WO2022269826A1 - Charging system - Google Patents
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- WO2022269826A1 WO2022269826A1 PCT/JP2021/023850 JP2021023850W WO2022269826A1 WO 2022269826 A1 WO2022269826 A1 WO 2022269826A1 JP 2021023850 W JP2021023850 W JP 2021023850W WO 2022269826 A1 WO2022269826 A1 WO 2022269826A1
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- charging
- battery modules
- sequence
- charging system
- battery
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- 238000007600 charging Methods 0.000 title claims abstract description 100
- 230000005856 abnormality Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 14
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 12
- 229910001416 lithium ion Inorganic materials 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to charging systems.
- the present invention has been made in view of this background, and aims to provide a technology that can efficiently control charging.
- the main aspect of the present invention for solving the above-mentioned problems is a charging system comprising a charging circuit, a plurality of battery modules, and a balance circuit that balances and controls the remaining capacity imbalance between the plurality of battery modules. It alternately switches between a charging sequence in which charging control is performed selectively and individually in order from the battery module with the relatively large remaining capacity, and a balancing sequence in which the balance control is performed.
- charging can be efficiently controlled.
- FIG. 2 is a graph of charging voltage waveforms and charging current waveforms showing a method of charging a lithium ion secondary battery cell according to the present embodiment
- 1 is a circuit block diagram showing a charging system for charging three battery modules 2 connected in series according to this embodiment.
- FIG. 1 is a circuit block diagram showing a charging system that charges three battery modules 2 connected in parallel according to this embodiment.
- FIG. 1 is a circuit block diagram showing a charging system 100 according to this embodiment;
- FIG. 1 is a circuit block diagram of a charging system 100(a) showing state a, which is one state of the charging system 100 according to the present embodiment;
- FIG. 2 is a circuit block diagram of a charging system 100(b) showing a state b, which is one state of the charging system 100 according to the present embodiment
- 4 is a flow chart diagram showing an outline of control of the main controller 4 of the charging system 100 according to the present embodiment.
- the lithium ion secondary battery cell is first charged at a predetermined constant current (CC charge), and the charging voltage rises as the remaining capacity of the lithium ion secondary battery cell increases.
- the battery is charged at a constant voltage while gradually reducing the charging current so as to maintain the predetermined voltage value (CV charging).
- CV charging There is generally a charging method called CCCV charging in which the state is determined as full charge and charging is stopped.
- the CV value is proportional to the number of lithium-ion secondary battery cells or battery modules having lithium-ion secondary battery cells to be charged, and the CC value needs to be increased to shorten the charging time.
- the output voltage rating of the charging circuit related to the CV value and the output current rating of the charging circuit related to the CC value directly affect cost increase.
- three battery modules 2 each having a lithium ion secondary battery cell group 1 are connected to a charging circuit 3 via switches 6.
- all of the switches 6 are in the off state, but the main controller 4 sends an instruction signal 5 or an instruction signal 7 to turn the switches 6 on or off, or to charge the charging circuit 3 according to the flowchart shown later. Operate current output or stop.
- the switch 6 is schematically shown as a contact switch in FIG. 4, a semiconductor switch such as an FET may be used.
- a charging circuit 3 is connected to the two groups of battery modules to charge the plurality of battery modules 2 collectively.
- the charging system 100(a) charges one battery module 2 out of three battery modules 2 via a switch 6 that is turned on or off. Circuit 3 is connected. As a result, CCCV charging is performed by the charging circuit 3, and only one battery module 2 out of the three battery modules 2 is selectively and individually charged.
- the main controller 4 of the charging system 100 detects the remaining capacities of the three battery modules 2 in Step 1, and in Step 2 selects the three battery modules 2 with the relatively highest remaining capacities. Select battery module 2.
- the remaining capacity is detected by a method in which the main controller 4 directly detects the voltage appearing at the terminals of the battery module 2, or by communicating with a module controller in the battery module 2 (not shown) to detect the voltage of the lithium ion secondary battery cell group 1. Any method of acquiring value information may be used.
- the main controller 4 of the charging system 100 shifts to the charging sequence of Step 3 in which the battery module 2 with the relatively highest remaining capacity among the three battery modules 2 selected in Step 2 is charged.
- the charging sequence is performed in state a shown in FIG. 5, ie, the configuration of charging system 100(a).
- FIG. 5 shows a state in which the center one of the three battery modules 2 is selected.
