JP2939689B2 - Monitoring and control equipment for organic electrolyte secondary batteries and assembled batteries - Google Patents
Monitoring and control equipment for organic electrolyte secondary batteries and assembled batteriesInfo
- Publication number
- JP2939689B2 JP2939689B2 JP5081441A JP8144193A JP2939689B2 JP 2939689 B2 JP2939689 B2 JP 2939689B2 JP 5081441 A JP5081441 A JP 5081441A JP 8144193 A JP8144193 A JP 8144193A JP 2939689 B2 JP2939689 B2 JP 2939689B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- battery
- monitoring
- electrolyte secondary
- organic electrolyte
- 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.)
- Expired - Fee Related
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
Landscapes
- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は電気自動車用などの高電
圧で高信頼性かつ高安全性を要求される有機電解液二次
電池・組電池の監視・制御装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring / control apparatus for an organic electrolyte secondary battery / assembly battery for an electric vehicle or the like which requires high voltage, high reliability and high safety.
【０００２】[0002]
【従来の技術】従来の技術として、電池温度に応じて充
電電圧値を修正することにより電池が異常高温にさらさ
れることを防止できる充電装置の提案があった（特開平
２−２５４９３４号）。また、ニッケルカドミウム電池
パックに組み込まれたワンチップマイクロプロセッサに
より電池電圧、周囲温度、放電電流をチェックし電池パ
ックのロ−バッテリ−状態を検出する方式があった（特
開平２−２０１８７６号）。すなわち、充電では各種電
池の充電特性に応じて電池の種類で違った充電制御を行
う提案、放電では残存容量の検出・算出の提案があっ
た。従来は電池パック（組電池）の全体（総電圧、温
度）で制御するのが一般的で個々の単電池での制御は行
われていなかった。2. Description of the Related Art As a prior art, there has been proposed a charging device capable of preventing a battery from being exposed to an abnormally high temperature by correcting a charging voltage value in accordance with a battery temperature (Japanese Patent Application Laid-Open No. 2-254934). There has also been a method in which a battery voltage, an ambient temperature, and a discharge current are checked by a one-chip microprocessor incorporated in a nickel cadmium battery pack to detect a low battery state of the battery pack (Japanese Patent Laid-Open No. 2-201876). That is, in charging, there have been proposals for performing different charge control depending on the type of battery according to the charging characteristics of various batteries, and for discharging, there have been proposals for detecting and calculating the remaining capacity. Conventionally, control is generally performed on the entire battery pack (assembled battery) (total voltage and temperature), and control on individual cells has not been performed.
【０００３】[0003]
【発明が解決しようとする課題】有機電解液二次電池で
は有機溶媒の逸散および水分の侵入を防ぐために密閉電
池になっている。充電電圧が高くなると有機電解液が分
解してガスになり電池内圧が上昇し電池が破壊されると
いう問題があった。The organic electrolyte secondary battery is a sealed battery in order to prevent the escape of the organic solvent and the invasion of moisture. When the charging voltage is increased, there is a problem that the organic electrolyte is decomposed into gas to increase the internal pressure of the battery and destroy the battery.
【０００４】また、放電時、低い電圧で放電を続けて過
放電になると正極活物質にＬｉがド−プされすぎて、そ
の結晶構造が破壊されて以後容量が極端に低下し電池使
用が不可能になるという問題があった。過放電時に転極
すると電解液の分解などが起きて電池が危険な状態にな
る問題もあった。[0004] In addition, when discharging is continued at a low voltage and overdischarge occurs, Li is excessively doped into the positive electrode active material, and its crystal structure is destroyed. There was a problem that it became possible. If the polarity is reversed during overdischarge, there is also a problem that the electrolyte is decomposed and the battery is put in a dangerous state.
【０００５】[0005]
【課題を解決するための手段】本発明は２個以上の有機
電解液二次電池・単電池からなる組電池において、全部
の端子電圧を常時監視し、放電時単電池のいずれか一つ
の端子電圧が規定電圧（必要により放電電流値、温度に
よって補正する）以下になれば放電回路を切断し、充電
時単電池のいずれか一つの端子電圧が別の規定電圧以上
になれば充電回路を切断し、表示装置に少なくとも単電
池の最低端子電圧および最高端子電圧を表示させるマイ
クロプロセッサ回路を備えた組電池の監視・制御装置で
ある。SUMMARY OF THE INVENTION The present invention relates to a battery pack composed of two or more organic electrolyte secondary batteries and cells, in which all terminal voltages are constantly monitored and any one of the terminals of the cell is discharged. When the voltage falls below the specified voltage (corrected by the discharge current value and temperature if necessary), the discharge circuit is cut off, and when the terminal voltage of any one of the cells becomes higher than another specified voltage during charging, the charge circuit is cut off Further, the present invention relates to a battery pack monitoring / control device including a microprocessor circuit for displaying at least a minimum terminal voltage and a maximum terminal voltage of a unit cell on a display device.
