JPH11233160A - Battery pack - Google Patents
Battery packInfo
- Publication number
- JPH11233160A JPH11233160A JP10034476A JP3447698A JPH11233160A JP H11233160 A JPH11233160 A JP H11233160A JP 10034476 A JP10034476 A JP 10034476A JP 3447698 A JP3447698 A JP 3447698A JP H11233160 A JPH11233160 A JP H11233160A
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- charge
- battery
- battery pack
- discharge capacity
- 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
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
- Tests Of Electric Status Of Batteries (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、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（Ｂ
ａｔｔｅｒｙ Ｍａｎａｇｅｍｅｎｔ Ｕｎｉｔ、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
電池パックに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention calculates the state of a battery during operation, such as the remaining capacity, and stores data indicating the state of the battery in the apparatus body in order to manage the power of the apparatus body to which the battery is mounted. Output battery management unit (B
The present invention relates to a battery pack that has an battery management unit (hereinafter referred to as a BMU) and supplies power to a load including a power tool such as a notebook computer or an electric screwdriver.
【０００２】[0002]
【従来の技術】近年、電池パックは、充放電繰り返し回
数や残容量などを演算出力するＢＭＵの機能を有したも
のが広く使用されている。2. Description of the Related Art In recent years, battery packs having a BMU function of calculating and outputting the number of repetitions of charge / discharge and the remaining capacity have been widely used.
【０００３】この電池パックについて図２を参照しなが
らその動作を以下に説明する。図２は従来の充放電繰り
返し回数のカウント演算機能を有した電池パック１と機
器本体２とを示すブロック図である。The operation of this battery pack will be described below with reference to FIG. FIG. 2 is a block diagram showing a conventional battery pack 1 and a device main body 2 having a function of counting the number of times of repetition of charge and discharge.
【０００４】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。[0004] The battery pack 1 and the equipment body 2 are connected to the + terminal of the battery pack 1 and the + terminal of the equipment body 2, the − terminal of the battery pack 1 and the − terminal of the equipment 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.
【０００５】電池パックより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を介して流れ、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の両端の電位差に変換される。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８ｂ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１３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
１３に記憶された設定放電容量とが放電容量比較回路１
４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１４から充放電繰り返し回数
カウンタ１５ｂに信号が送られ、充放電繰り返し回数カ
ウンタ１５ｂがカウントアップする。The current supplied from the battery pack to the equipment main body flows from the + terminal of the battery block 3 in which a plurality of secondary batteries are connected in series, via the load 4 of the equipment main body 2, and passes through the current detection resistor 5. To return to the battery block 3. The charge / discharge current flowing through the battery block 3 is converted into a potential difference between both ends of the current detection resistor 5 according to Ohm's law. Current detection resistor 5
Is converted into a digital value by the AD conversion circuit 7. The charge / discharge detection circuit 8b 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. When the battery switches from discharge to charge, the integrated discharge current is cleared to zero. The discharge capacity setting circuit 13 stores a preset discharge capacity, and the accumulated discharge capacity calculated by the discharge current integrating circuit 9 and the set discharge capacity stored in the discharge capacity setting circuit 13 correspond to the discharge capacity. Comparison circuit 1
4 is compared. When the accumulated discharge capacity exceeds the set discharge capacity, a signal is sent from the discharge capacity comparison circuit 14 to the charge / discharge repetition number counter 15b, and the charge / discharge repetition number counter 15b counts up.
【０００６】この充放電繰り返し回数は、表示部１６に
出力され、通信回路部１７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１８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。The charge / discharge repetition count is output to the display unit 16 and converted into communication data by the communication circuit unit 17, and is 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 18,
Calculation processing and the like are performed as data of the battery pack 1 from the BMU.
【０００７】[0007]
【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、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相関が得られないという問題を有し
ていた。However, in the battery pack having the function of counting the number of repetitions of charging / discharging, the number of repetition of charging / discharging is counted by one when the accumulated discharge capacity value exceeds the set discharging capacity value. Although the operation is normal, the charge / discharge cycle is not repeated. When the charge / discharge cycle 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 even though the charge / discharge cycle is repeated. For this reason, there was a problem that a correlation between the actual use state of the battery pack and the number of charge / discharge repetitions could not be obtained.