- the charging circuit 3 of the charging system 100 inputs AC voltage, which is a commercial power supply, converts it to DC voltage, and performs desired CCCV charging.
- the charging circuit 3 is connected in series or in parallel. Unlike the method of collectively charging three connected battery modules 2, CC charging and CV charging for selectively and individually charging one battery module 2, that is, the output voltage rating of the charging circuit 3 and Since the output current rating is matched to one battery module 2, the cost does not increase.
- Step 4 the main controller 4 of the charging system 100 uses a communication signal (not shown) to determine whether the charging circuit 3 has detected an abnormal state during charging. 1 detects whether it is in an overvoltage state or whether it is in a high temperature state. If it is determined in Step 4 that the abnormal state is not present, the process proceeds to Step 5 to detect whether or not the charging circuit 3 has completed charging the battery module 2 . In Step 5, if the charging circuit 3 determines that the charging of the battery modules 2 has not been completed selectively and individually, the process returns to Step 3. 2 is fully charged, the output of the charging current from the charging circuit 3 is stopped, and the process proceeds to Step 6 to execute the balance sequence.
- the balancing sequence occurs in state b, the configuration of charging system 100(b), shown in FIG.
- the main controller 4 turns on all the switches 6 to connect the three battery modules 2 in parallel. At this time, current flows between the one battery module 2 that has been fully charged in Step 5 and the remaining two battery modules 2 that are not fully charged, and the voltages are balanced and balanced autonomously. That is, the remaining two battery modules 2, which were not fully charged, have their remaining capacities approaching full charge, ie, 100%, due to the balance sequence.
- the main controller 4 of the charging system 100 determines whether an abnormal state has been detected during balancing in Step 7, for example, whether the lithium ion secondary battery cell group 1 in the battery module 2 is in an overvoltage state or an overcurrent state. or whether it is in a high temperature state. If it is determined in Step 7 that the abnormal condition is not present, the process proceeds to Step 8 to determine whether the balance has been completed, that is, whether the remaining capacity difference, ie, the voltage difference, between the three battery modules 2 connected in parallel is equal to or less than a predetermined value. detect whether or not In Step 8, if it is determined that the balance has not been completed, the process returns to Step 6. If it is determined that the balance has been completed, the process proceeds to Step 10.
- Step 3 whether or not all three battery modules 2 have completed charging. detect whether or not When it is determined that charging of all the three battery modules 2 has been completed, the control of the charging system 100 ends. On the other hand, when it is determined that charging of all the three battery modules 2 has not been completed, the process returns to Step 1, The charging sequence of step 1 to step 3 for selectively and individually charging the battery modules 2 with relatively large remaining capacity and the balance sequence of step 6 are repeated until all the three battery modules 2 are fully charged.
- the time required for the balance is relatively extremely short compared to the normal charging time for CCCV charging. Therefore, even if the charging time for one battery module 2 is relatively long without increasing the output current rating of the charging circuit 3, the battery modules 2 with relatively large remaining capacity in Steps 1 to 3 are selectively and individually charged.
- the charging sequence for shortening the charging time by combining the three battery modules 2 in Step 6 with the short-time balancing sequence, the cost of the charging circuit can be reduced and the total charging time of the three battery modules 2 can be shortened. compatibility can be achieved.
- Step 4 when it is determined that the abnormal state is present, the process proceeds to Step 9 and the entire sequence, that is, the charging sequence and the balancing sequence, is interrupted.
- the charging system 100 has a configuration in which all of the switches 6 shown in FIG. Respond and ensure safety.
Abstract
[Problem] To make it possible to efficiently control charging. [Solution] A charging system (100) comprises: a charging circuit (3); a plurality of battery modules (2); and a balancing circuit that performs a control to balance the remaining capacity imbalance among the plurality of battery modules. The charging system (100) alternately switches between a charging sequence in which a charging control is selectively and individually performed in order starting with the battery module having the relatively most remaining capacity, and a balancing sequence in which said balancing control is performed. [Selected drawing] FIG. 3
Description
本発明は、充電システムに関する。
The present invention relates to charging systems.