【０００６】端子電圧情報および放電電流情報はＡ／Ｄ
変換器によってディジタル信号に変換しマイクロプロセ
ッサに伝える。放電温度特性デ−タはメモリ−に記憶さ
せておきマイクロプロセッサで放電電流情報に基づき放
電規定電圧を決定する。端子電圧情報と規定電圧情報と
を比較してマイクロプロセッサから回路切断信号を出
す。The terminal voltage information and the discharge current information are A / D
The signal is converted into a digital signal by a converter and transmitted to a microprocessor. Discharge temperature characteristic data is stored in a memory, and a microprocessor determines a discharge regulation voltage based on discharge current information. The terminal voltage information is compared with the specified voltage information, and a circuit disconnection signal is output from the microprocessor.
【０００７】突然、放電回路が切れると不都合な場合は
端子電圧が規定電圧に達した時、警告を出させ一定時間
後放電回路を切断させても良い。If it is not convenient to suddenly turn off the discharge circuit, a warning may be issued when the terminal voltage reaches the specified voltage, and the discharge circuit may be cut off after a certain period of time.
【０００８】温度センサ−を付け、メモリ−に記憶させ
た放電温度特性デ−タで補正した端子電圧値と放電電流
値から残存容量が得られる。The remaining capacity is obtained from the terminal voltage value and the discharge current value corrected by the discharge temperature characteristic data stored in the memory with the temperature sensor attached.
【０００９】なお、表示装置に単電池の最低端子電圧お
よび最高端子電圧以外に組電池の総電圧、残存容量、温
度などを表示させてもよい。The total voltage, remaining capacity, temperature, etc. of the assembled battery may be displayed on the display device in addition to the minimum terminal voltage and the maximum terminal voltage of the unit cell.
【００１０】[0010]
【作用】放電回路を切断する規定電圧は標準放電終止電
圧より低い値に設定する。したがって、単電池の容量が
そろっておれば、組電池の残存容量が０になっても放電
回路が切断されることはない。しかし、容量の少ない単
電池があると組電池としての容量が残っていても、容量
の少ない単電池が規定電圧以下になり、その後に全体の
放電回路が切断される。有機電解液二次電池では規定電
圧以下で放電し転極すると充電しても容量は回復せず電
池はほとんど破壊される。The specified voltage for disconnecting the discharge circuit is set to a value lower than the standard discharge end voltage. Therefore, as long as the cells have the same capacity, the discharge circuit will not be disconnected even if the remaining capacity of the battery pack becomes zero. However, if there is a unit cell with a small capacity, even if the capacity as a battery pack remains, the unit cell with a small capacity becomes lower than the specified voltage, and thereafter the entire discharge circuit is cut off. In an organic electrolyte secondary battery, the capacity is not restored even if the battery is discharged and reversed at a specified voltage or less, and the battery is almost destroyed.
【００１１】電気自動車では２００Ｖの高電圧が必要で
有機電解液二次電池でも単電池を５０個以上直列に接続
した組電池が必要になる。本発明では容量の少ない単電
池があっても、この電池は破壊されることなく容量の少
ないままで使用できる。An electric vehicle requires a high voltage of 200 V, and an organic electrolyte secondary battery requires an assembled battery in which 50 or more cells are connected in series. According to the present invention, even if there is a single battery having a small capacity, this battery can be used with a small capacity without being destroyed.
【００１２】有機電解液二次電池の充電器は総電圧、単
電池電圧および温度によって充電電圧および充電電流を
制御するが、充電器が故障したときなどの場合に単電池
に高電圧がかかることもあるので、充電器とは別系統で
単電池の端子電圧が規定電圧以上になれば充電回路を切
断するのがよい。A charger for an organic electrolyte secondary battery controls a charging voltage and a charging current according to a total voltage, a cell voltage and a temperature. However, a high voltage is applied to a cell when the charger is broken or the like. Therefore, it is preferable to disconnect the charging circuit when the terminal voltage of the unit cell becomes a specified voltage or more in a system different from the charger.
【００１３】[0013]
【実施例】本発明を図面を用いて説明する。図１は、本
発明の一実施例を示すマイクロプロセッサ回路の概念
図。図２は有機電解液二次電池・単電池の放電温度デ−
タ図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram of a microprocessor circuit showing one embodiment of the present invention. Fig. 2 shows the discharge temperature data of organic electrolyte secondary batteries and cells.
FIG.
