JP3500949B2 - Counting method of battery charge / discharge repetition count - Google Patents
Counting method of battery charge / discharge repetition countInfo
- Publication number
- JP3500949B2 JP3500949B2 JP03697598A JP3697598A JP3500949B2 JP 3500949 B2 JP3500949 B2 JP 3500949B2 JP 03697598 A JP03697598 A JP 03697598A JP 3697598 A JP3697598 A JP 3697598A JP 3500949 B2 JP3500949 B2 JP 3500949B2
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- charge
- battery
- discharge capacity
- 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.)
- 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
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- Secondary Cells (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、放電しうる残容量
など動作中の電池の状態を算出し、電池が装着される機
器本体のパワー管理等をする為に、装置本体に電池の状
態を示すデータを出力するバッテリーマネージメントユ
ニット（Ｂａｔｔｅｒｙ Ｍａｎａｇｅｍｅｎｔ Ｕｎ
ｉｔ、以下、ＢＭＵと称す）を有し、ノートパソコンや
電動ドライバー等のパワーツールからなる負荷に電源を
供給する電池の、充放電繰り返し回数の適切なカウント
演算方法に関するものである。
【０００２】
【従来の技術】近年、充放電繰り返し回数のカウント演
算方法は、ノートパソコン用電池パック等のＢＭＵの重
要な機能として、電池パックに多く搭載されてきてい
る。
【０００３】そこで充放電繰り返し回数を数えるには、
予め設定した放電容量以上で放電した後回復充電するこ
とを検出して、充放電繰り返し回数を１回として計測す
る方法が一般的である。
【０００４】この代表的な方法は、図２を参照しながら
以下に説明する。
【０００５】図２は従来の充放電繰り返し回数のカウン
ト演算方法を示すブロック図である。
【０００６】電池パック１と機器本体２とは、電池パッ
ク１の＋端子と機器本体２の＋端子と、また電池パック
１の−端子と機器本体２の−端子と、同じく電池パック
１のデータ通信端子ａと機器本体２のデータ通信端子ｂ
とがそれぞれコネクタなどにより電気的に接続されてい
る。
【０００７】電池パックからの機器本体へ供給される電
流は、複数個の２次電池を直列接続した電池ブロック３
の＋端子から、機器本体２の負荷４に流れ、電流検出抵
抗５を通って電池ブロック３に戻る。電池ブロック３に
流れる充電、放電の電流は、オームの法則により電流検
出抵抗５の両端の電位差に表される。この電流検出抵抗
５の両端の電位差をＡＤ変換回路７でデジタル値に変換
する。電位差が＋か−かによって充放電検出回路８は充
電状態か放電状態かを検出し、放電状態であれば、放電
電流積算回路９にて放電電流積算演算処理を行なう。ま
た、電池が放電から充電に切り換った時に放電電流積算
量を０にクリアする。放電容量設定回路１１には予め設
定された放電容量が記憶されており、放電電流積算回路
９で演算処理された累積放電容量と、放電容量設定回路
１１に記憶された設定放電容量とが放電容量比較回路１
２ｂで比較される。累積放電容量が設定放電容量以上に
なった際に、放電容量比較回路１２ｂから充放電繰り返
し回数カウンタ１３に信号が送られ、充放電繰り返し回
数カウンタ１３が１つカウントアップする。
【０００８】この充放電繰り返し回数は、表示部１４に
出力され、通信回路部１５で通信データに変換され、電
池パック１側のデータ通信端子ａと機器本体２のデータ
通信端子ｂとを通して、機器本体回路１６に入力され、
ＢＭＵからの電池パック１のデータとして演算処理等が
なされる。
【０００９】
【発明が解決しようとする課題】しかしながら、上記の
充放電の繰り返し回数のカウント演算機能を有した電池
パックでは、累積放電容量値が設定放電容量値以上にな
れば、充放電繰り返し回数が１つカウントアップする正
常な動作となるが、放電の途中あるいは放電が停止して
充電されると前記累積放電容量値がリセットされるの
で、累積放電容量値が設定放電容量値未満の状態で充放
電を繰り返すと、充放電を繰り返しているにもかかわら
ず充放電繰り返し回数がカウントアップされない。この
ため、電池パックの実際の使用状態と充放電繰り返し回
数との適正な相関が得られないという問題を有してい
た。
【００１０】本発明はこのような従来の問題を解決する
ものであり、電池の充放電繰り返し回数と繰り返し使用
による電池の老朽状態との適正な相関が得られる充放電
繰り返し回数のカウント演算方法を提供することを目的
とする。
【００１１】
【課題を解決するための手段】上記目的を達成するため
に本発明の電池の充放電繰り返し回数のカウント演算方
法は、２次電池が充電状態であるか放電状態であるかを
検出し、前記２次電池が放電状態であると検出した際に
のみ前記２次電池の放電された容量を累積し、この累積
放電容量が設定した放電容量になったときに、充放電繰
り返し回数を１つカウントアップするとともに、累積放
電容量をリセットするものである。
【００１２】
【発明の実施の形態】本発明は、前記の内容で充放電繰
り返し回数をカウント演算する方法であり、とくに２次
電池が放電状態にある場合にのみ２次電池の放電された
容量を累積し、この累積放電容量が設定した放電容量に
なったときに、充放電繰り返し回数を１つカウントアッ
プするとともに、累積放電容量をリセットする機能を有
したものである。
【００１３】このような構成とすることにより、電池の
容量を十分使い切らずに、浅い放電と充電を繰り返して
使用している場合でも、充放電による電池の老朽度を正
しく数値化できる。したがって、この充放電繰り返し回
数のカウント方法を使えば、電池の老朽度の判断を定量
的に行なうことができる。また、この充放電繰り返し回
数のデータを利用することにより、電池のメンテナンス
性を大幅に向上させたり、機器本体と電源電池相互の制
御を正確に行うことができる。
