JP3401517B2 - Battery pack power supply - Google Patents
Battery pack power supplyInfo
- Publication number
- JP3401517B2 JP3401517B2 JP15720799A JP15720799A JP3401517B2 JP 3401517 B2 JP3401517 B2 JP 3401517B2 JP 15720799 A JP15720799 A JP 15720799A JP 15720799 A JP15720799 A JP 15720799A JP 3401517 B2 JP3401517 B2 JP 3401517B2
- Authority
- JP
- Japan
- Prior art keywords
- battery pack
- temperature
- discharge
- preliminary
- charging
- 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 - Lifetime
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
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池の使用状況、
温度に応じて予備放電又は予備充電又は予備充放電の制
御を行う電池パック制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a battery pack control device that controls preliminary discharge, preliminary charge, or preliminary charge / discharge according to temperature.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】電池パ
ックは、複数のセル（２次電池）を内蔵して、携帯電話
やノートパソコン、プレーヤー、デジタルカメラなどの
携帯型電子機器の電源とする小容量のものから、電気自
動車の電源とする大容量のものまで、様々な電気機器に
採用されている。各種電気機器は、通常起動時に大電流
が流れ、特に電気自動車の場合には、発進の時の数秒と
いう短時間で大電流を必要とする。そのため、対応策と
して、スーパーキャパシタを各セルに並列に接続する等
が考えられるが、十分ではない。例えば−５℃以下の低
温下で電池パックの放電を行う場合、放電電流が大きい
と電池の内部インピーダンスが大きいため、電池電圧の
電圧降下が大きく過放電電圧以下となり、放電できなく
なることがある。2. Description of the Related Art A battery pack contains a plurality of cells (secondary batteries) and is used as a power source for portable electronic equipment such as mobile phones, notebook computers, players and digital cameras. It is used in a variety of electrical equipment, from small capacity to large capacity power source for electric vehicles. A large current usually flows through various electric devices at the time of starting, and particularly in the case of an electric vehicle, a large current is required in a short time such as several seconds when starting. Therefore, as a countermeasure, a supercapacitor may be connected in parallel to each cell, but this is not sufficient. For example, when the battery pack is discharged at a low temperature of −5 ° C. or lower, if the discharge current is large, the internal impedance of the battery is large, so that the voltage drop of the battery voltage becomes large and becomes less than the over-discharge voltage, and the battery cannot be discharged.
【０００３】また、電池は、充放電することなく長期間
にわたり放置されると、不活性物質が生成されて劣化
し、温度が高いほど劣化が激しく、満充電状態に近い方
が劣化が激しい。If the battery is left for a long time without being charged and discharged, an inactive substance is generated and deteriorates. The higher the temperature, the more severe the deterioration becomes.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記課題を解
決するものであって、低温下での大電流の放電不能を解
消するものである。DISCLOSURE OF THE INVENTION The present invention is to solve the above problems and to eliminate the inability to discharge a large current at a low temperature.
【０００５】そのために本発明は、予備充電、予備放電
を行う予備充放電手段とセルの温度を検出する温度検出
手段を有し外部ホスト機器への放電を行う主電池パック
において、前記主電池パックが外部ホスト機器へ放電す
る場合に、前記温度検出手段により検出される前記セル
の温度が所定値以下のとき、セル電圧が所定値の範囲内
で、前記主電池パックから前記予備充放電手段へ所定時
間の予備放電を行って前記セルの温度が所定値以下か否
かを判断し、前記セルの温度が所定値以上になれば前記
外部ホスト機器への放電を行い、前記セルの温度が所定
値以上にならなければ前記主電池パックへ前記予備充放
電手段から所定時間の予備充電を行って前記セルの温度
が所定値以下か否かを判断しつつ前記セルの温度が所定
値に達するまで、前記予備放電と予備充電とを繰り返し
行うことを特徴とするものである。To this end, the present invention provides a main battery pack which has a preliminary charging / discharging means for performing preliminary charging / preliminary discharging and a temperature detecting means for detecting the temperature of a cell, and discharges to an external host device. When the temperature of the cell detected by the temperature detecting means is equal to or lower than a predetermined value when the battery is discharged to an external host device, the cell voltage is within the predetermined value range.
At the predetermined time from the main battery pack to the preliminary charging / discharging means
If the temperature of the cell is below a specified value by performing preliminary discharge for
If the temperature of the cell exceeds a predetermined value, then
Discharge to the external host device, and the temperature of the cell becomes
If it does not exceed the value, the preliminary charge to the main battery pack
Temperature of the cell after precharging for a predetermined time
Is determined to be equal to or less than a predetermined value, and the preliminary discharge and the preliminary charge are repeatedly performed until the temperature of the cell reaches a predetermined value.
【０００６】[0006]
【０００７】さらに、前記予備充放電手段は、前記主電
池パックの充放電回路を有する補助電池パックからな
り、前記主電池パックと前記補助電池パックとの間で前
記予備充電、予備放電を行うことを特徴とし、前記充放
電回路は、ＤＣ／ＤＣコンバータであり、前記主電池パ
ックは、外部ホスト機器が装着されていないとき又は外
部ホスト機器がバッテリ駆動していないときで、且つ残
容量が所定値以下のとき補助電池パックに放電を行って
残容量を０にした後、補助電池パックから充電を行い、
前記主電池パックは、外部ホスト機器が装着されていな
いとき又は外部ホスト機器がバッテリ駆動していないと
きに補助電池パックと所定容量分の充放電を行うことに
より、内部インピーダンスと開路電圧を算出し、前記補
助電池パックは、主電池パックから外部ホスト機器への
放電を開始した後、残容量分を主電池パックに充電する
ことを特徴とするものである。Further, the preliminary charging / discharging means comprises an auxiliary battery pack having a charging / discharging circuit for the main battery pack, and performs the preliminary charging / preliminary discharging between the main battery pack and the auxiliary battery pack. The charging / discharging circuit is a DC / DC converter, and the main battery pack has a predetermined remaining capacity when an external host device is not attached or when the external host device is not driven by a battery. When the value is less than the value, the auxiliary battery pack is discharged to zero the remaining capacity, and then the auxiliary battery pack is charged.