【０００８】本発明はこのような従来の問題を解決する
ものであり、電池パックの実際の使用状態と充放電繰り
返し回数との相関が得られる充放電繰り返し回数のカウ
ント演算機能を有した電池パックを提供することを目的
とする。The present invention solves such a conventional problem, and a battery pack having a function of counting the number of charge / discharge repetitions capable of obtaining a correlation between the actual use state of the battery pack and the number of charge / discharge repetitions. The purpose is to provide.
【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
に本発明は、１個または複数個の２次電池と、この電池
を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
計測部と、その計測回数を表示する表示部と、充放電繰
り返し回数を機器本体へ通信する通信回路部とを備えた
電池パックであって、計測部は、２次電池を設定した放
電容量未満で放電を行った後充電に切り換えることを検
出して、充放電切り換え回数を１回として計測し、この
充放電切り換え回数が、累計であらかじめ設定した回数
になった時にも、２次電池の設定した放電容量以上の充
放電繰り返し回数を１つカウントアップする機能を有し
たものとした。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention detects one or a plurality of secondary batteries and discharges the batteries at a set discharge capacity or more and then recovers and charges the batteries. A battery pack comprising: a measurement unit that measures the number of charge / discharge repetitions as one; a display unit that displays the number of times of the measurement; and a communication circuit unit that communicates the number of charge / discharge repetitions to the device body. The unit detects that switching to charging is performed after discharging the secondary battery with less than the set discharge capacity, and counts the number of times of charge / discharge switching as one, and the number of times of charge / discharge switching is set in advance by a cumulative total. When the number of times reached, the battery had a function of counting up the number of charge / discharge repetitions exceeding the set discharge capacity of the secondary battery by one.
【００１０】[0010]
【発明の実施の形態】本発明は、前記の内容の電池パッ
クであり、とくに設定した放電容量以上で放電した後に
回復充電することを充放電繰り返し回数１回として計測
部で計測することに加えて、設定した放電容量未満で放
電を行った後に充電する回数も計測し、この計測回数が
累計であらかじめ設定した回数以上になった時にも、充
放電繰り返し回数を１つカウントアップする機能を加え
たものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a battery pack having the above-described contents, and in addition to measuring the recovery charge after discharging at a discharge capacity equal to or more than a set discharge capacity as one charge / discharge repetition count, a measuring unit is used. In addition, the number of times of charging after discharging with less than the set discharge capacity is also measured, and a function is added to count up the number of charge / discharge repetitions by one even when the number of times of measurement becomes equal to or more than the preset number of times. It is a thing.
【００１１】このような構成とすることにより、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
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。つまり、この電池パックは老朽度の判
断を定量的に行なうことができ、これにより電池パック
のメンテナンス性を大幅に向上させたり、機器本体と電
池パック相互の制御を正確に行うことができる。With such a configuration, even when the battery is repeatedly used and shallowly discharged and charged without using up the entire capacity of the battery, the aging degree of the battery due to charge and discharge can be correctly quantified. That is, the battery pack can quantitatively determine the degree of aging, thereby greatly improving the maintainability of the battery pack and accurately controlling the device main body and the battery pack.
【００１２】[0012]
【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。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】図1は本発明の実施例における電池パック
１と機器本体２を示すブロック図である。FIG. 1 is a block diagram showing a battery pack 1 and a device main body 2 according to an embodiment of the present invention.
【００１４】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。
５個のニッケル−水素蓄電池からなる電池ブロック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、８ａは充放電検出
回路、９は放電電流積算回路、１０は充放電切り変わり
回数カウンタ、１１は回数設定回路、１２は回数比較回
路、１３は放電容量設定回路、１４は放電容量比較回
路、１５ａは充放電繰り返し回数カウンタである。１６
は表示部であり、１７は通信回路である。１８は機器本
体２内の機器本体回路である。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 during charging and discharging of the battery block 3 composed of five nickel-hydrogen storage batteries 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, 8a is a charge / discharge detection circuit, 9 is a discharge current integration circuit, 10 is a charge / discharge switching number counter, 11 is a number setting circuit, 12 is a number setting circuit. Is a number comparison circuit, 13 is a discharge capacity setting circuit, 14 is a discharge capacity comparison circuit, and 15a is a charge / discharge repetition number counter. 16
Is a display unit, and 17 is a communication circuit. Reference numeral 18 denotes a device main body circuit in the device main body 2.
