JP4079428B2 - Battery pack - Google Patents

Battery pack Download PDF

Info

Publication number
JP4079428B2
JP4079428B2 JP2003147078A JP2003147078A JP4079428B2 JP 4079428 B2 JP4079428 B2 JP 4079428B2 JP 2003147078 A JP2003147078 A JP 2003147078A JP 2003147078 A JP2003147078 A JP 2003147078A JP 4079428 B2 JP4079428 B2 JP 4079428B2
Authority
JP
Japan
Prior art keywords
cell
voltage
switch
battery
voltage adjustment
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
Application number
JP2003147078A
Other languages
Japanese (ja)
Other versions
JP2004349186A (en
Inventor
和久 永瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokin Corp
Original Assignee
NEC Tokin Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Tokin Corp filed Critical NEC Tokin Corp
Priority to JP2003147078A priority Critical patent/JP4079428B2/en
Publication of JP2004349186A publication Critical patent/JP2004349186A/en
Application granted granted Critical
Publication of JP4079428B2 publication Critical patent/JP4079428B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、複数直列のセル組にて構成される電池パックに関する。
【0002】
【従来の技術】
複数直列接続されたセル組により構成される電池パックにおいて、セル組を実施する時に微小なセル電圧崩れがあると、充放電を繰り返すことにより、セル電圧崩れが大きくなる場合がある。直列数が増えれば、セル電圧崩れの発生する可能性も大きくなる。
【0003】
各セルの電圧が崩れた場合、満充電時には、セルの電圧が最も高い(充電量が多い)セルにより充電が停止され、放電終止は、セルの電圧が最も低い(充電量が少ない)セルによって判断されるため、セル電圧崩れが大きくなると、セル組全体の容量は、各セルが本来持っている容量よりも小さくなってしまう。
【0004】
そこで、本来の容量に戻すために、トリクル充電してそれぞれの電圧を検出し、所定のバランス電圧より高いセルをバランス放電させることにより、各セル電圧を揃えるようにする方法が提案されている(例えば、特許文献1参照)。
【0005】
【特許文献1】
特開2000−106220号公報
【0006】
【発明が解決しようとする課題】
しかし、従来提案されている方法において、セル電圧が崩れたのを検知するのは放電末期電圧よりセル電圧が下がった場合のみで、容量の領域の中央付近にて充放電サイクルを繰り返している場合には、ほとんど動作することがない。したがって、実使用ではあまり動作しないことになり、動作した場合には、電圧差が大きくなってからとなる。そのため、セル電圧の調整に時間がかかり、充電時間が非常に長くなるという不具合が生じる。
【0007】
【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、抵抗の発熱等も抑え、セル電圧を効率良く調整できるようにするものである。
【0008】
そのために本発明は、複数直列のセル組にて構成される電池パックにおいて、各セルに並列に接続されるセル電圧調整スイッチと抵抗からなるセル電圧調整回路と、前記セル組と出力端子との間に接続される電池オン/オフ制御スイッチと、前記電池オン/オフ制御スイッチに並列に接続されるプリチャージスイッチと抵抗からなるプリチャージ回路と、充電中に各セルの電圧を測定して最大値と最小値との電圧差が一定値を越えたとき電圧が最も低いセル以外のセルに対応する前記セル電圧調整スイッチをオンにする制御回路とを備えたことを特徴とするものである。
【0009】
さらに、充電中に各セルの電圧を測定して最大値と最小値との電圧差が一定値を越えたとき電圧が最も低いセル以外のセルに対応する前記セル電圧調整スイッチをオンにすると共に、前記セル電圧調整スイッチをオンにした状態を保持したまま一定時間ウエイトした後全セルのセル電圧調整スイッチをオフにする制御回路とを備えたことを特徴とし、前記制御回路は、セル電圧調整スイッチをオンにして充電を行う場合には、前記電池オン/オフ制御スイッチをオフにし前記プリチャージスイッチをオンにすることを特徴とするものである。
【0010】
【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の実施の形態を示す図であり、1はセル組、2はセル電圧調整スイッチ、3は電池On/Off制御スイッチ、4はプリチャージ回路、5は制御回路を示す。
【0011】
図1において、セル組1は、複数のセルを直列に接続した複数直列のセル組であり、各セルには、それぞれ並列にセル電圧調整スイッチ2と抵抗とからなるセル電圧調整回路が接続され、セル電圧調整スイッチ2のオンによりそのセルと並列に抵抗が接続される。そのセルと並列に接続された抵抗が充電電流をバイパスすることによりセル電圧の調整が行われる。
【0012】
セル組1と出力(+)との間には、電池On/Off制御スイッチ3が接続され、さらにその電池On/Off制御スイッチ3に並列にプリチャージスイッチと抵抗からなるプリチャージ回路4が接続される。電池On/Off制御スイッチ3は、本充放電のオン/オフを行うものであり、プリチャージ回路4では、セルの電圧が低くなりすぎた場合や充電開始時に、微小な電流で充電を行う場合にプリチャージスイッチがオンされ、抵抗を通したプリチャージが実行される。
【0013】
制御回路5は、充電、放電、放置(充電も放電もしていない状態)、電圧、電流、各セル間のバラツキなどを検知し、セル電圧調整スイッチ2、電池On/Off制御スイッチ3、プリチャージ回路4のプリチャージスイッチのオン/オフにより各種制御を行うものである。例えば過大な電流が流れた場合には、電池On/Off制御スイッチ3をオフに制御して電流を遮断し、また、セルの電圧が低くなりすぎた場合や充電開始時に、微小な電流で充電を行えるように、プリチャージ回路4のプリチャージスイッチと電池On/Off制御スイッチ3のオン/オフを制御してプリチャージを行う。さらに、充放電の回数が増え、各セルの電圧がバラツキ始め、最大と最小の電圧差がある一定の範囲を超えた場合には、セル電圧調整スイッチ2のオン/オフを制御する。
【0014】
上記のように本実施形態では、出力(+)−(−)より本電池パックの充放電が行われ、電池パックの制御回路5により電池パックが危険な状態になる前に、充放電が停止される。また、セルの電圧が低くなりすぎた場合や充電開始時に、微小な電流で充電を行うためのプリチャージ回路4が内蔵される。さらに各直列毎のセルにセルの電圧崩れが発生したときに、電圧を調整できるよう、セルをショートする形で抵抗が挿入され、それを制御するためのセル電圧調整スイッチ2が挿入される。なお、図示していないが、各セルの電圧を測定する回路、充放電電流を測定する回路も本電池パックに内蔵される。