【００１４】
【実施例】以下、本発明の実施例について、図面を参照
しながら説明する。
【００１５】図1は本発明の実施例における充放電繰り
返し回数のカウント演算方法のブロック図を示すもので
ある。
【００１６】図１において、１は電池パック、２は機器
本体、３はニッケル−水素蓄電池を５セル直列接続して
構成した電池ブロックである。
【００１７】電池パック１と機器本体２とは、電池パッ
ク１の＋端子と機器本体２の＋端子が、また電池パック
１の−端子と機器本体２の−端子が、同じく電池パック
１のデータ通信端子ａと機器本体２のデータ通信端子ｂ
とがそれぞれコネクタなどにより電気的に接続されてい
る。４は機器本体２の負荷、５は電流検出抵抗である。
電池ブロック３の充電時および放電時の電流量は、電流
検出抵抗５の両端の電位差として検出される。６は計測
部であり、７は抵抗５の一端に接続したＡＤ変換回路、
８は充放電検出回路、９は放電電流積算回路、１０は本
発明の特徴である放電容量積算回路、１１は放電容量設
定回路、１２ａは放電容量比較回路、１３は充放電繰り
返し回数カウンタである。１４は表示部であり、１５は
通信回路部である。１６は機器本体２内に設けた機器本
体回路である。
【００１８】次に、この電池パックにおける充放電繰り
返し回数のカウント演算方法について詳しく説明する。
【００１９】電流検出抵抗５の両端における電位差
（充、放電時の電流の方向データ）は、ＡＤ変換回路７
によりデジタルデータに変換される。このデジタルデー
タが＋であれば充電であり、−であれば放電であるが、
その放電状態か充電状態かを充放電検出回路８で検出す
る。放電状態であれば放電電流積算回路９にて電流積算
演算が行なわれる。放電電流積算回路９で演算された積
算放電容量は、放電容量累積回路１０に入力され、ここ
で累積演算が行われる。
【００２０】この累積放電容量と、放電容量設定回路１
１で設定された設定放電容量とは、放電容量比較回路１
２ａで比較され、累積放電容量が設定放電容量になった
ときに、充放電繰り返し回数カウンタ１３を１つカウン
トアップすると同時に放電容量累積回路１０の累積放電
容量を０にリセットする。
【００２１】充放電繰り返し回数カウンタ１３で得られ
た充放電繰り返し回数は、表示部１４に出力され、通信
回路１５から電池パック１のデータ通信端子ａと機器本
体２のデータ通信端子ｂを通して、機器本体２内の機器
本体回路１６に送られＢＭＵからの電池パック１の充放
電繰り返し回数データとして演算処理等に用いられる。
【００２２】なお、充放電繰り返し回数のカウント演算
は、回路１０の累積放電容量が０にリセットされた後、
再度放電容量の累積がなされて、上記の動作が繰り返さ
れる。
【００２３】
【発明の効果】以上のように本発明は、２次電池が放電
状態にある場合にのみ電池の放電された容量を累積し、
この累積放電容量が設定した放電容量まで放電されたと
きに充放電繰り返し回数カウンタを１つカウントアップ
するとともに、累積放電容量０にリセットする電池の充
放電繰り返し回数のカウント演算方法であり、電池の容
量を全て使い切らずに、浅い放電と充電を繰り返してい
ても放電容量累積回路で積算された累積放電容量が設定
した放電容量になったときにも、充放電繰り返しカウン
タを１つカウントアップする機能を有しているので、、
電池の実際の使用状態と演算される充放電繰り返し回数
との相関がとれ、電池のメンテナンスを的確に行える。
また、この電池の充放電繰り返し回数を正確に把握する
ことによって、このデータを利用して電池パックと機器
本体相互の制御を正確に行うことができる。Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention calculates the state of a battery during operation, such as a remaining capacity that can be discharged, and manages the power of an apparatus body to which the battery is mounted. For this purpose, a battery management unit (Battery Management Un) that outputs data indicating the state of the battery to the device body
The present invention relates to a method for calculating the number of times of repetition of charge / discharge of a battery that supplies power to a load composed of a power tool such as a notebook computer or an electric screwdriver. 2. Description of the Related Art In recent years, a method of counting the number of times of repetition of charge / discharge has been frequently mounted on a battery pack as an important function of a BMU such as a battery pack for a notebook personal computer. To count the number of charge / discharge repetitions,
In general, a method of detecting recovery charge after discharging at a discharge capacity equal to or greater than a predetermined discharge capacity and measuring the number of repetition of charge / discharge as one is generally used. [0004] This representative method will be described below with reference to FIG. FIG. 2 is a block diagram showing a conventional count calculation method of the number of charge / discharge repetitions. The battery pack 1 and the device main body 2 are connected to the + terminal of the battery pack 1 and the + terminal of the device main body 2, the − terminal of the battery pack 1 and the − terminal of the device main body 2, and the data of the battery pack 1. Communication terminal a and data communication terminal b of device body 2