The main battery pack calculates an internal impedance and an open circuit voltage by charging and discharging a predetermined capacity with the auxiliary battery pack when the external host device is not attached or when the external host device is not driven by the battery. The auxiliary battery pack is characterized by charging the main battery pack with the remaining capacity after starting the discharge from the main battery pack to the external host device.
【０００８】前記主電池パックの充電においては、充電
開始電圧と充電停止電圧との間でパルス充電を行い、前
記充電停止電圧に達したとき瞬時的に放電を行うことを
特徴とするものである。In charging the main battery pack, pulse charging is performed between a charge start voltage and a charge stop voltage, and when the charge stop voltage is reached, the battery is instantaneously discharged. .
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照しつつ説明する。図１は本発明に係る電池パック
電源装置の実施の形態を示す図であり、１は主電池パッ
ク、２、７は制御回路、３、８は充放電用ＦＥＴ、４、
９はセル、５は温度センサ、６は補助電池パック、１０
はＤＣ／ＤＣコンバータを示す。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a battery pack power supply device according to the present invention, in which 1 is a main battery pack, 2 and 7 are control circuits, 3 and 8 are charge / discharge FETs, 4 and
9 is a cell, 5 is a temperature sensor, 6 is an auxiliary battery pack, 10
Indicates a DC / DC converter.
【００１０】図１において、主電池パック１は、全体を
制御する制御回路２、１乃至複数の直列接続電池からな
るセル４、セルの充放電を行う充放電用ＦＥＴ３、セル
４の温度を検出する手段として温度センサ５を有するも
のである。制御回路２は、セルの電圧、温度、充放電後
の経過時間を計測、監視して充放電用ＦＥＴ３、補助電
池パック６を制御する、例えばマイコンであり、補助電
池パック６の制御回路７、外部ホスト機器（図示せず）
などとバス接続されている。補助電池パック６は、主電
池パック１と同様、制御回路７、セル９、充放電用ＦＥ
Ｔ８を有すると共に、充放電の電流を制御するＤＣ／Ｄ
Ｃコンバータ１０を有し、主電池パック１の予備充電、
予備放電、予備充放電などを行うものである。In FIG. 1, a main battery pack 1 detects a temperature of a control circuit 2 for controlling the whole, a cell 4 composed of one to a plurality of series-connected batteries, a charging / discharging FET 3 for charging / discharging the cells, and a cell 4. The temperature sensor 5 is provided as a means for doing so. The control circuit 2 is, for example, a microcomputer that controls the charging / discharging FET 3 and the auxiliary battery pack 6 by measuring and monitoring the cell voltage, temperature, and elapsed time after charging / discharging, and the control circuit 7 of the auxiliary battery pack 6, External host device (not shown)
It is connected to the bus. The auxiliary battery pack 6 is similar to the main battery pack 1 in that the control circuit 7, the cells 9 and the charging / discharging FE are used.
DC / D with T8 and controlling charge / discharge current
Preliminary charging of the main battery pack 1 having the C converter 10,
The preliminary discharge and the preliminary charge / discharge are performed.
【００１１】次に、予備充電、予備放電、予備充放電の
制御を説明する。図２は外部ホスト機器へ本放電を開始
する際に温度に応じて行う予備充放電処理を説明するた
めの図、図３は外部ホスト機器へ本放電を開始した後の
充放電処理を説明するための図である。Next, control of preliminary charging, preliminary discharging and preliminary charging / discharging will be described. FIG. 2 is a diagram for explaining a preliminary charging / discharging process performed according to the temperature when starting the main discharge to the external host device, and FIG. 3 illustrates a charging / discharging process after starting the main discharge to the external host device. FIG.
【００１２】上記構成において、主電池パック１は、外
部ホスト機器へ放電を行うとき、図２に示すようにま
ず、制御回路２において、温度センサ５によりセル４の
温度を監視し、セル４の温度が所定値以下か否かを判断
し（ステップＳ１１）、所定値以下でない場合には外部
ホスト機器への本放電を開始するが、所定値以下である
場合には、制御回路２からバスを介して補助電池パック
６の制御回路７にコマンドを送ることにより、補助電池
パック６を制御し、ＤＣ／ＤＣコンバータ１０を通して
補助電池パック６へ電流を流して電池パック１を所定の
時間予備放電する（ステップＳ１２）。このとき、電池
電圧を監視し（ステップＳ１３）、電池電圧が所定値Ｖ
１以下になったときは、予備放電を終了させて、セル４
の温度が所定値以上か否か（ステップＳ１４）、内部イ
ンピーダンスが所定値以下か否か（ステップＳ１５）を
判断し、セル４の温度が所定値以上か、内部インピーダ
ンスが所定値以下になっている場合には外部ホスト機器
への本放電を開始する。なお、主電池パック１を予備放
電する際、主電池パック１の電池電圧を検出し電池電圧
が所定値Ｖ１以下になったと場合に予備放電を停止し、
電池電圧が所定の電圧Ｖ２以上になった場合に予備放電
を再開させるようにしてもよい。In the above structure, when the main battery pack 1 discharges to the external host device, the temperature of the cell 4 is first monitored by the temperature sensor 5 in the control circuit 2 as shown in FIG. It is determined whether or not the temperature is lower than or equal to a predetermined value (step S11). If the temperature is not lower than or equal to the predetermined value, main discharge to the external host device is started. If the temperature is lower than or equal to the predetermined value, the control circuit 2 disconnects the bus. The auxiliary battery pack 6 is controlled by sending a command to the control circuit 7 of the auxiliary battery pack 6 via the DC / DC converter 10 to supply a current to the auxiliary battery pack 6 to pre-discharge the battery pack 1 for a predetermined time. (Step S12). At this time, the battery voltage is monitored (step S13), and the battery voltage is kept at the predetermined value V.