近年、地球環境への配慮から、内燃機関すなわちエンジンで駆動するエンジン駆動式自動車がモータで駆動する電気自動車、エンジンおよびモータで駆動するハイブリッド自動車または充電器による充電が可能なプラグインハイブリッド自動車に置き換わりつつある。特に、前記電気自動車またはプラグインハイブリッド自動車の性能の向上に伴い電気自動車１台当たりの電池電源すなわち電池モジュールの搭載量が増える傾向にある。
In recent years, in consideration of the global environment, engine-driven vehicles driven by an internal combustion engine have been replaced by electric vehicles driven by a motor, hybrid vehicles driven by an engine and a motor, or plug-in hybrid vehicles that can be charged using a charger. It's getting In particular, as the performance of electric vehicles or plug-in hybrid vehicles improves, the number of battery power sources, that is, the number of battery modules mounted per electric vehicle tends to increase.
従来技術の電気自動車に搭載される電池電源とモータを備えるモータシステムでは、前記電気自動車の１充電あたりの航続距離を延長するための種々の工夫が為されているが、その航続距離は前記エンジン駆動式自動車の燃料満タン１回あたりの航続距離にはおよばない。
In a conventional motor system equipped with a battery power supply and a motor mounted on an electric vehicle, various measures have been taken to extend the cruising distance per charge of the electric vehicle. It does not reach the cruising distance per full tank of fuel of a drive-type vehicle.
本発明はこのような背景を鑑みてなされたものであり、効率的に充電を制御することができる技術を提供することを目的とする。
The present invention has been made in view of this background, and aims to provide a technology that can efficiently control charging.
上記課題を解決するための本発明の主たる発明は、充電システムであって、充電回路と、複数の電池モジュールと、前記複数の電池モジュール間の残容量アンバランスをバランス制御するバランス回路と、を備え、相対的に残容量の多い電池モジュールから順に選択的かつ個別に充電制御を行う充電シーケンスと、前記バランス制御を行うバランスシーケンスとを交互に切り換える。
The main aspect of the present invention for solving the above-mentioned problems is a charging system comprising a charging circuit, a plurality of battery modules, and a balance circuit that balances and controls the remaining capacity imbalance between the plurality of battery modules. It alternately switches between a charging sequence in which charging control is performed selectively and individually in order from the battery module with the relatively large remaining capacity, and a balancing sequence in which the balance control is performed.
その他本願が開示する課題やその解決方法については、発明の実施形態の欄及び図面により明らかにされる。
Other problems disclosed by the present application and their solutions will be clarified in the section of the embodiment of the invention and the drawings.
本発明によれば、効率的に充電を制御することができる。
According to the present invention, charging can be efficiently controlled.
図１に示すように、リチウムイオン二次電池セルの充電は、最初に、所定の定電流で充電し（ＣＣ充電）、前記リチウムイオン二次電池セルの残容量の増加に伴い充電電圧が上昇し所定電圧値に達した後に、その所定電圧値を維持するように充電電流を徐々に絞りながら定電圧で充電し（ＣＶ充電）、充電電流が所定値を下回った状態を検知した場合にその状態を満充電として判定し充電を停止するＣＣＣＶ充電と呼ばれる充電方式が一般にある。前記ＣＶ値は充電対称とするリチウムイオン二次電池セルまたはリチウムイオン二次電池セルを有する電池モジュールの直列個数に比例し、また、充電時間を短縮するためにＣＣ値の増加を必要とし、前記ＣＶ値に係る充電回路の出力電圧定格、および、前記ＣＣ値に係る充電回路の出力電流定格の高低はコストアップに直接影響する。
As shown in FIG. 1, the lithium ion secondary battery cell is first charged at a predetermined constant current (CC charge), and the charging voltage rises as the remaining capacity of the lithium ion secondary battery cell increases. After reaching a predetermined voltage value, the battery is charged at a constant voltage while gradually reducing the charging current so as to maintain the predetermined voltage value (CV charging). There is generally a charging method called CCCV charging in which the state is determined as full charge and charging is stopped. The CV value is proportional to the number of lithium-ion secondary battery cells or battery modules having lithium-ion secondary battery cells to be charged, and the CC value needs to be increased to shorten the charging time. The output voltage rating of the charging circuit related to the CV value and the output current rating of the charging circuit related to the CC value directly affect cost increase.
複数のリチウムイオン二次電池セルで成る複数個の電池モジュールが搭載される電気自動車の充電について、例えば、図２に示すように、リチウムイオン二次電池セル群１を有する３個の電池モジュール２を直列接続して電池モジュール２群を構成し、前記電池モジュール２群に充電回路３を接続して前記３個の電池モジュール２をまとめて充電する方法がある。
Regarding charging of an electric vehicle equipped with a plurality of battery modules composed of a plurality of lithium ion secondary battery cells, for example, as shown in FIG. are connected in series to form two groups of battery modules, and a charging circuit 3 is connected to the two groups of battery modules to charge the three battery modules 2 collectively.