Are electrically connected by a connector or the like. [0007] The current supplied from the battery pack to the main body of the device is a battery block 3 in which a plurality of secondary batteries are connected in series.
Flows from the + terminal to the load 4 of the device main body 2, returns to the battery block 3 through the current detection resistor 5. The charge and discharge currents flowing through the battery block 3 are represented by the potential difference between both ends of the current detection resistor 5 according to Ohm's law. The potential difference between both ends of the current detection resistor 5 is converted into a digital value by the AD conversion circuit 7. The charge / discharge detection circuit 8 detects whether the state is a charge state or a discharge state depending on whether the potential difference is + or-. If the charge state is a discharge state, the discharge current integration circuit 9 performs a discharge current integration calculation process. Also, when the battery switches from discharging to charging, the integrated discharge current is cleared to zero. The discharge capacity setting circuit 11 stores a preset discharge capacity. The accumulated discharge capacity calculated by the discharge current integrating circuit 9 and the set discharge capacity stored in the discharge capacity setting circuit 11 are the discharge capacity. Comparison circuit 1
2b. When the accumulated discharge capacity becomes equal to or larger than the set discharge capacity, a signal is sent from the discharge capacity comparison circuit 12b to the charge / discharge repetition number counter 13, and the charge / discharge repetition number counter 13 counts up by one. The charge / discharge repetition count is output to the display unit 14, converted into communication data by the communication circuit unit 15, and passed through the data communication terminal “a” of the battery pack 1 and the data communication terminal “b” of the device body 2. Input to the main body circuit 16,
Calculation processing and the like are performed as data of the battery pack 1 from the BMU. However, in the battery pack having the function of counting the number of repetitions of charge / discharge, if the cumulative discharge capacity value becomes equal to or more than the set discharge capacity value, the number of charge / discharge repetitions is increased. Is a normal operation that counts up by one, but during discharge or when the discharge stops.
When the battery is charged, the accumulated discharge capacity value is reset.