When it becomes 1 or less, the preliminary discharge is terminated and the cell 4
Whether the temperature of the cell 4 is equal to or higher than a predetermined value (step S14) or the internal impedance is equal to or lower than a predetermined value (step S15), the temperature of the cell 4 is equal to or higher than a predetermined value or the internal impedance is equal to or lower than a predetermined value. If so, the main discharge to the external host device is started. When the main battery pack 1 is pre-discharged, the battery voltage of the main battery pack 1 is detected, and when the battery voltage becomes a predetermined value V1 or less, the pre-discharge is stopped,
The preliminary discharge may be restarted when the battery voltage becomes equal to or higher than the predetermined voltage V2.
【００１３】しかし、セル４の温度が所定値以上にも、
内部インピーダンスが所定値以下にもなっていない場合
には、制御回路２からバスを介して補助電池パック６の
制御回路７にコマンドを送ることにより、補助電池パッ
ク６を制御し、ＤＣ／ＤＣコンバータ１０を通して補助
電池パック６から電流を流して主電池パック１を所定の
時間予備充電する（ステップＳ１６）。このとき、電池
電圧を監視し（ステップＳ１７）、電池電圧が所定値Ｖ
２以上になったときは、予備充電を終了させて、セル４
の温度が所定値以上か否か（ステップＳ１８）、内部イ
ンピーダンスが所定値以下か否か（ステップＳ１９）を
判断し、セル４の温度が所定値以上か、内部インピーダ
ンスが所定値以下になっている場合には外部ホスト機器
への本放電を開始する。しかし、まだ、セル４の温度が
所定値以上にも、内部インピーダンスが所定値以下にも
なっていない場合には、ステップＳ１２に戻って同様の
処理を繰り返し実行する。However, if the temperature of the cell 4 exceeds a predetermined value,
When the internal impedance is not lower than the predetermined value, the control circuit 2 sends a command to the control circuit 7 of the auxiliary battery pack 6 via the bus to control the auxiliary battery pack 6 and to perform the DC / DC converter. A current is supplied from the auxiliary battery pack 6 through 10 to pre-charge the main battery pack 1 for a predetermined time (step S16). At this time, the battery voltage is monitored (step S17), and the battery voltage is set to the predetermined value V.
When it becomes 2 or more, the pre-charge is terminated and the cell 4
Whether the temperature of the cell 4 is equal to or higher than a predetermined value (step S18) or the internal impedance is equal to or lower than a predetermined value (step S19), the temperature of the cell 4 is equal to or higher than a predetermined value or the internal impedance is equal to or lower than a predetermined value. If so, the main discharge to the external host device is started. However, if the temperature of the cell 4 has not reached the predetermined value or higher and the internal impedance has not reached the predetermined value or lower, the process returns to step S12 and the same process is repeated.
【００１４】上記のように外部ホスト機器へ本放電を行
うとき、セル４の温度が所定値以下になっていると、予
備放電又は予備充電又は予備充放電を繰り返し行うこと
により、セル４の温度を上昇させ、しかる後外部ホスト
機器への本放電を開始する。この予備放電又は予備充電
又は予備充放電を行っている間は、外部ホスト機器へ推
定待ち時間の情報やその状態を示す信号（ＢＵＳＹ、予
備放電又は予備充電又は予備充放電中であることを表
す）を送る。補助電池パック６は、主電池パック１から
の信号により充放電可能となるものである。これら予備
充電や予備放電、予備充放電は、主電池パック１のセル
４の温度が所定値以上になったとき、又は主電池パック
１の内部インピーダンスが所定値以下になったとき終了
する。When the temperature of the cell 4 is lower than a predetermined value when the main discharge is performed to the external host device as described above, the temperature of the cell 4 is changed by repeatedly performing the preliminary discharge or the preliminary charge or the preliminary charge / discharge. Then, the main discharge to the external host device is started. While the preliminary discharge, the preliminary charge, or the preliminary charge / discharge is being performed, information indicating the estimated waiting time or a signal indicating the state (BUSY, indicating that the preliminary discharge or the preliminary charge or the preliminary charge / discharge is being performed, is sent to the external host device. ) Is sent. The auxiliary battery pack 6 can be charged and discharged by a signal from the main battery pack 1. The preliminary charging, the preliminary discharging, and the preliminary charging / discharging are finished when the temperature of the cells 4 of the main battery pack 1 becomes a predetermined value or higher, or when the internal impedance of the main battery pack 1 becomes a predetermined value or lower.
【００１５】また、外部ホスト機器へ本放電を行うと
き、主電池パック１が放置されていた期間に応じて予備
放電又は予備充電又は予備充放電を行う期間を長くする
ように制御してもよい。主電池パック１から補助電池パ
ック６へ予備放電する際、補助電池パック６への充電率
は、所定の充電率より小さくしておく。主電池パック１
は、補助電池パック６の開路電圧を検出し、又は補助電
池パック６と通信し、補助電池パック６の充電率を得る
と共に、主電池パック１と補助電池パック６の充電率を
所定の充電率にするよう制御する。そして、主電池パッ
ク１から外部ホスト機器への放電を開始した後、補助電
池パック６は、蓄えられている残容量分を主電池パック
１に充電する。Further, when the main discharge is performed to the external host device, control may be performed so as to lengthen the period for performing the preliminary discharge or the preliminary charge or the preliminary charge / discharge according to the period in which the main battery pack 1 is left unattended. . When performing preliminary discharge from the main battery pack 1 to the auxiliary battery pack 6, the charge rate of the auxiliary battery pack 6 is set to be smaller than a predetermined charge rate. Main battery pack 1
Detects the open circuit voltage of the auxiliary battery pack 6 or communicates with the auxiliary battery pack 6 to obtain the charging rate of the auxiliary battery pack 6 and the charging rates of the main battery pack 1 and the auxiliary battery pack 6 to a predetermined charging rate. Control to Then, after starting the discharge from the main battery pack 1 to the external host device, the auxiliary battery pack 6 charges the main battery pack 1 with the stored remaining capacity.