充電システム１００は、図４に示すように、リチウムイオン二次電池セル群１を有する３個の電池モジュール２がスイッチ６を介して充電回路３と接続される。ここでは、前記スイッチ６の全てはオフ状態にあるが、後述のフローチャート図に従いメインコントローラ４が指示信号５または指示信号７を送信して前記スイッチ６のオンまたはオフ、または、充電回路３の充電電流の出力または停止を操作する。
In the charging system 100, as shown in FIG. 4, three battery modules 2 each having a lithium ion secondary battery cell group 1 are connected to a charging circuit 3 via switches 6. Here, all of the switches 6 are in the off state, but the main controller 4 sends an instruction signal 5 or an instruction signal 7 to turn the switches 6 on or off, or to charge the charging circuit 3 according to the flowchart shown later. Operate current output or stop.
なお、図４では、スイッチ６を模式的に有接点スイッチで図示したが、ＦＥＴ等の半導体スイッチを用いても良い。
Although the switch 6 is schematically shown as a contact switch in FIG. 4, a semiconductor switch such as an FET may be used.
また、リチウムイオン二次電池セルで成る複数個の電池モジュールが搭載される電気自動車の充電について、例えば、図３に示すように、リチウムイオン二次電池セル群１を有する３個の電池モジュール２を並列接続して電池モジュール２群を構成し、前記電池モジュール２群に充電回路３を接続して前記複数の電池モジュール２をまとめて充電する方法がある。
In addition, regarding charging of an electric vehicle equipped with a plurality of battery modules composed of lithium ion secondary battery cells, for example, as shown in FIG. are connected in parallel to constitute two groups of battery modules, and a charging circuit 3 is connected to the two groups of battery modules to charge the plurality of battery modules 2 collectively.
本実施形態に係る充電システム１００（ａ）は、図５に示すように、それぞれオンまたはオフに操作されたスイッチ６を介して３個の電池モジュール２の内の１個の電池モジュール２と充電回路３が接続される。これにより充電回路３によるＣＣＣＶ充電が実行されて前記３個の電池モジュール２の内の１個の電池モジュール２みが選択的個別に充電される。
The charging system 100(a) according to the present embodiment, as shown in FIG. 5, charges one battery module 2 out of three battery modules 2 via a switch 6 that is turned on or off. Circuit 3 is connected. As a result, CCCV charging is performed by the charging circuit 3, and only one battery module 2 out of the three battery modules 2 is selectively and individually charged.
本実施形態に係る充電システム１００（ｂ）は、図６に示すように、リチウムイオン二次電池セル群１を有する３個の電池モジュール２が全てオンに操作されたスイッチ６を介して並列接続されて、前記３個の電池モジュール２間の残容量アンバランスがある場合には、前記３個の電池モジュール間に電流が往来して電圧が均衡して自律的にバランスする。この際、充電回路３は充電電流を出力せず停止状態にある。
In the charging system 100(b) according to the present embodiment, as shown in FIG. 6, three battery modules 2 each having a lithium ion secondary battery cell group 1 are connected in parallel via switches 6 that are all turned on. Thus, when there is an imbalance in remaining capacity among the three battery modules 2, the current flows between the three battery modules and the voltages are balanced and balanced autonomously. At this time, the charging circuit 3 does not output charging current and is in a stopped state.
充電システム１００のメインコントローラ４の制御について、次に、図７のフローチャート図を用いて説明する。
Next, the control of the main controller 4 of the charging system 100 will be explained using the flowchart of FIG.
充電システム１００のメインコントローラ４は、Ｓｔｅｐ１にて、３個の電池モジュール２の残容量を検知し、Ｓｔｅｐ２にて、前記３個の電池モジュール２の内、相対的に１番目に残容量の多い電池モジュール２を選択する。前記残容量の検知は、メインコントローラ４が電池モジュール２の端子に表れる電圧を直接検知する方法、または、図示しない電池モジュール２内のモジュールコントローラと通信を行いリチウムイオン二次電池セル群１の電圧値情報を取得する方法、のいずれであっても良い。
The main controller 4 of the charging system 100 detects the remaining capacities of the three battery modules 2 in Step 1, and in Step 2 selects the three battery modules 2 with the relatively highest remaining capacities. Select battery module 2. The remaining capacity is detected by a method in which the main controller 4 directly detects the voltage appearing at the terminals of the battery module 2, or by communicating with a module controller in the battery module 2 (not shown) to detect the voltage of the lithium ion secondary battery cell group 1. Any method of acquiring value information may be used.
充電システム１００のメインコントローラ４は、Ｓｔｅｐ２にて選択した３個の電池モジュール２の内、相対的に１番目に残容量の多い電池モジュール２に対する充電を行うＳｔｅｐ３の充電シーケンスへ移行する。充電シーケンスは、図５に示す状態ａすなわち充電システム１００（ａ）の構成で行われる。なお、図５では、３つの電池モジュール２のうち中央のものが選択された状態を示している。前記充電シーケンスにおける充電の方法は、充電システム１００の充電回路３が商用電源である交流電圧を入力し直流電圧に変換し所望のＣＣＣＶ充電を行うが、前記充電回路３は、直列接続または並列接続続された３個の電池モジュール２をまとめて充電する方法と異なり、１個の電池モジュール２を選択的個別に充電するためのＣＣ充電およびＣＶ充電、すなわち、前記充電回路３の出力電圧定格および出力電流定格を１個の電池モジュール２に合わせるためコストアップしない、すなわち、同じ個数の電池モジュールを充電する充電システムに対して大幅にコストダウンできる。
The main controller 4 of the charging system 100 shifts to the charging sequence of Step 3 in which the battery module 2 with the relatively highest remaining capacity among the three battery modules 2 selected in Step 2 is charged. The charging sequence is performed in state a shown in FIG. 5, ie, the configuration of charging system 100(a). Note that FIG. 5 shows a state in which the center one of the three battery modules 2 is selected. In the charging method in the charging sequence, the charging circuit 3 of the charging system 100 inputs AC voltage, which is a commercial power supply, converts it to DC voltage, and performs desired CCCV charging. The charging circuit 3 is connected in series or in parallel. Unlike the method of collectively charging three connected battery modules 2, CC charging and CV charging for selectively and individually charging one battery module 2, that is, the output voltage rating of the charging circuit 3 and Since the output current rating is matched to one battery module 2, the cost does not increase.
充電システム１００のメインコントローラ４は、Ｓｔｅｐ４にて、図示しない通信信号を用いて充電回路３が充電中に異常状態を検知したか否か、例えば、電池モジュール２内のリチウムイオン二次電池セル群１が過電圧状態か否か、または、高温状態か否かを検知する。Ｓｔｅｐ４にて前記異常状態でないと判定するとＳｔｅｐ５へ移行し、前記充電回路３が前記電池モジュール２の充電を完了したか否かを検知する。Ｓｔｅｐ５にて、前記充電回路３が前記電池モジュール２を選択的個別に充電完了していないと判定するとＳｔｅｐ３に帰還する一方、前記電池モジュール２を選択的個別に充電完了した、すなわち、前記電池モジュール２が満充電になったと判定すると充電回路３の充電電流の出力を停止しＳｔｅｐ６へ移行しバランスシーケンスを実行する。バランスシーケンスは、図６に示す状態ｂすなわち充電システム１００（ｂ）の構成で行われる。メインコントローラ４は、スイッチ６の全てをオンに操作し、３個の電池モジュール２を並列接続する。この際、Ｓｔｅｐ５で満充電となった１個の前記電池モジュール２、および、満充電でない残り２個の電池モジュール２の間に電流が往来して電圧が均衡し自律的にバランスする。つまり、前記満充電でなかった前記残り２個の電池モジュール２がバランスシーケンスによりそれらの残容量が満充電すなわち１００％に近づく。
In Step 4, the main controller 4 of the charging system 100 uses a communication signal (not shown) to determine whether the charging circuit 3 has detected an abnormal state during charging. 1 detects whether it is in an overvoltage state or whether it is in a high temperature state. If it is determined in Step 4 that the abnormal state is not present, the process proceeds to Step 5 to detect whether or not the charging circuit 3 has completed charging the battery module 2 . In Step 5, if the charging circuit 3 determines that the charging of the battery modules 2 has not been completed selectively and individually, the process returns to Step 3. 2 is fully charged, the output of the charging current from the charging circuit 3 is stopped, and the process proceeds to Step 6 to execute the balance sequence. The balancing sequence occurs in state b, the configuration of charging system 100(b), shown in FIG. The main controller 4 turns on all the switches 6 to connect the three battery modules 2 in parallel. At this time, current flows between the one battery module 2 that has been fully charged in Step 5 and the remaining two battery modules 2 that are not fully charged, and the voltages are balanced and balanced autonomously. That is, the remaining two battery modules 2, which were not fully charged, have their remaining capacities approaching full charge, ie, 100%, due to the balance sequence.