【００１５】次にこの実施例における電池パックの動作
について詳しく説明する。Next, the operation of the battery pack in this embodiment will be described in detail.
【００１６】電流検出抵抗５の両端における電位差（充
電、放電時の電流データ）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データより充放電検出回路８ａ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。The potential difference between both ends of the current detection resistor 5 (current data at the time of charging and discharging) is converted into digital data by the AD conversion circuit 7. If the digital data is positive, the charge is performed, and if the digital data is negative, the discharge is performed. The charge or discharge detection circuit 8a detects whether the digital data is discharged or charged based on the data. If the battery is in the discharging state, the discharging current integrating circuit 9 performs a current integrating operation.
【００１７】また、充放電検出回路８ａで放電状態から
充電状態に変わったことを検出すると、放電電流積算回
路９の電流積算演算量は０にクリアされる。さらに、充
放電検出回路８ａで充電状態と放電状態の切り換えを検
出すると、充放電切り換え回数カウンタ１０をカウント
アップする。When the charge / discharge detection circuit 8a detects a change from a discharge state to a charge state, the current integration operation amount of the discharge current integration circuit 9 is cleared to zero. Further, when the charge / discharge detection circuit 8a detects switching between the charge state and the discharge state, the charge / discharge switching number counter 10 is counted up.
【００１８】回数設定回路１１であらかじめ設定した回
数値と充放電切り換え回数カウンタ１０のカウント値を
回数比較回路１２で比較し、カウント値が設定回数値に
なると、充放電繰り返し回数カウンタ１５ａをカウント
アップすると同時に充放電切り換え回数カウンタ１０を
０にクリアする。The count value set by the count setting circuit 11 is compared with the count value of the charge / discharge switching count counter 10 by the count comparison circuit 12, and when the count value reaches the set count value, the charge / discharge repetition counter 15a is counted up. At the same time, the charge / discharge switching number counter 10 is cleared to zero.
【００１９】充放電繰り返し回数カウンタ１５ａで得ら
れた充放電繰り返し回数は、表示部１６に出力され、通
信回路部１７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１８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。The charge / discharge repetition number obtained by the charge / discharge repetition number counter 15a is output to the display unit 16, and is transmitted from the communication circuit unit 17 through the data communication terminal a of the battery pack 1 and the data communication terminal b of the device body 2. The battery pack 1 sent to the device body circuit 18 in the device body 2 and transmitted from the BMU
Is used in arithmetic processing and the like as charge / discharge repetition number data.
【００２０】[0020]
【発明の効果】以上のように本発明の電池パックは、設
定した放電容量以上で放電した後に回復充電することを
充放電繰り返し回数１回として計測部で計測することに
加えて、設定した放電容量未満で放電を行った後に充電
する回数も計測し、この計測回数が累計であらかじめ設
定した回数以上になった時にも、充放電繰り返し回数を
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、優れた電池パックのメンテナンスを行える。
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える。As described above, according to the battery pack of the present invention, in addition to measuring the recovery charge after discharging at a discharge capacity equal to or more than the set discharge capacity as one charge / discharge repetition count, the measuring unit also performs the set discharge. Since the number of times of charging after discharging with less than the capacity is also measured, and when the number of times of measurement becomes equal to or more than the number of times set in advance, the function of counting up the number of charge / discharge repetitions by one is provided. Correlation between the actual use state of the battery and the calculated number of charge / discharge repetitions can be obtained, and excellent battery pack maintenance can be performed.
Further, by accurately grasping the number of repetition of charge / discharge of the battery, the data can be used to accurately control the battery pack and the device body.
