WO2022269827A1 - Charging system - Google Patents
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- WO2022269827A1 WO2022269827A1 PCT/JP2021/023851 JP2021023851W WO2022269827A1 WO 2022269827 A1 WO2022269827 A1 WO 2022269827A1 JP 2021023851 W JP2021023851 W JP 2021023851W WO 2022269827 A1 WO2022269827 A1 WO 2022269827A1
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- 238000007600 charging Methods 0.000 title claims abstract description 90
- 230000005856 abnormality Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 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
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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, at least three battery modules, and a balance circuit for controlling the remaining capacity imbalance between the battery modules. It alternately switches between a charging sequence in which charging control is performed selectively and individually in order from the battery modules having the relatively first and second highest remaining capacities, and a balancing sequence in which the balance control is performed.
- charging can be efficiently controlled.
- FIG. 2 is a circuit block diagram showing state a, which is one state of the charging system 100 according to the present embodiment.
- 1 is a circuit block diagram of a charging system 101(a) showing state a, which is one state of the charging system 101 according to the present embodiment;
- FIG. 4 is a circuit block diagram of charging system 101(b) showing another state b, which is another state of charging system 101 according to the present embodiment. 4 is a flow chart diagram showing an outline of control of the main controller 40 of the charging system 101 according to the present embodiment.
- one specific battery module 2 out of three battery modules 2 having a lithium ion secondary battery cell group 1 is turned on or off. It is connected to the charging circuit 3 via the switch 6 . As a result, an energization path through which a charging current flows from the charging circuit 3 to the specific one battery module 2 is formed, and the battery module 2 relatively having the highest remaining capacity is selectively and individually charged.
- two specific battery modules 2 out of three battery modules 2 each having a lithium ion secondary battery cell group 1 are turned on or off. It is connected to charging circuit 3A and charging circuit 3B via switch 6, respectively.
- two independent conduction paths are formed through which charging currents flow individually from the charging circuit 3A and the charging circuit 3B to the specific two battery modules 2 according to the flow chart of FIG. 4, which will be described later.
- the two battery modules 2 are charged simultaneously.
- a common circuit board can be used for the charging circuit 3A and the charging circuit 3B, and the charging system 101 can reduce the total cost even if the number of charging circuit boards increases compared to the charging circuit 3 of the charging system 100.
- the main controller 40 of the charging system 101 detects the remaining capacities of the three battery modules 2 in Step 1, and detects the remaining capacities of the three battery modules 2 relative to the first and second among the three battery modules 2 in Step 2.
- a battery module 2 with a large capacity is selected.
- the remaining capacity is detected by a method in which the main controller 40 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 group of lithium ion secondary battery cells. method of acquiring one voltage value information.
- the main controller 40 of the charging system 101 charges the two battery modules 2 with the first and second highest remaining capacities among the three battery modules 2 selected in Step 2 by the charging circuit 3A and the main controller 40.
- the charging sequence proceeds to Step 3 in which two batteries are independently charged simultaneously using the charging circuit 3B.
- the charging method in the charging sequence is that the charging circuits 3A and 3B respectively input an AC voltage, which is a commercial power supply, convert it to a DC voltage, and independently perform desired CCCV charging.
- Step 4 the main controller 40 of the charging system 101 uses a communication signal (not shown) to determine whether or not either the charging circuit 3A or the charging circuit 3B has detected an abnormal state during charging. It detects whether the lithium ion secondary battery cell group 1 in the module 2 is in an overvoltage state or a high temperature state. When it is determined in Step 4 that the abnormal state is not present, the process proceeds to Step 5, and either one of the charging circuit 3A or the charging circuit 3B has completed charging of at least one battery module 2 out of the two battery modules 2. detect whether or not In Step 5, if it is determined that the charging circuit 3A or the charging circuit 3B has not completed charging the at least one battery module 2, the process returns to Step 3, while charging the at least one battery module 2 has been completed.
- Step 6 executes the balance sequence.
- the balancing sequence occurs in state b, the configuration of charging system 101(b), shown in FIG.
- the main controller 40 turns on all the switches 6 to connect the three battery modules 2 in parallel.
- the balance between the one battery module 2 fully charged in Step 5 another battery module 2 in the middle of charging in Step 3, and the remaining one battery module 2 that has not been charged. Eliminates capacity imbalance. That is, the remaining capacity of the two battery modules 2 which were not fully charged approaches 100% due to the balance sequence.