充電システム１００のメインコントローラ４は、Ｓｔｅｐ７にてバランス中に異常状態を検知したか否か、例えば、電池モジュール２内のリチウムイオン二次電池セル群１が過電圧状態か否か、過電流状態か否か、または、高温状態か否かを検知する。Ｓｔｅｐ７にて前記異常状態でないと判定するとＳｔｅｐ８へ移行し、バランスが完了したか否か、すなわち、前記並列接続された３個の電池モジュール２間の残容量差すなわち電圧差が所定値以下であるか否かを検知する。Ｓｔｅｐ８にて、バランスが完了していないと判定するとＳｔｅｐ６へ帰還する一方、前記バランスが完了したと判定するとＳｔｅｐ１０へ移行し、Ｓｔｅｐ３の充電シーケンスにおいて３個の電池モジュール２の全てが充電完了したか否かを検知する。前記３個の電池モジュール２の全てが充電完了したと判定すると充電システム１００の制御が終了し、一方、前記３個の電池モジュール２が全て充電完了していないと判定すると、Ｓｔｅｐ１へ帰還し、前記３個の電池モジュール２の全てが充電完了するまでＳｔｅｐ１ないしＳｔｅｐ３の相対的に残容量の多い電池モジュール２に対して選択個別に充電する充電シーケンス、およびＳｔｅｐ６のバランスシーケンスを繰り返す。
The main controller 4 of the charging system 100 determines whether an abnormal state has been detected during balancing in Step 7, for example, whether the lithium ion secondary battery cell group 1 in the battery module 2 is in an overvoltage state or an overcurrent state. or whether it is in a high temperature state. If it is determined in Step 7 that the abnormal condition is not present, the process proceeds to Step 8 to determine whether the balance has been completed, that is, whether the remaining capacity difference, ie, the voltage difference, between the three battery modules 2 connected in parallel is equal to or less than a predetermined value. detect whether or not In Step 8, if it is determined that the balance has not been completed, the process returns to Step 6. If it is determined that the balance has been completed, the process proceeds to Step 10. In the charging sequence of Step 3, whether or not all three battery modules 2 have completed charging. detect whether or not When it is determined that charging of all the three battery modules 2 has been completed, the control of the charging system 100 ends. On the other hand, when it is determined that charging of all the three battery modules 2 has not been completed, the process returns to Step 1, The charging sequence of step 1 to step 3 for selectively and individually charging the battery modules 2 with relatively large remaining capacity and the balance sequence of step 6 are repeated until all the three battery modules 2 are fully charged.
一般に電気自動車のモータ駆動用に使用されるリチウムイオン二次電池は内部抵抗が低いため前記バランスに要する時間はＣＣＣＶ充電による通常の充電時間に対して比較的極めて短い。したがって、充電回路３の出力電流定格を上げることなく１個の電池モジュール２に対する充電時間が相応に長い場合もＳｔｅｐ１ないしＳｔｅｐ３の相対的に残容量の多い電池モジュール２に対して選択的個別に充電することで充電時間を短縮する充電シーケンス、および、Ｓｔｅｐ６の３個の電池モジュール２の短時間のバランスシーケンスを組み合わせることにより充電回路のコストダウンと３個の電池モジュール２の合計充電時間の短縮の両立を実現できる。
Because lithium-ion secondary batteries, which are generally used to drive the motors of electric vehicles, have low internal resistance, the time required for the balance is relatively extremely short compared to the normal charging time for CCCV charging. Therefore, even if the charging time for one battery module 2 is relatively long without increasing the output current rating of the charging circuit 3, the battery modules 2 with relatively large remaining capacity in Steps 1 to 3 are selectively and individually charged. By combining the charging sequence for shortening the charging time by combining the three battery modules 2 in Step 6 with the short-time balancing sequence, the cost of the charging circuit can be reduced and the total charging time of the three battery modules 2 can be shortened. compatibility can be achieved.