【００１４】図中、１は組電池であって、複数の単電池
２よりなる。電池は有機電解液二次電池であり、その正
極活物質はLix NiO2 であり、負極は炭素材料である。
３は温度センサ−、４は負荷、５は充電器、６はＡ／Ｄ
変換器、７はマイクロプロセッサ、８はメモリ−、９は
表示装置である。１０は放電回路の切断スイッチであ
り、１１は充電回路の切断スイッチである。In the figure, reference numeral 1 denotes an assembled battery, which is composed of a plurality of cells 2. The battery is an organic electrolyte secondary battery, in which the positive electrode active material is Li x NiO 2 and the negative electrode is a carbon material.
3 is a temperature sensor, 4 is a load, 5 is a charger, 6 is A / D
A converter, 7 is a microprocessor, 8 is a memory, and 9 is a display device. Reference numeral 10 denotes a disconnection switch for the discharging circuit, and reference numeral 11 denotes a disconnection switch for the charging circuit.
【００１５】図２は単電池の放電温度特性デ−タであ
り、０．２５Ｃおよび１Ｃは放電率を表し、Ｃは公称容
量の電流単位（Ａ）であり、例えば１００Ａｈの電池を
１Ｃで放電することは１００Ａで放電することである。
規定電圧は図に示したように放電電流および温度によっ
て補正する。FIG. 2 shows discharge temperature characteristic data of a single cell, wherein 0.25C and 1C represent discharge rates, and C is a current unit (A) of a nominal capacity. For example, a 100Ah battery is discharged at 1C. What it does is to discharge at 100A.
The specified voltage is corrected by the discharge current and the temperature as shown in the figure.
【００１６】充電規定電圧は４．５Ｖでよい。The prescribed charging voltage may be 4.5V.
【００１７】[0017]
【発明の効果】本発明はマイクロプロセッサ回路により
有機電解液二次電池・単電池からなる組電池の単電池の
端子電圧を常時監視し、単電池の端子電圧が規定電圧以
下になれば放電回路をきり、規定電圧以上になれば充電
回路をきることにより、電池を破壊せず、安全に使用す
ることができる。また、残存容量を表示することも可能
で電池使用において便利である。According to the present invention, the terminal voltage of a unit cell of an assembled battery composed of an organic electrolyte secondary battery and a unit cell is constantly monitored by a microprocessor circuit, and when the terminal voltage of the unit cell falls below a specified voltage, a discharging circuit is provided. The battery can be safely used without breaking the battery by turning off the charging circuit when the voltage exceeds the specified voltage. It is also possible to display the remaining capacity, which is convenient when using batteries.
【図１】本発明の一実施例を示すマイクロプロセッサ回
路の概念図。FIG. 1 is a conceptual diagram of a microprocessor circuit showing one embodiment of the present invention.
【図２】有機電解液二次電池・単電池の放電温度デ−タ
図。FIG. 2 is a discharge temperature data diagram of an organic electrolyte secondary battery / cell.
１ 有機電解液二次電池の組電池 ２ 単電池 ７ マイクロプロセッサ １０ 放電回路切断スイッチ １１ 充電回路切断スイッチ REFERENCE SIGNS LIST 1 battery pack of organic electrolyte secondary battery 2 cell 7 microprocessor 10 discharge circuit disconnect switch 11 charge circuit disconnect switch
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−3462（ＪＰ，Ａ) 特開 平３−279883（ＪＰ，Ａ) 特開 平２−254934（ＪＰ，Ａ) 特開 平２−201876（ＪＰ，Ａ) 特開 昭62−180284（ＪＰ，Ａ) 特開 昭61−286773（ＪＰ，Ａ) 特開 昭58−97273（ＪＰ，Ａ) 特開 平５−38064（ＪＰ，Ａ) 特開 平５−111175（ＪＰ，Ａ) 実開 昭59−158276（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) G01R 31/36 H01M 10/42 H02J 7/00 H02J 7/02 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-3462 (JP, A) JP-A-3-279883 (JP, A) JP-A-2-254934 (JP, A) JP-A-2- 201876 (JP, A) JP-A-62-180284 (JP, A) JP-A-61-286773 (JP, A) JP-A-58-97273 (JP, A) JP-A-5-38064 (JP, A) JP-A-5-111175 (JP, A) JP-A-59-158276 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) G01R 31/36 H01M 10/42 H02J 7/00 H02J 7/02
Claims (2)
らなる組電池の監視・制御装置であって、 全単電池の端子電圧を常時監視する監視手段と、 放電時に単電池のいずれかひとつの端子電圧が規定電圧
以下になれば瞬時にあるいは一定時間経過後放電回路を
切断する放電回路切断手段と、 充電時に単電池のいずれかひとつの端子電圧が別の規定
電圧以上になれば充電回路を切断する充電回路切断手段
と、 表示装置に少なくとも単電池の最も低い電圧および最も
高い電圧を表示させる表示手段を備えたことを特徴とす
る有機電解液二次電池・組電池の監視・制御装置。1. An apparatus for monitoring and controlling a battery pack comprising at least two organic electrolyte secondary batteries and cells, comprising: monitoring means for constantly monitoring terminal voltages of all cells; Discharge circuit disconnecting means that disconnects the discharge circuit instantly or after a lapse of a certain time if any one terminal voltage falls below the specified voltage, and that any one terminal voltage of the cell can be higher than another specified voltage during charging Monitoring the organic electrolyte secondary battery / assembled battery, comprising: a charging circuit disconnecting means for disconnecting the charging circuit, and a display means for displaying at least the lowest voltage and the highest voltage of the unit cell on the display device. ·Control device.