If the charge / discharge is repeated in a state where the accumulated discharge capacity value is less than the set discharge capacity value, the charge / discharge repeat count is not counted up even though the charge / discharge is repeated. For this reason, there was a problem that an appropriate correlation between the actual use state of the battery pack and the number of charge / discharge repetitions could not be obtained. The present invention solves such a conventional problem, and provides a method of counting the number of charge / discharge repetitions in which an appropriate correlation between the number of charge / discharge repetitions of the battery and the aging state of the battery due to repeated use is obtained. The purpose is to provide. In order to achieve the above object, a method of counting the number of repetitions of charge / discharge of a battery according to the present invention comprises determining whether a secondary battery is in a charged state or a discharged state.
And when it is detected that the secondary battery is in a discharged state,
Only the discharged capacity of the secondary battery is accumulated, and when the accumulated discharge capacity reaches the set discharge capacity, the number of charge / discharge repetitions is counted up by one and the accumulated discharge capacity is reset. . DETAILED DESCRIPTION OF THE INVENTION The present invention is a method of counting operation of the charge-discharge repetition number of times the contents of the, in particular secondary
Only when the battery is in the discharged state, the discharged capacity of the secondary battery is accumulated. When the accumulated discharge capacity reaches the set discharge capacity, the number of charge / discharge repetitions is counted up by one, and It has a function of resetting the capacity. With this configuration, even when the battery capacity is not fully used and the shallow discharge and charge are used repeatedly, the degree of deterioration of the battery due to charge and discharge can be correctly quantified. Therefore, by using the method of counting the number of times of repetition of charge / discharge, the aging degree of the battery can be quantitatively determined. Also, by using the data of the number of repetitions of charge / discharge, the maintainability of the battery can be greatly improved, and the control between the device body and the power supply battery can be accurately performed. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a method for calculating the number of times of repetition of charging and discharging in an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a battery pack, 2 denotes an apparatus main body, and 3 denotes a battery block formed by connecting five nickel-hydrogen storage batteries in series. The battery pack 1 and the equipment main body 2 have a positive terminal of the battery pack 1 and a positive terminal of the equipment main body 2, and a negative terminal of the battery pack 1 and a negative terminal of the equipment main body 2. Communication terminal a and data communication terminal b of device body 2
Are electrically connected by a connector or the like. Reference numeral 4 denotes a load of the device main body 2, and reference numeral 5 denotes a current detection resistor.
The amount of current at the time of charging and discharging of the battery block 3 is detected as a potential difference between both ends of the current detection resistor 5. 6 is a measuring unit, 7 is an AD conversion circuit connected to one end of the resistor 5,
8 is a charge / discharge detection circuit, 9 is a discharge current integration circuit, 10 is a discharge capacity integration circuit which is a feature of the present invention, 11 is a discharge capacity setting circuit, 12a is a discharge capacity comparison circuit, and 13 is a charge / discharge repetition number counter. . Reference numeral 14 denotes a display unit, and 15 denotes a communication circuit unit. Reference numeral 16 denotes a device main body circuit provided in the device main body 2. Next, a method of counting the number of repetitions of charge / discharge in this battery pack will be described in detail. The potential difference between both ends of the current detecting resistor 5 (current direction data at the time of charging and discharging) is calculated by an AD conversion circuit 7.
Is converted into digital data. If the digital data is +, it is charging, and if it is-, it is discharging,
The charge / discharge detection circuit 8 detects whether the battery is discharged or charged. If the battery is in the discharging state, the discharging current integrating circuit 9 performs a current integrating operation. The integrated discharge capacity calculated by the discharge current integrating circuit 9 is input to the discharge capacity accumulating circuit 10, where the accumulative calculation is performed. The accumulated discharge capacity and the discharge capacity setting circuit 1
The set discharge capacity set in 1 is the discharge capacity comparison circuit 1
When the comparison is made at 2a, when the accumulated discharge capacity reaches the set discharge capacity, the charge / discharge repetition number counter 13 is counted up by one, and at the same time, the accumulated discharge capacity of the discharge capacity accumulation circuit 10 is reset to zero. The number of charge / discharge repetitions obtained by the charge / discharge repetition number counter 13 is output to the display unit 14, and is transmitted from the communication circuit 15 through the data communication terminal a of the battery pack 1 and the data communication terminal b of the device main body 2. The data is sent to the device main body circuit 16 in the main body 2 and used as arithmetic and other processing as data on the number of charge / discharge repetitions of the battery pack 1 from the BMU. Note that the count calculation of the number of charge / discharge repetitions is performed after the cumulative discharge capacity of the circuit 10 is reset to 0.