- the main controller 40 of the charging system 101 determines whether or not an abnormal state has been detected during balancing in Step 7. For example, the lithium ion secondary battery cell group in at least one of the three battery modules 2 is checked. 1 detects whether it is in an overvoltage state, an overcurrent state, or 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, Until all of the three battery modules 2 are fully charged, the two battery modules 2 with the relatively first and second highest remaining capacities in Steps 1 to 3 are selectively and individually charged at the same time. sequence, and the balance sequence of Step 6 are repeated.
- Lithium ion secondary batteries which are generally used to drive motors of electric vehicles, have low internal resistance, so the voltage balance due to current flow between the lithium ion secondary batteries is fast, and the time required for the balance is the charging time of normal CCCV charging. can be used to be relatively very short for . Therefore, even if the output current ratings of charging circuit 3A and charging circuit 3B are lower than that of charging circuit 3 of charging system 100 and the charging time for one battery module 2 is correspondingly longer, the first and second current ratings are relatively high. By combining the charging sequence for selectively and individually charging two battery modules 2 with a large remaining capacity at the same time and the short-time balance sequence, the cost of the charging system can be reduced and the total charging time of the three battery modules 2 can be shortened. Both shortening can be achieved.
- Step 4 if it is determined that the abnormal state is present, the process proceeds to Step 9 and interrupts the entire sequence, that is, the charging sequence and the balancing sequence. At this time, the charging system 101 turns off all of the switches 6, cuts off the energization of all parts in the charging system, and ensures safety by dealing with various failure modes of the lithium ion secondary battery.
Abstract
[Problem] To make it possible to efficiently control charging. [Solution] This charging system comprises: a charging circuit; at least three battery modules; and a balancing circuit that performs a control to balance the remaining capacity imbalance among the battery modules. The charging system alternately switches between a charging sequence in which a charging control is selectively and individually performed in order starting with the battery modules having the relatively most and second most remaining capacities, and a balancing sequence in which said balancing control is performed.
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、少なくとも３個の電池モジュールと、前記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１番目および２番目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, at least three battery modules, and a balance circuit for controlling the remaining capacity imbalance between the battery modules. It alternately switches between a charging sequence in which charging control is performed selectively and individually in order from the battery modules having the relatively first and second highest remaining capacities, 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.
充電システム１００（ａ）は、図１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の内、特定の１個の電池モジュール２がそれぞれオンまたはオフに操作されたスイッチ６を介して充電回路３と接続される。これにより前記充電回路３から前記特定の１個の電池モジュール２へ充電電流が流れる通電経路が形成され、相対的に１番目に残容量の多い電池モジュール２から選択的個別に充電が行われる。
In the charging system 100(a), as shown in FIG. 1, one specific battery module 2 out of three battery modules 2 having a lithium ion secondary battery cell group 1 is turned on or off. It is connected to the charging circuit 3 via the switch 6 . As a result, an energization path through which a charging current flows from the charging circuit 3 to the specific one battery module 2 is formed, and the battery module 2 relatively having the highest remaining capacity is selectively and individually charged.
充電システム１０１（ａ）は、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の内、特定の２個の電池モジュール２がそれぞれオンまたはオフに操作されたスイッチ６を介して充電回路３Ａおよび充電回路３Ｂとそれぞれ接続される。これにより、後述の図４のフローチャート図に従い前記充電回路３Ａおよび充電回路３Ｂから前記特定の２個の電池モジュール２へ個別に充電電流が流れる独立した２個の通電経路が形成され、前記特定の２個の電池モジュール２に対する充電が同時に行われる。前記充電回路３Ａおよび充電回路３Ｂは共通の回路基板を用いることができ、前記充電システム１０１は、充電システム１００の充電回路３よりも充電回路基板の個数が増えても前記共通化によりトータルコストダウンを実現する。
In the charging system 101(a), as shown in FIG. 2, two specific battery modules 2 out of three battery modules 2 each having a lithium ion secondary battery cell group 1 are turned on or off. It is connected to charging circuit 3A and charging circuit 3B via switch 6, respectively. As a result, two independent conduction paths are formed through which charging currents flow individually from the charging circuit 3A and the charging circuit 3B to the specific two battery modules 2 according to the flow chart of FIG. 4, which will be described later. The two battery modules 2 are charged simultaneously. A common circuit board can be used for the charging circuit 3A and the charging circuit 3B, and the charging system 101 can reduce the total cost even if the number of charging circuit boards increases compared to the charging circuit 3 of the charging system 100. Realize
充電システム１０１（ｂ）は、図３に示すように、スイッチ６の全てがオンに操作され、３個の電池モジュール２を並列接続する。仮に、前記３個の電池モジュール２間の残容量がアンバランスであった場合、前記並列接続によって前記３個の電池モジュール２間に電流が往来して電圧が均衡し自律的に前記３個の電池モジュール２の残容量がバランスする。
In the charging system 101(b), as shown in FIG. 3, all the switches 6 are turned on to connect the three battery modules 2 in parallel. If the remaining capacities of the three battery modules 2 are unbalanced, the parallel connection allows the current to flow between the three battery modules 2 to balance the voltages, thereby autonomously balancing the three battery modules. The remaining capacities of the battery modules 2 are balanced.