【0015】
そして、直列接続の各セルの電圧が崩れた場合、充電中に電圧が最も低いセル以外のセルに流れる電流を、各セルに並列に接続したセル電圧調整スイッチ2をオンにすることにより抵抗にバイパスさせ、電圧が最も低いセルのみ充電を実施する。他方、このときプリチャージ機能を用い、電池On/Off制御スイッチ3をオフにしてプリチャージ回路4のプリチャージスイッチをオンにすることにより充電電流を少なく制限する。このことにより、充電電流を少なく制限して、バイパスする電流も小さくするので、セルに並列に接続されるセル電圧調整回路の抵抗値を大きくすることができ、抵抗の発熱等も抑え、セル電圧を効率良く調整することができる。
【0016】
因みに定格充電の大部分の電流をバイパスさせるには、セルに並列に接続する抵抗を小さくする必要があり、例えばセルの電圧3.6V、充電電流2Aとし、全ての電流を抵抗に流すとすると、抵抗は1.8Ω、電力量は7.2W、実際には10W程度の定格の抵抗を使うことになり、安全性(発熱等)の確保も難しく現実的なものにはならない。セル電圧崩れの修正効果は少なくなるが、安全性と比較的安価な部品ということで選定を行うと抵抗値は大きくなる。プリチャージ機能を用いると、充電電流を小さく制限し、充電時間の延長によるセル電圧崩れの修正時間も長くなるが、バイパス電流が小さくてもセル電圧崩れの修正の効果も上がる。
【0017】
図2は制御回路による制御フローを説明するための図であり、まず、各セル電圧の測定を実施し(ステップS1)、セルの最小電圧と最大電圧の差が、例えば30mV以上あるか否かを判定する(ステップS2)。
【0018】
YESの場合(セルの最小電圧と最大電圧の差が30mV以上ある場合)には、プリチャージ回路4のプリチャージスイッチをオン、電池On/Off制御スイッチ3をオフにして、充電電流を制限しバランス回路動作準備を行う。同時に、最小電圧のセル以外のセル電圧調整スイッチ2をオンにして、最小電圧のセル以外のセルに流れる充電電流をバイパスし、最小電圧のセルとそれ以外のセルの充電電流に差をつけ、電圧差を小さくする方向に充電を行う(ステップS3)。
【0019】
ステップS3の制御状態を保持したまま一定時間ウエイトした後(ステップS4)、全セルのセル電圧調整スイッチ2をオフにしてバイパスしていた最小電圧のセル以外のセルの電流を通常に戻すことにより、通常状態に復帰させ(ステップS5)、ステップS1に戻り同様の制御を繰り返し実行する。
【0020】
他方、ステップS2の判定処理がNOの場合(セルの最小電圧と最大電圧の差が30mV以上ない場合)には、プリチャージ回路4のプリチャージスイッチをオフ、電池On/Off制御スイッチ3をオンにし、全セルのセル電圧調整スイッチ2をオフにする(ステップS6)。つまり、電圧差がないので、プリチャージ回路4のプリチャージスイッチ、セル電圧調整スイッチ2を共にオフにして通常状態とし、ステップS1に戻り同様の制御を繰り返し実行する。
【0021】
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、セル電圧調整スイッチ2をオンにして充電中に電圧が最も低いセル以外に流れる電流を抵抗にバイパスさせて電圧が最も低いセルのみ充電を実施したが、充電開始に先立って電圧が最も高いセルのみセル電圧調整スイッチ2を一定時間オンにした後、充電を実行するように制御してもよい。
【0022】
【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、直列接続の各セルの電圧が崩れた場合、充電中に電圧が最も低いセル以外に流れる電流を各セルに並列に接続した抵抗にバイパスさせて、電圧が最も低いセルのみ充電を実施することで、セル電圧崩れを修正することができ、本来の容量を取り戻すことができる。
【0023】
その際、定格充電の大部分の電流をバイパスさせるには、セルに並列に接続される抵抗を小さくすることが必要になり、現実的なものにならないが、プリチャージ機能を用いて充電電流を小さく制限することにより、セルに並列に接続されるセル電圧調整回路の抵抗値を大きくすることができ、抵抗の発熱等も抑え、セル電圧を効率良く調整することができる。
【図面の簡単な説明】
【図1】 本発明に係る電池パックの実施の形態を示す図である。
【図2】 制御回路による制御フローを説明するための図である。
【符号の説明】
1…セル組、2…セル電圧調整スイッチ、3…電池On/Off制御スイッチ、4…プリチャージ回路、5…制御回路
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery pack composed of a plurality of series cell sets.
[0002]
[Prior art]
In a battery pack composed of a plurality of cell groups connected in series, if there is a minute cell voltage collapse when the cell group is implemented, the cell voltage collapse may increase due to repeated charge and discharge. As the number of series increases, the possibility of cell voltage collapse increases.
[0003]
When the voltage of each cell collapses, when fully charged, charging is stopped by the cell with the highest cell voltage (high charge amount), and the end of discharge is stopped by the cell with the lowest cell voltage (low charge amount). As a result, if the cell voltage collapse increases, the capacity of the entire cell set becomes smaller than the capacity inherent in each cell.
[0004]
Therefore, in order to return to the original capacity, a method has been proposed in which each cell voltage is made uniform by trickle charging, detecting each voltage, and performing balance discharge on cells higher than a predetermined balance voltage ( For example, see Patent Document 1).
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-106220
[Problems to be solved by the invention]
However, in the conventionally proposed method, the cell voltage is detected only when the cell voltage falls below the end-of-discharge voltage, and when the charge / discharge cycle is repeated near the center of the capacity region. Almost never work. Therefore, it does not operate so much in actual use, and when it operates, it becomes after the voltage difference becomes large. Therefore, it takes time to adjust the cell voltage, resulting in a problem that the charging time becomes very long.
[0007]
[Means for Solving the Problems]
The present invention solves the above-described problems, and suppresses heat generation of a resistor and enables the cell voltage to be adjusted efficiently.
[0008]
Therefore, the present invention provides a battery pack composed of a plurality of series cell sets, a cell voltage adjustment switch including a cell voltage adjustment switch and a resistor connected in parallel to each cell, and the cell set and an output terminal. A battery on / off control switch connected in between, a precharge circuit connected in parallel to the battery on / off control switch and a resistor, and a maximum voltage by measuring the voltage of each cell during charging And a control circuit that turns on the cell voltage adjustment switch corresponding to a cell other than the cell having the lowest voltage when the voltage difference between the value and the minimum value exceeds a certain value .
[0009]
In addition, the voltage difference to turn on the cell voltage adjusting switch corresponding to the cell other than the lowest cell voltage when exceeding the predetermined value between the maximum value and the minimum value voltage measured by the in each cell during charging And a control circuit for turning off the cell voltage adjustment switches of all cells after waiting for a predetermined time while maintaining the state where the cell voltage adjustment switch is turned on. When charging is performed with the adjustment switch turned on, the battery on / off control switch is turned off and the precharge switch is turned on.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a battery pack according to the present invention, where 1 is a cell set, 2 is a cell voltage adjustment switch, 3 is a battery On / Off control switch, 4 is a precharge circuit, and 5 is a control circuit. Indicates.
[0011]
In FIG. 1, a cell set 1 is a plurality of series cell sets in which a plurality of cells are connected in series, and a cell voltage adjustment circuit including a cell voltage adjustment switch 2 and a resistor is connected in parallel to each cell. When the cell voltage adjustment switch 2 is turned on, a resistor is connected in parallel with the cell. The cell voltage is adjusted by the resistor connected in parallel with the cell bypassing the charging current.
[0012]
A battery On / Off control switch 3 is connected between the cell set 1 and the output (+), and a precharge circuit 4 including a precharge switch and a resistor is connected in parallel to the battery On / Off control switch 3. Is done. The battery On / Off control switch 3 turns on / off the main charge / discharge, and the precharge circuit 4 charges the battery with a small current when the cell voltage becomes too low or when charging starts. The precharge switch is turned on and precharge through the resistor is executed.
[0013]