び温度によって補正する補正手段を有することを特徴と
する請求項１記載の有機電解液二次電池・組電池の監視
・制御装置。2. The monitoring / control device for an organic electrolyte secondary battery / assembled battery according to claim 1, further comprising correction means for correcting a specified voltage value by a discharge current value flowing through the battery and a temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5081441A JP2939689B2 (en) | 1993-03-15 | 1993-03-15 | Monitoring and control equipment for organic electrolyte secondary batteries and assembled batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5081441A JP2939689B2 (en) | 1993-03-15 | 1993-03-15 | Monitoring and control equipment for organic electrolyte secondary batteries and assembled batteries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06265609A JPH06265609A (en) | 1994-09-22 |
| JP2939689B2 true JP2939689B2 (en) | 1999-08-25 |
Family
ID=13746488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5081441A Expired - Fee Related JP2939689B2 (en) | 1993-03-15 | 1993-03-15 | Monitoring and control equipment for organic electrolyte secondary batteries and assembled batteries |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2939689B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09140067A (en) * | 1995-11-15 | 1997-05-27 | Mitsumi Electric Co Ltd | Circuit for monitoring secondary battery |
| JPH10174297A (en) * | 1996-12-17 | 1998-06-26 | Yamaha Motor Co Ltd | Discharge control method for storage battery, and its device |
| US7081737B2 (en) | 2003-06-19 | 2006-07-25 | O2Micro International Limited | Battery cell monitoring and balancing circuit |
| JP5397985B2 (en) * | 2008-11-26 | 2014-01-22 | Ｎｅｃエナジーデバイス株式会社 | Secondary battery pack |
| US8872478B2 (en) | 2010-03-09 | 2014-10-28 | O2Micro Inc. | Circuit and method for balancing battery cells |
-
1993
- 1993-03-15 JP JP5081441A patent/JP2939689B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06265609A (en) | 1994-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2861879B2 (en) | Battery pack | |
| US5804944A (en) | Battery protection system and process for charging a battery | |
| US6819083B1 (en) | Dual use thermistor for battery cell thermal protection and battery pack overcharge/undercharge protection | |
| JP3618472B2 (en) | Battery unit and device using battery unit | |
| US6025699A (en) | Self discharge of batteries at high temperatures | |
| JP3219524B2 (en) | Overdischarge protection circuit for secondary battery | |
| JP2001157369A (en) | Method of controlling charging and discharging of battery | |
| JPH09117072A (en) | Protective circuit for secondary battery | |
| JP2002034166A (en) | Protective device for secondary battery | |
| JP2939689B2 (en) | Monitoring and control equipment for organic electrolyte secondary batteries and assembled batteries | |
| JP3721690B2 (en) | Secondary battery protection device | |
| JP3157687B2 (en) | Storage battery charge control device | |
| AU6533098A (en) | Apparatus for detecting cell reversal in rechargeable batteries | |
| JPH07105986A (en) | Battery pack | |
| JPH11234910A (en) | Method and apparatus for diagnosing fault in battery pack | |
| US6518728B2 (en) | Secondary battery device and method of protecting an overdischarge of the same | |
| JPH10290530A (en) | Secondary battery protective circuit | |
| JP3872134B2 (en) | Secondary battery protection device | |
| JP3420672B2 (en) | Secondary battery protection circuit | |
| JP3331200B2 (en) | Module battery protection device and power storage device | |
| JP3177405B2 (en) | Secondary battery charge / discharge control method and device | |
| JP3419122B2 (en) | Battery protection device | |
| JPH11346443A (en) | Controller of battery set for storage equipment | |
| JP2000295777A (en) | Battery equipment | |
| JP3492903B2 (en) | Lithium ion secondary battery charging system and charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |