JP2019165583A - Battery charger for vehicle - Google Patents

Battery charger for vehicle Download PDF

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JP2019165583A
JP2019165583A JP2018053073A JP2018053073A JP2019165583A JP 2019165583 A JP2019165583 A JP 2019165583A JP 2018053073 A JP2018053073 A JP 2018053073A JP 2018053073 A JP2018053073 A JP 2018053073A JP 2019165583 A JP2019165583 A JP 2019165583A
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battery cell
connection switch
battery
series
series connection
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真吾 槌矢
Shingo Tsuchiya
真吾 槌矢
鎌田　誠二
Seiji Kamata
誠二 鎌田
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Keihin Corp
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Keihin Corp
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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
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

To detect deposition of a switch for switching electric connection of a battery cell.SOLUTION: A battery charger for a vehicle is provided with: a plurality of battery cell groups in which battery cells are connected in series; a total voltage detection part which detects a total voltage of the plurality of battery cell groups; a parallel connection switch which connects the plurality of battery cell groups in parallel; a series connection switch which connects the lowest-order cell of one battery cell group of the plurality of battery cell groups with the highest-order cell of the other battery cell group; a changeover control part which controls the parallel connection switch and the series connection switch to on or off for switching the plurality of battery cell groups in parallel or in series; and a deposition determination part which determines deposition of the series connection switch based on the total voltage during a period of controlling the series connection switch to an off state by the switching control part.SELECTED DRAWING: Figure 1

Description

本発明は、車両用バッテリ充電装置に関する。   The present invention relates to a vehicle battery charger.

下記特許文献１には、電気自動車に搭載される車両用バッテリ充電装置が開示されている。上記車両用バッテリ充電装置は、複数の電池セルを電気的に接続した組電池、当該各電池セルの電気的接続を切り替える複数のスイッチ、及び当該スイッチの各々を制御して各電池セルの電気的接続を並列接続又は直列接続に制御するバッテリ制御装置を有して構成される。そして、バッテリ制御装置は、組電池を充電する場合には、スイッチを切り替え、各電池セルの電気的接続を直流接続に制御する。   Patent Document 1 below discloses a vehicle battery charging device mounted on an electric vehicle. The vehicle battery charging device includes an assembled battery in which a plurality of battery cells are electrically connected, a plurality of switches for switching the electrical connection of the battery cells, and an electrical control for each battery cell by controlling each of the switches. The battery control device is configured to control connection in parallel connection or series connection. Then, when charging the battery pack, the battery control device switches a switch to control the electrical connection of each battery cell to a direct current connection.

特開２００８−２７８６３５号公報JP 2008-278635 A

ところで、組電池の充電時間を短縮する方法として、組電池への充電電流を大きくする方法が考えられる。しかしながら、組電池への充電電流を大きくするとスイッチが溶着するおそれがあり、当該溶着（スイッチが導通状態で固着）を検出することが望まれている。   By the way, as a method of shortening the charging time of the assembled battery, a method of increasing the charging current to the assembled battery is conceivable. However, when the charging current to the assembled battery is increased, the switch may be welded, and it is desired to detect the welding (the switch is fixed in a conductive state).

本発明は、このような事情に鑑みてなされたもので、その目的は、電池セルの電気的接続を切り替えるスイッチの溶着を検出することである。   This invention is made | formed in view of such a situation, The objective is to detect the welding of the switch which switches the electrical connection of a battery cell.

本発明の一態様は、電池セルを直列に接続した複数の電池セル群と、前記複数の電池セル群の総電圧を検出する総電圧検出部と、前記複数の電池セル群を並列に接続する並列接続スイッチと、前記複数の電池セル群の一方の電池セル群の最下位セルと他方の電池セル群の最上位セルとを接続する直列接続スイッチと、前記複数の電池セル群を並列または直列に切り替えるために、前記並列接続スイッチ及び前記直列接続スイッチをオフまたはオンに制御する切替制御部と、前記切替制御部によって前記直列接続スイッチをオフ状態に制御している期間中に、前記総電圧に基づいて前記直列接続スイッチの溶着を判定する溶着判定部と、を備えることを特徴とする車両用バッテリ充電装置である。   In one aspect of the present invention, a plurality of battery cell groups in which battery cells are connected in series, a total voltage detection unit that detects a total voltage of the plurality of battery cell groups, and the plurality of battery cell groups are connected in parallel. A parallel connection switch; a series connection switch for connecting a lowest cell of one battery cell group of the plurality of battery cell groups and a highest cell of the other battery cell group; and the plurality of battery cell groups in parallel or in series. A switching control unit that controls the parallel connection switch and the series connection switch to be turned off or on, and the total voltage during the period when the series connection switch is controlled to be turned off by the switching control unit. And a welding determination unit that determines the welding of the series connection switch based on the above.

以上説明したように、本発明によれば、電池セルの電気的接続を切り替えるスイッチの溶着を検出することができる。   As described above, according to the present invention, it is possible to detect welding of a switch that switches electrical connection of battery cells.

本発明の一実施形態に係る車両用バッテリ充電装置１を備えた充電システムＡの概略構成の一例を示す図である。It is a figure which shows an example of schematic structure of the charging system A provided with the vehicle battery charging device 1 which concerns on one Embodiment of this invention.

以下、本発明の一実施形態に係る車両用バッテリ充電装置を、図面を用いて説明する。   Hereinafter, a vehicle battery charger according to an embodiment of the present invention will be described with reference to the drawings.

図１（ａ）は、本発明の一実施形態に係る車両用バッテリ充電装置１を備えた充電システムＡの概略構成の一例を示す図である。図１（ａ）に示すように、充電システムＡは、車両用バッテリ充電装置１及び外部充電器２を備える。   Fig.1 (a) is a figure which shows an example of schematic structure of the charging system A provided with the battery charger 1 for vehicles which concerns on one Embodiment of this invention. As shown in FIG. 1A, the charging system A includes a vehicle battery charger 1 and an external charger 2.

外部充電器２は、車両用バッテリ充電装置１内の組電池（バッテリ）を車両外部から充電（外部充電）する装置や設備であり、例えば、商業施設、駐車場などに設置される充電スタンドや、可搬可能な電源である。   The external charger 2 is a device or facility for charging (external charging) an assembled battery (battery) in the vehicle battery charging device 1 from the outside of the vehicle. For example, a charging stand installed in a commercial facility, a parking lot, etc. It is a portable power source.

車両用バッテリ充電装置１は、ハイブリッド車や電気自動者等の車両に搭載される。   The vehicle battery charging device 1 is mounted on a vehicle such as a hybrid vehicle or an electric motor vehicle.

車両用バッテリ充電装置１は、複数の電池セル群１０（１０−１〜１０−３）、第１のコンタクタ１１、プリチャージ回路１１ａ、第２のコンタクタ１２、インバータ１３、複数の並列接続スイッチ１４（１４−１〜１４−６）、複数の直列接続スイッチ１５（１５−１、１５−２）、充電プラグ１６、ＡＣ／ＤＣ変換器１７、及び充電制御部１８を備える。この複数の電池セル群１０は、車両の組電池として構成される。   The vehicle battery charging device 1 includes a plurality of battery cell groups 10 (10-1 to 10-3), a first contactor 11, a precharge circuit 11a, a second contactor 12, an inverter 13, and a plurality of parallel connection switches 14. (14-1 to 14-6), a plurality of serial connection switches 15 (15-1, 15-2), a charging plug 16, an AC / DC converter 17, and a charging control unit 18. The plurality of battery cell groups 10 are configured as an assembled battery of a vehicle.

各電池セル群１０には、ｎ個の電池セルｂ１〜ｂｎが直列接続されている。各電池セル群１０において、最上位に位置する電池セルｂ１（最上位セル）のプラス端子が電池セル群１０のプラス端子（一方の出力端子）であり、また最下位に位置する電池セルｂｎ（最下位セル）のマイナス端子が電池セル群１０のマイナス端子（他方の出力端子）である。なお、上記「ｎ」は２以上の自然数である。なお、本実施形態では、車両用バッテリ充電装置１は、３つの電池セル群１０を備える場合について説明するが、本発明はこれに限定されず、複数であればその数には特に限定されない。   In each battery cell group 10, n battery cells b1 to bn are connected in series. In each battery cell group 10, the plus terminal of the battery cell b1 (the highest cell) positioned at the top is the plus terminal (one output terminal) of the battery cell group 10, and the battery cell bn ( The minus terminal of the lowest cell is the minus terminal (the other output terminal) of the battery cell group 10. The “n” is a natural number of 2 or more. In addition, although this embodiment demonstrates the case where the vehicle battery charging device 1 is provided with the three battery cell groups 10, this invention is not limited to this, If it is plurality, it will not specifically limit to the number.