The control circuit 5 detects charge, discharge, neglect (state of neither charging nor discharging), voltage, current, variation between cells, and the like, and the cell voltage adjustment switch 2, battery On / Off control switch 3, precharge Various controls are performed by turning on / off the precharge switch of the circuit 4. For example, when an excessive current flows, the battery On / Off control switch 3 is turned off to cut off the current, and when the cell voltage becomes too low or at the start of charging, the battery is charged with a small current. Is performed by controlling on / off of the precharge switch of the precharge circuit 4 and the battery On / Off control switch 3. Further, when the number of times of charging / discharging increases, the voltage of each cell starts to vary, and the difference between the maximum and minimum voltages exceeds a certain range, the on / off of the cell voltage adjustment switch 2 is controlled.
[0014]
As described above, in the present embodiment, charging / discharging of the battery pack is performed from the outputs (+) − (−), and charging / discharging is stopped before the battery pack is in a dangerous state by the control circuit 5 of the battery pack. Is done. In addition, a precharge circuit 4 for charging with a minute current is incorporated when the cell voltage becomes too low or at the start of charging. Further, when cell voltage collapse occurs in each cell in each series, a resistor is inserted so as to short-circuit the cell so that the voltage can be adjusted, and a cell voltage adjustment switch 2 for controlling it is inserted. Although not shown, a circuit for measuring the voltage of each cell and a circuit for measuring charge / discharge current are also incorporated in the battery pack.
[0015]
When the voltage of each cell connected in series collapses, the current flowing in the cells other than the cell with the lowest voltage during charging is turned on by turning on the cell voltage adjustment switch 2 connected in parallel to each cell. Bypass, charge only the cell with the lowest voltage. On the other hand, by using the precharge function at this time, the battery On / Off control switch 3 is turned off and the precharge switch of the precharge circuit 4 is turned on to limit the charging current to a small amount. As a result, the charging current is limited to a small amount, and the bypass current is also reduced, so that the resistance value of the cell voltage adjustment circuit connected in parallel to the cell can be increased, the resistance heat generation is suppressed, and the cell voltage is reduced. Can be adjusted efficiently.
[0016]
Incidentally, in order to bypass most of the current of the rated charge, it is necessary to reduce the resistance connected in parallel with the cell. For example, if the cell voltage is 3.6 V and the charging current is 2 A, all current flows through the resistor. The resistance is 1.8Ω, the amount of power is 7.2W, and a resistance with a rating of about 10W is actually used, and it is difficult to ensure safety (heat generation, etc.), which is not practical. Although the effect of correcting the cell voltage collapse is reduced, the resistance value is increased if selection is made because of safety and relatively inexpensive parts. When the precharge function is used, the charging current is limited to be small, and the correction time for cell voltage collapse due to the extension of the charging time is lengthened. However, even if the bypass current is small, the effect of correcting the cell voltage collapse is improved.
[0017]
FIG. 2 is a diagram for explaining a control flow by the control circuit. First, each cell voltage is measured (step S1), and whether or not the difference between the minimum voltage and the maximum voltage of the cell is, for example, 30 mV or more. Is determined (step S2).
[0018]
In the case of YES (when the difference between the minimum voltage and the maximum voltage of the cell is 30 mV or more), the precharge switch of the precharge circuit 4 is turned on and the battery On / Off control switch 3 is turned off to limit the charging current. Prepare for balance circuit operation. At the same time, the cell voltage adjustment switch 2 other than the cell with the lowest voltage is turned on to bypass the charging current flowing through the cells other than the cell with the lowest voltage, and the charging current between the cell with the lowest voltage and the other cells is differentiated. Charging is performed in a direction to reduce the voltage difference (step S3).
[0019]
After waiting for a certain time while maintaining the control state of step S3 (step S4), the cell voltage adjustment switch 2 of all cells is turned off to return the currents of cells other than the bypassed minimum voltage cells to normal. Then, the normal state is restored (step S5), the process returns to step S1 and the same control is repeatedly executed.
[0020]
On the other hand, when the determination process of step S2 is NO (when the difference between the minimum voltage and the maximum voltage of the cell is not 30 mV or more), the precharge switch of the precharge circuit 4 is turned off and the battery On / Off control switch 3 is turned on. Then, the cell voltage adjustment switches 2 of all cells are turned off (step S6). That is, since there is no voltage difference, both the precharge switch 4 of the precharge circuit 4 and the cell voltage adjustment switch 2 are turned off to return to the normal state, and the same control is repeatedly executed by returning to step S1.
[0021]
In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the above-described embodiment, the cell voltage adjustment switch 2 is turned on, and the current flowing outside the cell having the lowest voltage is bypassed by the resistor during charging, and only the cell having the lowest voltage is charged. Thus, only the cell having the highest voltage may be controlled to perform charging after the cell voltage adjustment switch 2 is turned on for a certain period of time.
[0022]
【The invention's effect】
As is clear from the above description, according to the present invention, when the voltage of each cell connected in series collapses, the current that flows except for the cell with the lowest voltage during charging is bypassed to the resistor connected in parallel to each cell. By charging only the cell with the lowest voltage, the cell voltage collapse can be corrected and the original capacity can be recovered.
[0023]
At that time, in order to bypass most of the rated charge current, it is necessary to reduce the resistance connected in parallel with the cell, which is not practical, but the precharge function is used to reduce the charge current. By limiting it to a small value, the resistance value of the cell voltage adjusting circuit connected in parallel to the cell can be increased, the heat generation of the resistor can be suppressed, and the cell voltage can be adjusted efficiently.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a battery pack according to the present invention.
FIG. 2 is a diagram for explaining a control flow by a control circuit;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Cell group, 2 ... Cell voltage adjustment switch, 3 ... Battery On / Off control switch, 4 ... Precharge circuit, 5 ... Control circuit