【００１６】また、主電池パック１は、図３に示すよう
に外部ホスト機器に装着されているか否か（ステップＳ
２１）、外部ホスト機器がバッテリ駆動しているか否か
（ステップＳ２２）、残容量が所定値以下か否か（ステ
ップＳ２３）を判断し、外部ホスト機器に装着されてい
ないとき又は外部ホスト機器がバッテリ駆動していない
ときで、且つ残容量が所定値以下のとき、補助電池パッ
ク６に放電を行い（ステップＳ２４）、主電池パック１
の残容量を０にした後、補助電池パック６から主電池パ
ック１に充電を行って（ステップＳ２５）、その充電量
より残容量を求める（ステップＳ２６）。このことによ
り、主電池パック１は、正確な残容量を検知できるよう
になる。これは、電流積算による容量検出を行っている
場合に有効となる。Further, as shown in FIG. 3, whether the main battery pack 1 is attached to an external host device or not (step S
21), it is determined whether or not the external host device is driven by a battery (step S22) and whether or not the remaining capacity is equal to or less than a predetermined value (step S23), and when it is not attached to the external host device or when the external host device is When the battery is not driven and the remaining capacity is equal to or less than the predetermined value, the auxiliary battery pack 6 is discharged (step S24), and the main battery pack 1 is discharged.
After setting the remaining capacity to 0, the auxiliary battery pack 6 charges the main battery pack 1 (step S25), and the remaining capacity is obtained from the charged amount (step S26). As a result, the main battery pack 1 can accurately detect the remaining capacity. This is effective when the capacitance is detected by integrating the current.
【００１７】予備充電、予備放電、予備充放電の制御
は、上記のように主電池パック１が外部ホスト機器に放
電する場合だけでなく、長期放置による電池の劣化を防
ぐためにも行われる。図４は放置期間や温度を監視して
予備充放電処理を行う処理を説明するための図である。The control of the preliminary charge, the preliminary discharge, and the preliminary charge / discharge is performed not only when the main battery pack 1 is discharged to the external host device as described above, but also to prevent the deterioration of the battery due to being left for a long time. FIG. 4 is a diagram for explaining a process of performing a preliminary charging / discharging process by monitoring a standing period and a temperature.
【００１８】長期放置の監視処理では、図４に示すよう
にタイマによる計時を開始させ（ステップＳ３１）、外
部ホスト機器への本放電や外部の充電器からの充電の有
無を判定して（ステップＳ３２）、充電又は放電中でな
ければ、計測されたセルの温度を記憶すると共に、計時
期間中の温度の平均値を求める（ステップＳ３３）。そ
して、セルの温度が所定値Ｔ１以上か否か（ステップＳ
３４）、ＹＥＳであればさらにセルの温度が所定値Ｔ１
以上になった後の所定値ｔ１以上継続しているか否か
（ステップＳ３５）を判定する。ステップＳ３４、Ｓ３
５でＮＯであれば、温度の平均値が所定値Ｔ２以上であ
るか否かを判定し（ステップＳ３６）、ＹＥＳであれば
長期放置の判定を行う所定値ｔ２を（ステップＳ３
７）、ＮＯであれば長期放置の判定を行う所定値ｔ３を
それぞれ設定して（ステップＳ３８）、タイマによる計
測時間が所定値ｔ２又はｔ３以上か否かを判定する（ス
テップＳ３９）。ＮＯであればステップＳ３２に戻って
計時を続けながら上記の処理を繰り返し実行し、ＹＥＳ
であれば所定の予備放電又は予備充電又は予備充放電を
行う（ステップＳ４０）。In the long-term neglected monitoring process, as shown in FIG. 4, the timer starts the time measurement (step S31), and it is determined whether the main discharge to the external host device or the charge from the external charger is present (step S31). S32), if the cell is not being charged or discharged, the measured cell temperature is stored and the average value of the temperature during the time period is obtained (step S33). Then, whether the cell temperature is equal to or higher than a predetermined value T1 (step S
34), if YES, the cell temperature is further the predetermined value T1.
After the above, it is determined whether or not the predetermined value t1 or more continues (step S35). Steps S34 and S3
If NO in 5, it is determined whether or not the average value of the temperatures is equal to or higher than the predetermined value T2 (step S36), and if YES, the predetermined value t2 for determining long-term leaving (step S3).
7) If NO, a predetermined value t3 for determining long-term neglect is set (step S38), and it is determined whether the time measured by the timer is the predetermined value t2 or t3 or more (step S39). If NO, the process returns to step S32 to repeat the above process while continuing to count the time, and YES
If so, a predetermined preliminary discharge or preliminary charge or preliminary charge / discharge is performed (step S40).
【００１９】すなわち、充電も放電もなく長期放置され
た結果、タイマによる計測時間が所定値ｔ２又はｔ３で
設定された所定の時間以上になると、主電池パック１
は、補助電池パックとの間で予備放電又は予備充電又は
予備充放電を行う。このことにより、長期放置され電池
に不活性物質が生成されるのを抑制するので、不活性物
質が生成され電池が劣化するのを防ぐことができる。こ
のとき、セルの温度の平均値が所定の温度（Ｔ２）以上
である場合の長期放置の判定を行う所定値ｔ２は、そう
でない場合の長期放置の判定を行う所定値ｔ３より短く
する。これは、温度が高いほど電池の劣化が激しいため
の処置である。また、主電池パック１の充電率が満充電
に近ければ近いほど、長期放置の判定を行う所定値ｔ
２、ｔ３を短くし、充電も放電後の経過時間を短くして
予備放電又は予備充電又は予備充放電を行うようにして
もよい。これも満充電状態に近い方が電池の劣化が激し
いための処置である。That is, as a result of being left for a long time without being charged or discharged, when the time measured by the timer becomes equal to or longer than the predetermined time set by the predetermined value t2 or t3, the main battery pack 1
Performs preliminary discharge, preliminary charge, or preliminary charge / discharge with the auxiliary battery pack. This suppresses the generation of an inactive substance in the battery that is left for a long period of time, and thus can prevent the inactive substance from being generated and the battery from deteriorating. At this time, the predetermined value t2 for determining the long-term leaving when the average value of the cell temperature is equal to or higher than the predetermined temperature (T2) is set shorter than the predetermined value t3 for determining the long-term leaving otherwise. This is a measure because the higher the temperature, the more severe the deterioration of the battery. Further, the closer the charging rate of the main battery pack 1 is to the full charge, the more the predetermined value t for determining the long-term leaving is reached.