第１のコンタクタ１１は、充電制御部１８からの制御に応じて開状態あるいは閉状態に変化する一対の接点を備えた通電開閉器である。第１のコンタクタ１１は、一方の接点が上記組電池のプラス端子に接続されており、他方の接点がインバータ１３の第１入力端に接続されている。
プリチャージ回路１１ａは、第１のコンタクタ１１に対して並列に接続される。 The first contactor 11 is an energizing switch that includes a pair of contacts that change to an open state or a closed state in accordance with control from the charging control unit 18. One contact of the first contactor 11 is connected to the plus terminal of the assembled battery, and the other contact is connected to the first input terminal of the inverter 13.
The precharge circuit 11 a is connected in parallel to the first contactor 11.

第２のコンタクタ１２は、第１のコンタクタ１１と同様に充電制御部１８からの制御に応じて開状態あるいは閉状態に変化する一対の接点を備えた通電開閉器である。第２のコンタクタ１２は、一方の接点が上記組電池のマイナス端子に接続されており、他方の接点がインバータ１３の第２入力端に接続されている。   Similar to the first contactor 11, the second contactor 12 is an energizing switch provided with a pair of contacts that change to an open state or a closed state in accordance with control from the charging control unit 18. The second contactor 12 has one contact point connected to the negative terminal of the assembled battery and the other contact point connected to the second input terminal of the inverter 13.

インバータ１３は、第１入力端及び第２入力端に入力された組電池の直流電力を交流電力に変換して、車両内の負荷（例えば、走行モータ）に出力する。   The inverter 13 converts the DC power of the assembled battery input to the first input terminal and the second input terminal into AC power and outputs the AC power to a load (for example, a traveling motor) in the vehicle.

並列接続スイッチ１４は、第１のコンタクタ１１の一方の接点と第２のコンタクタ１２の一方の接点との間に接続され、複数の電池セル群１０を並列に接続可能なスイッチである。   The parallel connection switch 14 is connected between one contact point of the first contactor 11 and one contact point of the second contactor 12, and is a switch that can connect a plurality of battery cell groups 10 in parallel.

具体的には、並列接続スイッチ１４−１は、一端が第１のコンタクタ１１の一方の接点に接続され、他端が電池セル群１０−１のプラス端子に接続されている。並列接続スイッチ１４−２は、一端が第１のコンタクタ１１の一方の接点に接続され、他端が電池セル群１０−２のプラス端子に接続されている。並列接続スイッチ１４−３は、一端が第１のコンタクタ１１の一方の接点に接続され、他端が電池セル群１０−３のプラス端子に接続されている。   Specifically, one end of the parallel connection switch 14-1 is connected to one contact of the first contactor 11, and the other end is connected to the plus terminal of the battery cell group 10-1. One end of the parallel connection switch 14-2 is connected to one contact of the first contactor 11, and the other end is connected to the plus terminal of the battery cell group 10-2. One end of the parallel connection switch 14-3 is connected to one contact of the first contactor 11, and the other end is connected to the plus terminal of the battery cell group 10-3.

並列接続スイッチ１４−４は、一端が電池セル群１０−１のマイナス端子に接続され、他端が第２のコンタクタ１２の一方の接点に接続されている。並列接続スイッチ１４−５は、一端が電池セル群１０−２のマイナス端子に接続され、他端が第２のコンタクタ１２の一方の接点に接続されている。並列接続スイッチ１４−６は、一端が電池セル群１０−３のマイナス端子に接続され、他端が第２のコンタクタ１２の一方の接点に接続されている。   One end of the parallel connection switch 14-4 is connected to the minus terminal of the battery cell group 10-1, and the other end is connected to one contact of the second contactor 12. One end of the parallel connection switch 14-5 is connected to the negative terminal of the battery cell group 10-2, and the other end is connected to one contact of the second contactor 12. One end of the parallel connection switch 14-6 is connected to the negative terminal of the battery cell group 10-3, and the other end is connected to one contact of the second contactor 12.