また一方、Ｓｔｅｐ４にて、前記異常状態であると判定するとＳｔｅｐ９へ移行し全シーケンス、すなわち、充電シーケンスおよびバランスシーケンスを中断する。この際、充電システム１００は、図２に示すスイッチ６の全てをオフに操作した充電システム１００の構成となり、充電システム内のあらゆる箇所の通電を遮断しリチウムイオン二次電池の様々な故障モードに対応し安全性を確保する。
On the other hand, in Step 4, when it is determined that the abnormal state is present, the process proceeds to Step 9 and the entire sequence, that is, the charging sequence and the balancing sequence, is interrupted. At this time, the charging system 100 has a configuration in which all of the switches 6 shown in FIG. Respond and ensure safety.
以上、本実施形態について説明したが、上記実施形態は本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。本発明は、その趣旨を逸脱することなく、変更、改良され得ると共に、本発明にはその等価物も含まれる。
Although the present embodiment has been described above, the above embodiment is intended to facilitate understanding of the present invention, and is not intended to limit and interpret the present invention. The present invention can be modified and improved without departing from its spirit, and the present invention also includes equivalents thereof.
２ 電池モジュール
４ メインコントローラ
１００ 充電システム 2battery module 4 main controller 100 charging system
４ メインコントローラ
１００ 充電システム 2
Claims (2)
- 充電回路と、
複数の電池モジュールと、
前記複数の電池モジュール間の残容量アンバランスをバランス制御するバランス回路と、
を備え、
相対的に残容量の多い電池モジュールから順に選択的かつ個別に充電制御を行う充電シーケンスと、前記バランス制御を行うバランスシーケンスとを交互に切り換える充電システム。 a charging circuit;
a plurality of battery modules;
a balance circuit that balances and controls the remaining capacity imbalance between the plurality of battery modules;
with
A charging system that alternately switches between a charging sequence in which charging control is performed selectively and individually in order from a battery module having a relatively large remaining capacity, and a balance sequence in which the balance control is performed. - 前記複数の電池モジュールの内少なくとも１個の電池モジュールの異常を検知した場合に、前記充電シーケンスおよび前記バランスシーケンスを中断する請求項１に記載の充電システム。 The charging system according to claim 1, wherein the charging sequence and the balancing sequence are interrupted when an abnormality is detected in at least one of the plurality of battery modules.
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| PCT/JP2021/023850 WO2022269826A1 (en) | 2021-06-23 | 2021-06-23 | Charging system |
| JP2023529339A JP7416510B2 (en) | 2021-06-23 | 2021-06-23 | charging system |
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| JPH04248332A (en) * | 1991-01-24 | 1992-09-03 | Sony Corp | Battery pack |
| JP2009232559A (en) * | 2008-02-29 | 2009-10-08 | Cheng Uei Precision Industry Co Ltd | Battery pack charging balancing circuit |
| JP2013013236A (en) * | 2011-06-29 | 2013-01-17 | Toyota Industries Corp | Cell balance control device and cell balance control method |
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| WO2016051635A1 (en) * | 2014-09-29 | 2016-04-07 | ソニー株式会社 | Electric power storage device, electronic device, electric vehicle, and electric power system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4248332B2 (en) | 2003-07-04 | 2009-04-02 | ローランド株式会社 | Mobile communication body, performance information transfer system, and performance information transfer program |
| JPWO2012086825A1 (en) | 2010-12-21 | 2014-06-05 | 日本電気株式会社 | Charging apparatus and charging method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04248332A (en) * | 1991-01-24 | 1992-09-03 | Sony Corp | Battery pack |
| JP2009232559A (en) * | 2008-02-29 | 2009-10-08 | Cheng Uei Precision Industry Co Ltd | Battery pack charging balancing circuit |
| JP2013013236A (en) * | 2011-06-29 | 2013-01-17 | Toyota Industries Corp | Cell balance control device and cell balance control method |
| JP2014033604A (en) * | 2012-07-13 | 2014-02-20 | Sanyo Electric Co Ltd | Charge/discharge state equalization method for battery system, charge/discharge state change method for battery system, and battery system |
| WO2016051635A1 (en) * | 2014-09-29 | 2016-04-07 | ソニー株式会社 | Electric power storage device, electronic device, electric vehicle, and electric power system |
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