充電システム１０１のメインコントローラ４０の制御について、次に、図４のフローチャート図を用いて説明する。
Next, the control of the main controller 40 of the charging system 101 will be explained using the flowchart of FIG.
充電システム１０１のメインコントローラ４０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番目および２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、前記メインコントローラ４０が前記電池モジュール２の端子に現れる電圧を直接検知する方法、または、図示しない前記電池モジュール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 40 of the charging system 101 detects the remaining capacities of the three battery modules 2 in Step 1, and detects the remaining capacities of the three battery modules 2 relative to the first and second among the three battery modules 2 in Step 2. A battery module 2 with a large capacity is selected. The remaining capacity is detected by a method in which the main controller 40 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 group of lithium ion secondary battery cells. method of acquiring one voltage value information.
充電システム１０１のメインコントローラ４０は、Ｓｔｅｐ２にて選択した前記３個の電池モジュール２の内、対的に１番目および２番目に残容量の多い２個の電池モジュール２に対する充電を充電回路３Ａおよび充電回路３Ｂを用いて独立に２個同時に充電を行うＳｔｅｐ３の充電シーケンスへ移行する。前記充電シーケンスにおける充電の方法は、前記充電回路３Ａおよび充電回路３Ｂが商用電源である交流電圧をそれぞれ入力し直流電圧に変換し独立にそれぞれ所望のＣＣＣＶ充電を行う。
The main controller 40 of the charging system 101 charges the two battery modules 2 with the first and second highest remaining capacities among the three battery modules 2 selected in Step 2 by the charging circuit 3A and the main controller 40. The charging sequence proceeds to Step 3 in which two batteries are independently charged simultaneously using the charging circuit 3B. The charging method in the charging sequence is that the charging circuits 3A and 3B respectively input an AC voltage, which is a commercial power supply, convert it to a DC voltage, and independently perform desired CCCV charging.
充電システム１０１のメインコントローラ４０は、Ｓｔｅｐ４にて、図示しない通信信号を用いて充電回路３Ａまたは充電回路３Ｂのいずれかが充電中に異常状態を検知したか否か、例えば、前記２個の電池モジュール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３Ａまたは充電回路３Ｂのいずれか１個が前記２個の電池モジュール２内の少なくとも１個の電池モジュール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３Ａまたは充電回路３Ｂが前記少なくとも１個の電池モジュール２を充電完了していないと判定するとＳｔｅｐ３に帰還する一方、前記少なくとも１個の電池モジュール２を充電完了した、すなわち、前記少なくとも１個の電池モジュール２が満充電になったと判定すると充電回路３Ａおよび充電回路３Ｂ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３に示す状態ｂすなわち充電システム１０１（ｂ）の構成で行われる。メインコントローラ４０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、Ｓｔｅｐ３にて充電途中の別の１個の電池モジュール２、および、充電されていない残り１個の電池モジュール２の間の残容量アンバランスが解消する。すなわち、満充電でなかった前記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 40 of the charging system 101 uses a communication signal (not shown) to determine whether or not either the charging circuit 3A or the charging circuit 3B has detected an abnormal state during charging. It detects whether the lithium ion secondary battery cell group 1 in the module 2 is in an overvoltage state or a high temperature state. When it is determined in Step 4 that the abnormal state is not present, the process proceeds to Step 5, and either one of the charging circuit 3A or the charging circuit 3B has completed charging of at least one battery module 2 out of the two battery modules 2. detect whether or not In Step 5, if it is determined that the charging circuit 3A or the charging circuit 3B has not completed charging the at least one battery module 2, the process returns to Step 3, while charging the at least one battery module 2 has been completed. , when it is determined that the at least one battery module 2 is fully charged, the charging circuit 3A and the charging circuit 3B stop outputting the charging current, and the process proceeds to Step 6 to execute the balance sequence. The balancing sequence occurs in state b, the configuration of charging system 101(b), shown in FIG. The main controller 40 turns on all the switches 6 to connect the three battery modules 2 in parallel. At this time, the balance between the one battery module 2 fully charged in Step 5, another battery module 2 in the middle of charging in Step 3, and the remaining one battery module 2 that has not been charged. Eliminates capacity imbalance. That is, the remaining capacity of the two battery modules 2 which were not fully charged approaches 100% due to the balance sequence.