The discharge capacity is accumulated again, and the above operation is repeated. As described above, according to the present invention, the secondary battery is discharged.
Accumulates the discharged capacity of the battery only when in the state ,
When the accumulated discharge capacity is discharged to the set discharge capacity, the charge / discharge repetition counter is counted up by one, and the accumulated discharge capacity is reset to zero. A function that counts up the charge / discharge repetition counter by one when the accumulated discharge capacity accumulated by the discharge capacity accumulation circuit reaches the set discharge capacity even if the discharge capacity is not used up and the shallow discharge and charge are repeated. Since it has
Correlation between the actual use state of the battery and the calculated number of charge / discharge repetitions can be taken, and the maintenance of the battery can be performed accurately.
Further, by accurately grasping the number of times of repetition of charge / discharge of the battery, the data can be used to accurately control the battery pack and the device body.
【図面の簡単な説明】
【図１】本発明の実施例における充放電繰り返し回数の
カウント演算方法の構成を示すブロック図
【図２】従来例における充放電繰り返し回数のカウント
演算方法の構成を示すブロック図
【符号の説明】
１ 電池パック
２ 機器本体
３ 電池ブロック
４ 負荷
５ 電流検出抵抗
６ 計測部
７ ＡＤ変換回路
８ 充放電検出回路
９ 放電電流積算回路
１０ 放電容量累積回路
１１ 放電容量設定回路
１２ａ 放電容量比較回路
１３ 充放電繰り返し回数カウンタ
１４ 表示部
１５ 通信回路部
１６ 機器本体回路BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of a method of counting the number of times of repetition of charging and discharging in an embodiment of the present invention. Block diagram [Description of reference numerals] 1 Battery pack 2 Device main body 3 Battery block 4 Load 5 Current detection resistor 6 Measurement unit 7 AD conversion circuit 8 Charge / discharge detection circuit 9 Discharge current integration circuit 10 Discharge capacity accumulation circuit 11 Discharge capacity setting circuit 12a Discharge capacity comparison circuit 13 Charge / discharge repetition counter 14 Display unit 15 Communication circuit unit 16 Main unit circuit
Claims (1)
るかを検出し、前記２次電池が放電状態であると検出し
た際にのみ前記２次電池の放電された容量を累積し、こ
の累積放電容量が設定した放電容量になったときに、充
放電繰り返し回数を１つカウントアップするとともに、
累積放電容量をリセットする電池の充放電繰り返し回数
のカウント演算方法。(57) Claims 1. The secondary battery is in a charged state or a discharged state.
The secondary battery is in a discharged state.
Only when the discharge capacity of the secondary battery is accumulated, and when the accumulated discharge capacity reaches the set discharge capacity, the charge / discharge repetition count is incremented by one,
A method for counting the number of repetitions of charge / discharge of a battery for resetting the accumulated discharge capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03697598A JP3500949B2 (en) | 1998-02-19 | 1998-02-19 | Counting method of battery charge / discharge repetition count |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03697598A JP3500949B2 (en) | 1998-02-19 | 1998-02-19 | Counting method of battery charge / discharge repetition count |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11233153A JPH11233153A (en) | 1999-08-27 |
| JP3500949B2 true JP3500949B2 (en) | 2004-02-23 |
Family
ID=12484769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03697598A Expired - Fee Related JP3500949B2 (en) | 1998-02-19 | 1998-02-19 | Counting method of battery charge / discharge repetition count |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3500949B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3508636B2 (en) | 1999-08-19 | 2004-03-22 | 日産自動車株式会社 | Control device for electromagnetically driven intake and exhaust valves |
| JP5125070B2 (en) | 2006-11-17 | 2013-01-23 | 富士通株式会社 | Battery control device, battery control method, battery pack, electronic device, battery control program, and control circuit |
-
1998
- 1998-02-19 JP JP03697598A patent/JP3500949B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11233153A (en) | 1999-08-27 |
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