Preliminary discharge, preliminary charge, or preliminary charge / discharge may be performed by shortening 2, 3 and shortening the elapsed time after discharging for charging. This is also a measure because the closer the battery is to a fully charged state, the more severe the deterioration of the battery.
【００２０】また、ステップＳ３５でＹＥＳ、つまりセ
ルの温度が所定値Ｔ１以上で所定値ｔ１以上継続した場
合にも、所定の予備放電又は予備充電又は予備充放電を
行う（ステップＳ４０）。これも、温度が高いほど電池
の劣化が激しいための処置である。充電又は放電中（ス
テップＳ３２でＹＥＳ）の場合、ステップＳ４０で所定
の予備放電又は予備充電又は予備充放電を行った場合に
は、タイマと温度記憶データをクリアしてステップＳ３
１に戻ってタイマによる計時を再開させ、上記と同様の
処理を繰り返し実行する。If YES in step S35, that is, if the cell temperature is equal to or higher than the predetermined value T1 and continues to be equal to or higher than the predetermined value t1, the predetermined preliminary discharge or preliminary charge or preliminary charge / discharge is performed (step S40). This is also a measure because the higher the temperature, the more severe the deterioration of the battery. If charging or discharging is in progress (YES in step S32), and if predetermined preliminary discharge or preliminary charge or preliminary charge / discharge is performed in step S40, the timer and the temperature storage data are cleared and step S3 is performed.
The procedure returns to 1 to restart the time measurement by the timer, and the same processing as above is repeatedly executed.
【００２１】図５は開路電圧と充放電時の電圧、放電容
量の関係を示す図、図６はパルス充電波形を示す図、図
７は内部インピーダンスと分極による電圧降下の等価回
路を示す図である。FIG. 5 is a diagram showing the relationship between the open circuit voltage, the voltage at the time of charging / discharging, and the discharge capacity, FIG. 6 is a diagram showing a pulse charging waveform, and FIG. 7 is a diagram showing an equivalent circuit of voltage drop due to internal impedance and polarization. is there.
【００２２】主電池パック１は、外部ホスト機器に装着
されていないとき又は外部ホスト機器がバッテリ駆動し
ていないとき、図５に示すように所定の容量分主電池パ
ック１から補助電池パック６に放電を行った後、同容量
分充電し、そのときの充放電時の電圧Ｖｃ、Ｖｄ、電流
Ｉｃ、Ｉｄに基づき内部インピーダンスＲｉと開路電圧
Ｖｏを次の算式を用いて算出し残容量を補正する。When the main battery pack 1 is not attached to the external host device or when the external host device is not driven by the battery, the main battery pack 1 is transferred from the main battery pack 1 to the auxiliary battery pack 6 by a predetermined capacity as shown in FIG. After discharging, charge the same capacity and calculate the internal impedance Ri and open circuit voltage Vo using the following formulas based on the charging / discharging voltage Vc, Vd, currents Ic, Id at that time, and correct the remaining capacity. To do.
【００２３】Ｒｉ＝（Ｖｃ−Ｖｄ）／（Ｉｃ＋Ｉｄ）
Ｖｏ＝Ｖｄ＋Ｒｉ×Ｉｄ 又は Ｖｏ＝Ｖｃ−Ｒｉ×Ｉ
ｃ
開路電圧の算出において、放電初期時は、Ｖｏ＝Ｖｃ−
Ｒｉ×Ｉｃを使用して算出し、開路電圧波形の一部を得
る（分極の影響により開路電圧が不正確になるのを避け
るため）。そして、基準開路電圧波形に基づき電圧値と
傾斜角を比較して現在の放電容量を得、これを満充電か
ら減算して現在の容量値を算出する。主電池パック１が
外部ホスト機器に放電する場合において、主電池パック
１のセル電圧が所定の電圧以下になっても、主電池パッ
ク１の残量が補正容量以上にならない場合は、補助電池
パック６から主電池パック１への充電を行い、見かけ上
の容量値と実容量値を合致させる。Ri = (Vc-Vd) / (Ic + Id) Vo = Vd + Ri * Id or Vo = Vc-Ri * I
c In the calculation of the open circuit voltage, Vo = Vc− at the initial stage of discharge.
Calculate using Ri x Ic to get a portion of the open circuit voltage waveform (to avoid inaccurate open circuit voltage due to polarization effects). Then, the current discharge capacity is obtained by comparing the voltage value and the inclination angle based on the reference open circuit voltage waveform, and this is subtracted from the full charge to calculate the current capacity value. When the main battery pack 1 is discharged to an external host device and the remaining battery charge of the main battery pack 1 does not exceed the correction capacity even if the cell voltage of the main battery pack 1 falls below a predetermined voltage, the auxiliary battery pack The main battery pack 1 is charged from 6 to match the apparent capacity value with the actual capacity value.