直列接続スイッチ１５は、第１のコンタクタ１１の一方の接点と第２のコンタクタ１２の一方の接点との間に接続され、複数の電池セル群１０を直列に接続可能なスイッチである。   The series connection switch 15 is a switch that is connected between one contact of the first contactor 11 and one contact of the second contactor 12 and is capable of connecting a plurality of battery cell groups 10 in series.

具体的には、直列接続スイッチ１５−１は、一端が電池セル群１０−１のマイナス端子に接続され、他端が電池セル群１０−２のプラス端子に接続されている。直列接続スイッチ１５−２は、一端が電池セル群１０−２のマイナス端子に接続され、他端が電池セル群１０−３のプラス端子に接続されている。   Specifically, one end of series connection switch 15-1 is connected to the minus terminal of battery cell group 10-1, and the other end is connected to the plus terminal of battery cell group 10-2. One end of series connection switch 15-2 is connected to the minus terminal of battery cell group 10-2, and the other end is connected to the plus terminal of battery cell group 10-3.

充電プラグ１６は、車両用バッテリ充電装置１を外部充電器２に接続するための接続手段である。具体的には、充電プラグ１６は、外部充電器２の充電コネクタ（不図示）と結合することにより外部充電器２と車両用バッテリ充電装置１とを接続することができる。   The charging plug 16 is a connection means for connecting the vehicle battery charging device 1 to the external charger 2. Specifically, the charging plug 16 can be connected to a charging connector (not shown) of the external charger 2 to connect the external charger 2 and the vehicle battery charging device 1.

ＡＣ／ＤＣ変換器１７は、充電プラグ１６を介して外部充電器２から供給された交流電力を直流電力に変換し、並列接続スイッチ１４−１〜１４−３の一端に供給される。   The AC / DC converter 17 converts AC power supplied from the external charger 2 through the charging plug 16 into DC power, and is supplied to one end of the parallel connection switches 14-1 to 14-3.

充電制御部１８は、総電圧検出部１８１、切替制御部１８２、及び溶着判定部１８３を備える。
総電圧検出部１８１は、複数の電池セル群１０の総電圧Ｖを検出する。具体的には、総電圧検出部１８１は、組電池のプラス端子とマイナス端子との間の電圧を検出することで、総電圧Ｖを検出する。 The charging control unit 18 includes a total voltage detection unit 181, a switching control unit 182, and a welding determination unit 183.
The total voltage detection unit 181 detects the total voltage V of the plurality of battery cell groups 10. Specifically, the total voltage detector 181 detects the total voltage V by detecting the voltage between the plus terminal and the minus terminal of the assembled battery.

切替制御部１８２は、並列接続スイッチ１４−１〜１４−６及び直列接続スイッチ１５−１，１５−２のそれぞれをオン状態又はオフ状態に制御することで、複数の電池セル群１０−１〜１０−３を並列又は直列に接続する。   The switching control unit 182 controls each of the parallel connection switches 14-1 to 14-6 and the series connection switches 15-1 and 15-2 to be in an on state or an off state, so that a plurality of battery cell groups 10-1 to 10-1 10-3 are connected in parallel or in series.

具体的には、切替制御部１８２は、並列接続スイッチ１４−１，１４−６及び直列接続スイッチ１５−１，１５−２をオン状態に制御し、並列接続スイッチ１４−２〜１４−５をオフ状態に制御することで、複数の電池セル群１０−１〜１０−３を直列に接続することができる。   Specifically, the switching control unit 182 controls the parallel connection switches 14-1 and 14-6 and the series connection switches 15-1 and 15-2 to be in an on state, and switches the parallel connection switches 14-2 to 14-5. By controlling to the off state, a plurality of battery cell groups 10-1 to 10-3 can be connected in series.

切替制御部１８２は、並列接続スイッチ１４−１〜１４−６をオン状態に制御し、直列接続スイッチ１５−１，１５−２をオフ状態に制御することで、複数の電池セル群１０−１〜１０−３を並列に接続することができる。   The switching control unit 182 controls the parallel connection switches 14-1 to 14-6 to an on state and controls the series connection switches 15-1 and 15-2 to an off state, whereby a plurality of battery cell groups 10-1 are provided. -10-3 can be connected in parallel.