Claims (3)

複数直列のセル組にて構成される電池パックにおいて、各セルに並列に接続されるセル電圧調整スイッチと抵抗からなるセル電圧調整回路と、前記セル組と出力端子との間に接続される電池オン/オフ制御スイッチと、前記電池オン/オフ制御スイッチに並列に接続されるプリチャージスイッチと抵抗からなるプリチャージ回路と、充電中に各セルの電圧を測定して最大値と最小値との電圧差が一定値を越えたとき電圧が最も低いセル以外のセルに対応する前記セル電圧調整スイッチをオンにする制御回路とを備えたことを特徴とする電池パック。In a battery pack composed of a plurality of series cell sets, a cell voltage adjustment circuit including a cell voltage adjustment switch and a resistor connected in parallel to each cell, and a battery connected between the cell set and an output terminal An on / off control switch, a precharge switch connected in parallel to the battery on / off control switch, and a resistor; and a maximum value and a minimum value obtained by measuring the voltage of each cell during charging. And a control circuit for turning on the cell voltage adjustment switch corresponding to a cell other than the cell having the lowest voltage when the voltage difference exceeds a certain value . 複数直列のセル組にて構成される電池パックにおいて、各セルに並列に接続されるセル電圧調整スイッチと抵抗からなるセル電圧調整回路と、前記セル組と出力端子との間に接続される電池オン/オフ制御スイッチと、前記電池オン/オフ制御スイッチに並列に接続されるプリチャージスイッチと抵抗からなるプリチャージ回路と、充電中に各セルの電圧を測定して最大値と最小値との電圧差が一定値を越えたとき電圧が最も低いセル以外のセルに対応する前記セル電圧調整スイッチをオンにすると共に、前記セル電圧調整スイッチをオンにした状態を保持したまま一定時間ウエイトした後全セルのセル電圧調整スイッチをオフにする制御回路とを備えたことを特徴とする電池パック。In a battery pack composed of a plurality of series cell sets, a cell voltage adjustment circuit including a cell voltage adjustment switch and a resistor connected in parallel to each cell, and a battery connected between the cell set and an output terminal An on / off control switch, a precharge switch connected in parallel to the battery on / off control switch, and a resistor; and a maximum value and a minimum value obtained by measuring the voltage of each cell during charging. After the voltage difference exceeds a certain value, the cell voltage adjustment switch corresponding to a cell other than the cell having the lowest voltage is turned on, and after waiting for a certain time while keeping the cell voltage adjustment switch on. A battery pack comprising a control circuit for turning off cell voltage adjustment switches of all cells . 前記制御回路は、セル電圧調整スイッチをオンにして充電を行う場合には、前記電池オン/オフ制御スイッチをオフにし前記プリチャージスイッチをオンにすることを特徴とする請求項1又は2記載の電池パック。  3. The control circuit according to claim 1, wherein when the battery is charged by turning on a cell voltage adjustment switch, the control circuit turns off the battery on / off control switch and turns on the precharge switch. 4. Battery pack.
JP2003147078A 2003-05-26 2003-05-26 Battery pack Expired - Lifetime JP4079428B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003147078A JP4079428B2 (en) 2003-05-26 2003-05-26 Battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003147078A JP4079428B2 (en) 2003-05-26 2003-05-26 Battery pack