【００２４】主電池パック１を外部の充電器から充電す
る場合において、充電開始電圧と充電停止電圧との間で
パルス充電を行い、充電停止電圧に達したとき瞬時的に
主電池パック１から補助電池パック６に放電する。これ
は、充電電圧が所定の充電停止電圧に達し一時的に充電
を停止したとき、図７に示す分極による電圧降下の等価
回路のコンデンサに蓄えられる電荷量により図６（Ａ）
に示すように充電開始電圧に低下するまでの充電ＯＦＦ
の時間が長くなるのを短縮するためであり、この分極に
よる電圧降下の等価回路のコンデンサに蓄えられる電荷
量を瞬時的に補助電池パック６へ放電して０とすると、
図６（Ｂ）に示すように充電時間を短縮することができ
る。When the main battery pack 1 is charged from an external charger, pulse charging is performed between the charge start voltage and the charge stop voltage, and when the charge stop voltage is reached, the main battery pack 1 is instantly supplemented. The battery pack 6 is discharged. This is because the charge amount stored in the capacitor of the equivalent circuit of the voltage drop due to polarization shown in FIG. 7 when the charge voltage reaches a predetermined charge stop voltage and the charge is temporarily stopped, as shown in FIG.
As shown in, charge off until the voltage drops to the charge start voltage
This is to reduce the increase in the time of, and when the amount of charge stored in the capacitor of the equivalent circuit of the voltage drop due to this polarization is instantaneously discharged to the auxiliary battery pack 6 and becomes 0,
The charging time can be shortened as shown in FIG.
【００２５】なお、本発明は、上記実施の形態に限定さ
れるものではなく、種々の変形が可能である。例えば上
記実施の形態では、主電池パック１と補助電池パック６
とを別々の電池パックとしたが、１つの電池パックとし
てもよいし、補助電池パック６を省き、外部から主電池
パック１に対して予備放電又は予備充電又は予備充放電
を行うようにしてもよい。また、主電池パック１の充放
電回路として補助電池パック６にＤＣ／ＤＣコンバータ
を用いたものを示したが、抵抗及びＰＴＣ等の電流制限
素子を用いてもよい。The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above embodiment, the main battery pack 1 and the auxiliary battery pack 6
Although and are separate battery packs, they may be one battery pack, or the auxiliary battery pack 6 may be omitted and the main battery pack 1 may be pre-discharged or pre-charged or pre-charged from the outside. Good. Further, although the DC / DC converter is used for the auxiliary battery pack 6 as the charge / discharge circuit of the main battery pack 1, a current limiting element such as a resistor and a PTC may be used.
【００２６】[0026]
【発明の効果】以上の説明から明らかなように、本発明
によれば、予備充電、予備放電を行う予備充放電手段と
セルの温度を検出する温度検出手段を有し外部ホスト機
器への放電を行う主電池パックにおいて、前記主電池パ
ックが外部ホスト機器へ放電する場合に、前記温度検出
手段により検出される前記セルの温度が所定値以下のと
き、セル電圧が所定値の範囲内で、前記主電池パックか
ら前記予備充放電手段へ所定時間の予備放電を行って前
記セルの温度が所定値以下か否かを判断し、前記セルの
温度が所定値以上になれば前記外部ホスト機器への放電
を行い、前記セルの温度が所定値以上にならなければ前
記主電池パックへ前記予備充放電手段から所定時間の予
備充電を行って前記セルの温度が所定値以下か否かを判
断しつつ前記セルの温度が所定値に達するまで、前記予
備放電と予備充電とを繰り返し行うので、低温時におい
て、電池パックの予備放電、予備充電により、セルの温
度を上昇させてから本放電に移行するため、内部抵抗の
増大による電池電圧の急激な減少及び起動電流不足を解
消することができる。しかも電力の大部分は予備充放電
手段である補助電池パックに蓄えられた後、主電池パッ
クに戻すことができるので、電力のロスを少なくするこ
とができる。As is apparent from the above description, according to the present invention, the precharge / discharge means for precharging and predischarging and the temperature detecting means for detecting the temperature of the cell are provided to discharge to the external host device. In the main battery pack for performing, when the main battery pack is discharged to an external host device, when the temperature of the cell detected by the temperature detecting means is below a predetermined value, the cell voltage is within a predetermined value range, Is the main battery pack
Before performing a pre-discharge for a predetermined time from the
Judge whether the temperature of the cell is below a predetermined value,
Discharge to the external host device if the temperature rises above a certain level
If the temperature of the cell does not rise above the specified value,
The main battery pack should be stored for a predetermined time from the preliminary charging / discharging means.
The battery is charged to determine whether the temperature of the cell is below a specified value.
Since the preliminary discharge and the preliminary charge are repeatedly performed until the temperature of the cell reaches a predetermined value while disconnecting , at the time of low temperature, the primary discharge after increasing the temperature of the cell by the preliminary discharge and the preliminary charge of the battery pack. Therefore, it is possible to solve the sudden decrease in the battery voltage and the insufficient starting current due to the increase in the internal resistance. Moreover, most of the electric power can be returned to the main battery pack after being stored in the auxiliary battery pack which is the preliminary charging / discharging means, so that the power loss can be reduced.
【００２７】[0027]
【００２８】さらに、主電池パックと、該主電池パック
の充放電回路を有する補助電池パックとからなり、予備
放電又は予備充電又は予備充放電は、主電池パックと補
助電池パックとの間で行うので、補助電池パックは、Ｄ
Ｃ／ＤＣコンバータを内蔵することにより、主電池パッ
クを充電することができると共に、非常時用の充電器と
しても活用できる。主電池パックは、外部ホスト機器が
装着されていないとき又は外部ホスト機器がバッテリ駆
動していないときで、且つ残容量が所定値以下のとき補
助電池パックに放電を行って残容量を０にした後、補助
電池パックから充電を行い、外部ホスト機器が装着され
ていないとき又は外部ホスト機器がバッテリ駆動してい
ないときに補助電池パックと所定容量分の充放電を行う
ことにより、内部インピーダンスと開路電圧を算出し、
補助電池パックは、主電池パックから外部ホスト機器へ
の放電を開始した後、残容量分を主電池パックに充電す
るので、主電池パックの容量補正も容易に行える。Further, it comprises a main battery pack and an auxiliary battery pack having a charging / discharging circuit for the main battery pack, and preliminary discharge or preliminary charge or preliminary charge / discharge is carried out between the main battery pack and the auxiliary battery pack. Therefore, the auxiliary battery pack is D
By incorporating the C / DC converter, the main battery pack can be charged and can also be used as an emergency charger. The main battery pack discharges the auxiliary battery pack to zero when the external host device is not attached or when the external host device is not driven by the battery and the remaining capacity is less than a predetermined value. After that, the internal impedance and the open circuit are charged by charging from the auxiliary battery pack and charging / discharging the auxiliary battery pack and the specified capacity when the external host device is not attached or when the external host device is not operating on the battery. Calculate the voltage,
Since the auxiliary battery pack charges the remaining capacity of the main battery pack after starting the discharge from the main battery pack to the external host device, the capacity of the main battery pack can be easily corrected.