充電システム１０１のメインコントローラ４０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、３個の電池モジュール２の内少なくとも１個の電池モジュール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１番目および２番目に残容量の多い２個の電池モジュール２に対して選択個別に２個同時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 40 of the charging system 101 determines whether or not an abnormal state has been detected during balancing in Step 7. For example, the lithium ion secondary battery cell group in at least one of the three battery modules 2 is checked. 1 detects whether it is in an overvoltage state, an overcurrent state, or 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, Until all of the three battery modules 2 are fully charged, the two battery modules 2 with the relatively first and second highest remaining capacities in Steps 1 to 3 are selectively and individually charged at the same time. sequence, and the balance sequence of Step 6 are repeated.
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リチウムイオン二次電池間の電流往来による電圧均衡が速く前記バランスに要する時間は通常のＣＣＣＶ充電による充電時間に対して比較的極めて短いことを利用できる。したがって、充電回路３Ａおよび充電回路３Ｂの出力電流定格を充電システム１００の充電回路３よりも下げて１個の電池モジュール２に対する充電時間が相応に長くなる場合においても相対的に１番目および２番目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２個同時に充電する充電シーケンスと前記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システムのコストダウンと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。
Lithium ion secondary batteries, which are generally used to drive motors of electric vehicles, have low internal resistance, so the voltage balance due to current flow between the lithium ion secondary batteries is fast, and the time required for the balance is the charging time of normal CCCV charging. can be used to be relatively very short for . Therefore, even if the output current ratings of charging circuit 3A and charging circuit 3B are lower than that of charging circuit 3 of charging system 100 and the charging time for one battery module 2 is correspondingly longer, the first and second current ratings are relatively high. By combining the charging sequence for selectively and individually charging two battery modules 2 with a large remaining capacity at the same time and the short-time balance sequence, the cost of the charging system can be reduced and the total charging time of the three battery modules 2 can be shortened. Both shortening 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１０１は、スイッチ６の全てをオフに操作した状態となり、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, if it is determined that the abnormal state is present, the process proceeds to Step 9 and interrupts the entire sequence, that is, the charging sequence and the balancing sequence. At this time, the charging system 101 turns off all of the switches 6, cuts off the energization of all parts in the charging system, and ensures safety by dealing with various failure modes of the lithium ion secondary battery.
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
４０ メインコントローラ
１０１ 充電システム 2battery module 40 main controller 101 charging system
４０ メインコントローラ
１０１ 充電システム 2
Claims (2)
- 充電回路と、
少なくとも３個の電池モジュールと、
前記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１番目および２番目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を交互に切り換える充電システム。 a charging circuit;
at least three battery modules;
a balance circuit that balances and controls the remaining capacity imbalance between the 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 battery modules with the relatively first and second highest remaining capacities, and a balancing sequence in which the balance control is performed. - 前記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 battery modules.
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| PCT/JP2021/023851 WO2022269827A1 (en) | 2021-06-23 | 2021-06-23 | Charging system |
| JP2023529340A JP7416511B2 (en) | 2021-06-23 | 2021-06-23 | charging system |
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| PCT/JP2021/023851 WO2022269827A1 (en) | 2021-06-23 | 2021-06-23 | Charging system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012086825A1 (en) * | 2010-12-21 | 2012-06-28 | 日本電気株式会社 | Charging device and charging method |
| JP2015015777A (en) * | 2013-07-03 | 2015-01-22 | ソニー株式会社 | Power storage device and control method power storage device |
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|---|---|---|---|---|
| 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 |
| TW200937798A (en) | 2008-02-29 | 2009-09-01 | Cheng Uei Prec Ind Co Ltd | Balance circuit for battery pack |
| JP6428107B2 (en) | 2014-09-29 | 2018-11-28 | 株式会社村田製作所 | Power storage device, electronic device, electric vehicle and power system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012086825A1 (en) * | 2010-12-21 | 2012-06-28 | 日本電気株式会社 | Charging device and charging method |
| JP2015015777A (en) * | 2013-07-03 | 2015-01-22 | ソニー株式会社 | Power storage device and control method power storage device |
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