unit of the battery, and therefore prevent the generation of large amounts of hydrogen gas, acid fog, and alkaline fog, and prevent the battery from becoming abnormal. The lifespan can also be made longer than conventional ones.
第1図は本発明の一実施例を示す接続図、第2図は従来
例を示す接続図である。
第3図はバッテリーの放電特性である。
1:バッテリ
a
〜2a、、ニセル
4
〜4 a7:
電圧検出器
または極性検出器
5 :
OR素子
6 :
警報器FIG. 1 is a connection diagram showing one embodiment of the present invention, and FIG. 2 is a connection diagram showing a conventional example. Figure 3 shows the discharge characteristics of the battery. 1: Battery a to 2a, Nicell 4 to 4 a7: Voltage detector or polarity detector 5: OR element 6: Alarm
Claims (1)
ッテリーを構成する複数個のセルの最小単位毎に電圧検
出をする電圧検出手段を設け、これらの電圧検出手段の
いずれか1つが所定電圧以下の値となったことを検出す
ることにより、バッテリーの過放電を検知するようにし
たことを特徴とする無人搬送車のバッテリーの過放電検
知装置。 2、複数個のセルの最小単位として各セル1個ずつとし
たもの用いるようにした請求項1記載の無人搬送車のバ
ッテリーの過放電検知装置。 3、複数個のセルの最小単位として各セル2個または3
個ずつのセルを直列接続したものを用いるようにした請
求項1記載の無人搬送車のバッテリーの過放電検知装置
。 4、電圧検出手段に代え、極性検出手段を設けるように
した請求項1〜3のいずれか記載の無人搬送車のバッテ
リーの過放電検知装置。 5、過放電検知信号に基づいて、バッテリーと負荷との
電路に挿入される電源スイッチを自動的に遮断するよう
にした請求項1〜4いずれか記載の過放電検知装置。[Scope of Claims] 1. Voltage detection means for detecting voltage in each minimum unit of a plurality of cells constituting a battery mounted on an automatic guided vehicle and used as a drive source is provided, and these voltage detection means 1. An over-discharge detection device for a battery of an automatic guided vehicle, characterized in that over-discharge of a battery is detected by detecting that one of the voltages has a value equal to or lower than a predetermined voltage. 2. The over-discharge detection device for a battery of an automatic guided vehicle according to claim 1, wherein one cell is used for each cell as the minimum unit of the plurality of cells. 3. 2 or 3 cells each as the minimum unit of multiple cells
2. The over-discharge detection device for a battery of an automatic guided vehicle according to claim 1, which uses a device in which individual cells are connected in series. 4. The over-discharge detection device for a battery of an automatic guided vehicle according to any one of claims 1 to 3, further comprising polarity detection means in place of the voltage detection means. 5. The over-discharge detection device according to any one of claims 1 to 4, wherein a power switch inserted into the electrical circuit between the battery and the load is automatically cut off based on the over-discharge detection signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2078786A JPH03279883A (en) | 1990-03-29 | 1990-03-29 | Overdischarge detecting device for battery on unmanned carriage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2078786A JPH03279883A (en) | 1990-03-29 | 1990-03-29 | Overdischarge detecting device for battery on unmanned carriage |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03279883A true JPH03279883A (en) | 1991-12-11 |
Family
ID=13671568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2078786A Pending JPH03279883A (en) | 1990-03-29 | 1990-03-29 | Overdischarge detecting device for battery on unmanned carriage |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03279883A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008053221A (en) * | 2006-07-28 | 2008-03-06 | Matsushita Electric Ind Co Ltd | Electric device and battery pack |
WO2014021381A1 (en) * | 2012-08-02 | 2014-02-06 | 日産自動車株式会社 | Charging management system for unpiloted conveyance vehicles and charging management method for unpiloted conveyance vehicles |
WO2014021364A1 (en) * | 2012-08-02 | 2014-02-06 | 日産自動車株式会社 | Charging management system for unpiloted conveyance vehicle |
WO2014021412A1 (en) * | 2012-08-02 | 2014-02-06 | 日産自動車株式会社 | Charging management system for unpiloted conveyance vehicles |
JP2014082921A (en) * | 2012-09-27 | 2014-05-08 | Nakanishi Metal Works Co Ltd | Self-propelled conveyance system having capacitor and secondary battery as power supply |
CN108919132A (en) * | 2018-07-17 | 2018-11-30 | 深圳市道通智能航空技术有限公司 | Track method and apparatus, chip, battery and the aircraft of battery over-discharge |
-
1990
- 1990-03-29 JP JP2078786A patent/JPH03279883A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008053221A (en) * | 2006-07-28 | 2008-03-06 | Matsushita Electric Ind Co Ltd | Electric device and battery pack |
WO2014021381A1 (en) * | 2012-08-02 | 2014-02-06 | 日産自動車株式会社 | Charging management system for unpiloted conveyance vehicles and charging management method for unpiloted conveyance vehicles |
WO2014021364A1 (en) * | 2012-08-02 | 2014-02-06 | 日産自動車株式会社 | Charging management system for unpiloted conveyance vehicle |
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JPWO2014021412A1 (en) * | 2012-08-02 | 2016-07-21 | 日産自動車株式会社 | Charge management system for automated guided vehicles |
JP2014082921A (en) * | 2012-09-27 | 2014-05-08 | Nakanishi Metal Works Co Ltd | Self-propelled conveyance system having capacitor and secondary battery as power supply |
CN108919132A (en) * | 2018-07-17 | 2018-11-30 | 深圳市道通智能航空技术有限公司 | Track method and apparatus, chip, battery and the aircraft of battery over-discharge |
CN108919132B (en) * | 2018-07-17 | 2020-04-14 | 深圳市道通智能航空技术有限公司 | Method and device for tracking overdischarge of battery, chip, battery and aircraft |
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