【図１】 本発明に係る電池パック電源装置の実施の形
態を示す図である。FIG. 1 is a diagram showing an embodiment of a battery pack power supply device according to the present invention.
【図２】 外部ホスト機器へ本放電を開始する際に温度
に応じて行う予備充放電処理を説明するための図であ
る。FIG. 2 is a diagram for explaining a preliminary charging / discharging process performed according to a temperature when starting a main discharge to an external host device.
【図３】 外部ホスト機器へ本放電を開始した後の充放
電処理を説明するための図である。FIG. 3 is a diagram for describing charge / discharge processing after starting main discharge to an external host device.
【図４】 放置期間や温度を監視して予備充放電処理を
行う処理を説明するための図である。FIG. 4 is a diagram for explaining a process of performing a preliminary charging / discharging process by monitoring a standing period and a temperature.
【図５】 開路電圧と充放電時の電圧、放電容量の関係
を示す図である。FIG. 5 is a diagram showing a relationship between an open circuit voltage, a charge / discharge voltage, and a discharge capacity.
【図６】 パルス充電波形を示す図である。FIG. 6 is a diagram showing a pulse charge waveform.
【図７】 内部インピーダンスと分極による電圧降下の
等価回路を示す図である。FIG. 7 is a diagram showing an equivalent circuit of a voltage drop due to internal impedance and polarization.
１…主電池パック、２、７…制御回路、３、８…充放電
用ＦＥＴ、４、９…セル、５…温度センサ、６…補助電
池パック、１０…ＤＣ／ＤＣコンバータ1 ... Main battery pack, 2, 7 ... Control circuit, 3, 8 ... Charge / discharge FET, 4, 9 ... Cell, 5 ... Temperature sensor, 6 ... Auxiliary battery pack, 10 ... DC / DC converter
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平11−26032（ＪＰ，Ａ) 特開 平８−98304（ＪＰ，Ａ) 特開 平９−271141（ＪＰ，Ａ) 特開 平６−30532（ＪＰ，Ａ) 特開 平11−109452（ＪＰ，Ａ) 特開2001−273934（ＪＰ，Ａ) 特開 平８−149709（ＪＰ，Ａ) 特開 平３−145935（ＪＰ，Ａ) 特開 平８−289478（ＪＰ，Ａ) 特開 平６−315234（ＪＰ，Ａ) 特開 平２−15580（ＪＰ，Ａ) 実開 平６−84753（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 7/00 - 7/10 H01M 10/44 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-11-26032 (JP, A) JP-A-8-98304 (JP, A) JP-A-9-271141 (JP, A) JP-A-6- 30532 (JP, A) JP 11-109452 (JP, A) JP 2001-273934 (JP, A) JP 8-149709 (JP, A) JP 3-145935 (JP, A) Kaihei 8-289478 (JP, A) JP 6-315234 (JP, A) JP 2-15580 (JP, A) Actual Kai 6-84753 (JP, U) (58) Fields investigated (58) Int.Cl. 7 , DB name) H02J 7/ 00-7/10 H01M 10/44
Claims (7)
段とセルの温度を検出する温度検出手段を有し外部ホス
ト機器への放電を行う主電池パックにおいて、前記主電
池パックが外部ホスト機器へ放電する場合に、前記温度
検出手段により検出される前記セルの温度が所定値以下
のとき、セル電圧が所定値の範囲内で、前記主電池パッ
クから前記予備充放電手段へ所定時間の予備放電を行っ
て前記セルの温度が所定値以下か否かを判断し、前記セ
ルの温度が所定値以上になれば前記外部ホスト機器への
放電を行い、前記セルの温度が所定値以上にならなけれ
ば前記主電池パックへ前記予備充放電手段から所定時間
の予備充電を行って前記セルの温度が所定値以下か否か
を判断しつつ前記セルの温度が所定値に達するまで、前
記予備放電と予備充電とを繰り返し行うことを特徴とす
る電池パック電源装置。1. A main battery pack which has a precharge / discharge means for precharging and precharging and a temperature detecting means for detecting the temperature of a cell to discharge to an external host device, wherein the main battery pack is an external host device. When the temperature of the cell detected by the temperature detecting means is equal to or lower than a predetermined value during the discharge to the main battery pack within the range of the predetermined value.
From the battery to the preliminary charging / discharging means for a predetermined time.
Determine whether the temperature of the cell is below a predetermined value by
If the temperature of the battery exceeds a specified value,
After discharging, the temperature of the cell must be above a specified value.
If the main battery pack has a predetermined time from the preliminary charging / discharging means
Whether the temperature of the cell is below a specified value after pre-charging
The battery pack power supply device, characterized in that the preliminary discharge and the preliminary charge are repeatedly performed until the temperature of the cell reaches a predetermined value while making a judgment .
クの充放電回路を有する補助電池パックからなり、前記
主電池パックと前記補助電池パックとの間で前記予備充
電、予備放電を行うことを特徴とする請求項１記載の電
池パック電源装置。2. The preliminary charging / discharging means comprises an auxiliary battery pack having a charging / discharging circuit for the main battery pack, and performs the preliminary charging / preliminary discharging between the main battery pack and the auxiliary battery pack. The battery pack power supply device according to claim 1, wherein:
タであることを特徴とする請求項２記載の電池パック電
源装置。3. The battery pack power supply device according to claim 2 , wherein the charge / discharge circuit is a DC / DC converter.