Publications (2)

Publication Number Publication Date
JP2004349186A JP2004349186A (en) 2004-12-09
JP4079428B2 true JP4079428B2 (en) 2008-04-23

Family

ID=33533715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003147078A Expired - Lifetime JP4079428B2 (en) 2003-05-26 2003-05-26 Battery pack

Country Status (1)

Country Link
JP (1) JP4079428B2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100954035B1 (en) 2006-05-08 2010-04-20 삼성에스디아이 주식회사 Method of charging rechargeable battery and Protection circuit for rechargeable battery
TW200937798A (en) * 2008-02-29 2009-09-01 Cheng Uei Prec Ind Co Ltd Balance circuit for battery pack
CN102412564A (en) * 2010-09-21 2012-04-11 日隆电子股份有限公司 Battery pack, protection circuit and method thereof
JP2013115911A (en) * 2011-11-28 2013-06-10 Ntt Facilities Inc Charge control system and charge control method for battery pack
JP2013115912A (en) * 2011-11-28 2013-06-10 Ntt Facilities Inc Charge control system and charge control method for battery pack
JP6132240B2 (en) * 2013-07-02 2017-05-24 パナソニックIpマネジメント株式会社 Storage battery system and control device
JP6573069B2 (en) * 2015-08-03 2019-09-11 三菱自動車工業株式会社 Charge control device
CN111211587A (en) * 2018-11-21 2020-05-29 联正电子(深圳)有限公司 Equalizing circuit, charging device and energy storage device
CN111435153B (en) * 2019-01-14 2022-08-09 河南森源重工有限公司 Battery pack voltage adjusting device and voltage adjusting control method thereof
KR20220168909A (en) * 2021-06-17 2022-12-26 주식회사 엘지에너지솔루션 Battery management apparatus and method of the same

Also Published As

Publication number Publication date
JP2004349186A (en) 2004-12-09

Similar Documents

Publication Publication Date Title
JP7144466B2 (en) Battery control unit and battery system
JP5502282B2 (en) How to charge the battery pack
JP4888041B2 (en) Battery voltage regulator
JP4065232B2 (en) How to charge the battery
JP3676134B2 (en) Charge / discharge control method
JP4400536B2 (en) Capacity adjustment device and capacity adjustment method for battery pack
US7719231B2 (en) Equilibrated charging method for a lithium-ion or lithium-polymer battery
US20140103859A1 (en) Electric storage system
US20130057218A1 (en) Device and method for controlling charge of assembled battery
JP4079428B2 (en) Battery pack
JP3669234B2 (en) Charge control device for battery pack
JP3702575B2 (en) Charge / discharge control device for battery pack
JPH0946916A (en) Charging controller
JP5098983B2 (en) Battery pack capacity adjustment device
JP2005278242A (en) Device and method for adjusting capacity of battery pack
JP3629791B2 (en) Charge control device for battery pack
JPH09308126A (en) Charger
JP3219637B2 (en) How to charge multiple lithium ion batteries
JP2005278249A (en) Capacity adjustment device and adjusting method of battery pack
JP3517844B1 (en) Secondary battery charging device and discharging device
JPH08140278A (en) Charging/discharging protector for battery pack
JPH07105981A (en) Charging method for secondary battery
JP3977215B2 (en) Charging device, charging method, and portable terminal equipped with the charging device
JP5227484B2 (en) Charging method for series-connected secondary batteries
CN111446511B (en) Battery and method for charging battery core

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20060831

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20070109

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20071114

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080104

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080130

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080204

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110215

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 4079428

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110215

Year of fee payment: 3

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110215

Year of fee payment: 3

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110215

Year of fee payment: 3

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R371 Transfer withdrawn

Free format text: JAPANESE INTERMEDIATE CODE: R371

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110215

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120215

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120215

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130215

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130215

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140215

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term