【図１】本発明の実施例における電池パックと機器本体
を示すブロック図FIG. 1 is a block diagram showing a battery pack and a device main body according to an embodiment of the present invention.
【図２】従来例における電池パックと機器本体を示すブ
ロック図FIG. 2 is a block diagram showing a conventional battery pack and a device main body.
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 充放電切り換え回数カウンタ １１ 回数設定回路 １２ 回数比較回路 １３ 放電容量設定回路 １４ 放電容量比較回路 １５ 充放電繰り返し回数カウンタ １６ 表示部 １７ 通信回路部 １８ 機器本体回路 REFERENCE SIGNS LIST 1 battery pack 2 device body 3 battery block 4 load 5 current detection resistor 6 measuring unit 7 AD conversion circuit 8 charge / discharge detection circuit 9 discharge current integration circuit 10 charge / discharge switching counter 11 count setting circuit 12 count comparison circuit 13 discharge capacity setting Circuit 14 Discharge capacity comparison circuit 15 Charge / discharge repetition counter 16 Display unit 17 Communication circuit unit 18 Main unit circuit
Claims (1)
を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
計測部と、その計測回数を表示する表示部と、前記充放
電繰り返し回数を機器本体へ通信する通信回路部とを備
えた電池パックであって、前記計測部は、前記２次電池
を設定した放電容量未満で放電を行った後充電に切り換
えることを検出して、充放電切り換え回数を１回として
計測し、この充放電切り換え回数が累計であらかじめ設
定した回数になった時に、前記２次電池の設定した放電
容量以上の充放電繰り返し回数を１つカウントアップす
る機能を有している電池パック。1. A measuring unit for detecting one or more secondary batteries, detecting that the battery is discharged at a discharge capacity equal to or greater than a set discharge capacity, and then performing recovery charging, and measuring the number of charge / discharge repetitions as one. A battery pack including a display unit for displaying the number of times of measurement, and a communication circuit unit for communicating the number of times of charge / discharge repetition to a device main body, wherein the measuring unit is less than a discharge capacity set for the secondary battery. It is detected that switching to charging is performed after performing discharging, and the number of times of charging / discharging switching is measured as one. When the number of times of charging / discharging switching reaches a preset number of times in total, the secondary battery is set. A battery pack having a function of counting up one charge / discharge repetition count greater than or equal to a discharge capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10034476A JPH11233160A (en) | 1998-02-17 | 1998-02-17 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10034476A JPH11233160A (en) | 1998-02-17 | 1998-02-17 | Battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11233160A true JPH11233160A (en) | 1999-08-27 |
Family
ID=12415314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10034476A Pending JPH11233160A (en) | 1998-02-17 | 1998-02-17 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11233160A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020090756A (en) * | 2001-05-29 | 2002-12-05 | 주식회사 이랜텍 | Method for counting charge and discharge cycle of smart battery |
| JP2007320259A (en) * | 2006-06-02 | 2007-12-13 | Ricoh Co Ltd | Image forming apparatus |
| JP2013179051A (en) * | 2011-08-22 | 2013-09-09 | Nec Corp | Secondary battery state notification system, secondary battery state notification method, and secondary battery state notification program |
| KR101417105B1 (en) * | 2008-09-08 | 2014-07-08 | 현대자동차주식회사 | A method for measuring battery capacity of a vehicle |
-
1998
- 1998-02-17 JP JP10034476A patent/JPH11233160A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020090756A (en) * | 2001-05-29 | 2002-12-05 | 주식회사 이랜텍 | Method for counting charge and discharge cycle of smart battery |
| JP2007320259A (en) * | 2006-06-02 | 2007-12-13 | Ricoh Co Ltd | Image forming apparatus |
| KR101417105B1 (en) * | 2008-09-08 | 2014-07-08 | 현대자동차주식회사 | A method for measuring battery capacity of a vehicle |
| JP2013179051A (en) * | 2011-08-22 | 2013-09-09 | Nec Corp | Secondary battery state notification system, secondary battery state notification method, and secondary battery state notification program |
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