装着されていないとき又は外部ホスト機器がバッテリ駆
動していないときで、且つ残容量が所定値以下のとき補
助電池パックに放電を行って残容量を０にした後、補助
電池パックから充電を行うことを特徴とする請求項２記
載の電池パック電源装置。4. The main battery pack discharges the auxiliary battery pack when an external host device is not attached or when the external host device is not battery-operated and when the remaining capacity is below a predetermined value. The battery pack power supply device according to claim 2 , wherein the auxiliary battery pack is charged after the remaining capacity is set to zero.
装着されていないとき又は外部ホスト機器がバッテリ駆
動していないときに補助電池パックと所定容量分の充放
電を行うことにより、内部インピーダンスと開路電圧を
算出することを特徴とする請求項２記載の電池パック電
源装置。5. The internal impedance of the main battery pack is changed by charging and discharging a predetermined capacity with the auxiliary battery pack when the external host device is not mounted or when the external host device is not driven by a battery. The battery pack power supply device according to claim 2, wherein the open circuit voltage is calculated.
ら外部ホスト機器への放電を開始した後、残容量分を主
電池パックに充電することを特徴とする請求項２記載の
電池パック電源装置。6. The battery pack power supply device according to claim 2 , wherein the auxiliary battery pack charges the main battery pack with the remaining capacity after starting the discharge from the main battery pack to the external host device. .
電開始電圧と充電停止電圧との間でパルス充電を行い、
前記充電停止電圧に達したとき瞬時的に放電を行うこと
を特徴とする請求項１ないし６のいずれかに記載の電池
パック電源装置。7. In charging the main battery pack, pulse charging is performed between a charge start voltage and a charge stop voltage,
Battery pack power supply device according to any one of claims 1 to 6, characterized in that the instantaneously discharged when reaching the charge stop voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15720799A JP3401517B2 (en) | 1999-06-04 | 1999-06-04 | Battery pack power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15720799A JP3401517B2 (en) | 1999-06-04 | 1999-06-04 | Battery pack power supply |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002310011A Division JP2003143769A (en) | 2002-10-24 | 2002-10-24 | Battery pack power supply apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000350370A JP2000350370A (en) | 2000-12-15 |
| JP3401517B2 true JP3401517B2 (en) | 2003-04-28 |
Family
ID=15644558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15720799A Expired - Lifetime JP3401517B2 (en) | 1999-06-04 | 1999-06-04 | Battery pack power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3401517B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3566252B2 (en) * | 2001-12-12 | 2004-09-15 | 本田技研工業株式会社 | Hybrid vehicle and control method thereof |
| JP4432985B2 (en) * | 2007-03-12 | 2010-03-17 | ソニー株式会社 | Battery pack |
| JP2009247057A (en) * | 2008-03-28 | 2009-10-22 | Fuji Heavy Ind Ltd | Electric vehicle control device |
| WO2010125649A1 (en) * | 2009-04-28 | 2010-11-04 | トヨタ自動車株式会社 | Charge holding method for lithium-ion secondary battery, battery system, vehicle, and battery-mounted device |
| CN103178600A (en) * | 2011-12-21 | 2013-06-26 | 鸿富锦精密工业（深圳）有限公司 | Power source management system and method |
| JP6354822B2 (en) * | 2016-11-25 | 2018-07-11 | マツダ株式会社 | In-vehicle battery control device and in-vehicle battery control method |
| JP6354823B2 (en) * | 2016-11-25 | 2018-07-11 | マツダ株式会社 | In-vehicle battery control device and in-vehicle battery control method |
| WO2019230158A1 (en) * | 2018-05-31 | 2019-12-05 | 住友電気工業株式会社 | Temperature raising device for secondary battery, computer program, and method for raising temperature of secondary battery |
| CN112332514B (en) * | 2020-10-21 | 2023-11-28 | 深圳供电局有限公司 | Storage battery charge and discharge control system and method |
| CN115459412B (en) * | 2022-11-10 | 2023-03-24 | 苏州绿恺动力电子科技有限公司 | Battery pre-discharge control system and control method |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH088116B2 (en) * | 1988-07-01 | 1996-01-29 | トヨタ自動車株式会社 | Complete discharge method for equalization of metal / halogen battery and metal / halogen battery used for the same |
| JP2734689B2 (en) * | 1989-10-31 | 1998-04-02 | 松下電器産業株式会社 | Charging device |
| JPH0630532A (en) * | 1992-07-08 | 1994-02-04 | Toyota Autom Loom Works Ltd | Charger |
| JP3369628B2 (en) * | 1993-04-28 | 2003-01-20 | 三洋電機株式会社 | How to charge the battery |
| JP2602980Y2 (en) * | 1993-05-07 | 2000-02-07 | 神鋼電機株式会社 | Charge control device |
| JP3448978B2 (en) * | 1994-09-20 | 2003-09-22 | 日産自動車株式会社 | Electric vehicle charging control device |
| JPH08149709A (en) * | 1994-11-21 | 1996-06-07 | Shin Kobe Electric Mach Co Ltd | Rechargeable battery charger |
| JP3239040B2 (en) * | 1995-04-11 | 2001-12-17 | 三洋電機株式会社 | Rechargeable battery charging method |
| JPH09271141A (en) * | 1996-03-29 | 1997-10-14 | Mitsubishi Electric Corp | Distributed power supply system |
| JP4120025B2 (en) * | 1997-07-02 | 2008-07-16 | 日産自動車株式会社 | Battery heating device for electric vehicles |
| JP3814383B2 (en) * | 1997-09-29 | 2006-08-30 | キヤノン株式会社 | camera |
| JP2001273934A (en) * | 2000-01-21 | 2001-10-05 | Japan Storage Battery Co Ltd | Operation method of non-aqueous electrolyte battery and battery device |
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1999
- 1999-06-04 JP JP15720799A patent/JP3401517B2/en not_active Expired - Lifetime
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|---|---|
| JP2000350370A (en) | 2000-12-15 |
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