溶着判定部１８３は、外部充電後において、直列接続スイッチ１５−１，１５−２をオフ状態に制御している期間中に、総電圧Ｖに基づいて直列接続スイッチ１５−１，１５−２の溶着（スイッチが導通状態で固着）を判定する。   The welding determination unit 183 controls the series connection switches 15-1 and 15-2 based on the total voltage V during the period in which the series connection switches 15-1 and 15-2 are controlled to be turned off after external charging. Welding (fixed when the switch is conductive) is determined.

以下に、本発明の一実施形態に係る直列接続スイッチ１５−１，１５−２の溶着の判定方法を、図１（ｂ）を用いて説明する。   Below, the determination method of the welding of the serial connection switches 15-1 and 15-2 which concerns on one Embodiment of this invention is demonstrated using FIG.1 (b).

切替制御部１８２は、複数の電池セル群１０−１〜１０−３を直列に接続することで外部充電を開始する。そして、切替制御部１８２は、外部充電が完了すると、溶着判定の対象である直列接続スイッチ１５−１及び直列接続スイッチ１５−２を順番に一定期間オフ状態に制御する。ここで、溶着判定部１８３は、その一定期間内において、直列接続スイッチ１５−１及び直列接続スイッチ１５−２のそれぞれの溶着判定を行う。具体的には、溶着判定部１８３は、外部充電後において、直列接続スイッチ１５−１がオフ状態に制御されている一定期間中に総電圧Ｖが閾値Ｖｔｈ以下になった場合には、直列接続スイッチ１５−１が溶着していない（正常）と判定する。一方、溶着判定部１８３は、外部充電後において、直列接続スイッチ１５−１がオフ状態に制御されている一定期間中に総電圧Ｖが閾値Ｖｔｈ以下にならなかった場合には、直列接続スイッチ１５−１が溶着している（異常）と判定する。
さらに、溶着判定部１８３は、外部充電後において、直列接続スイッチ１５−１の溶着判定を行った後、直列接続スイッチ１５−２がオフ状態に制御されている一定期間中において直列接続スイッチ１５−１と同様な溶着判定を行う。 The switching control unit 182 starts external charging by connecting a plurality of battery cell groups 10-1 to 10-3 in series. Then, when the external charging is completed, the switching control unit 182 sequentially controls the series connection switch 15-1 and the series connection switch 15-2, which are targets for welding determination, in an off state for a certain period. Here, the welding determination part 183 performs each welding determination of the series connection switch 15-1 and the series connection switch 15-2 within the fixed period. Specifically, after the external charging, the welding determination unit 183 performs serial connection when the total voltage V becomes equal to or lower than the threshold value Vth during a certain period in which the series connection switch 15-1 is controlled to be in an off state. It is determined that the connection switch 15-1 is not welded (normal). On the other hand, if the total voltage V does not fall below the threshold value Vth during a certain period when the series connection switch 15-1 is controlled to be in the OFF state after external charging, the welding determination unit 183 It is determined that 15-1 is welded (abnormal).
Further, the welding determination unit 183 performs welding determination of the series connection switch 15-1 after external charging, and then the series connection switch 15- during a certain period in which the series connection switch 15-2 is controlled to be in an OFF state. The welding determination similar to 1 is performed.

これにより、電池セルの電気的接続を切り替えるスイッチ（直列接続スイッチ１５−１、１５−２）の溶着を検出することができる。   Thereby, welding of the switch (series connection switch 15-1, 15-2) which switches the electrical connection of a battery cell is detectable.

以上、この発明の実施形態について図面を参照して詳述してきたが、具体的な構成はこの実施形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計等も含まれる。   The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

Ａ 充電システム
１ 車両用バッテリ充電装置
２ 外部充電器
１０（１０−１〜１０−３） 電池セル群
１４（１４−１〜１４−６） 並列接続スイッチ
１５（１５−１、１５−２） 直列接続スイッチ
１８ 充電制御部
１８１ 総電圧検出部
１８２ 切替制御部
１８３ 溶着判定部 A Charging system 1 Battery charger 2 for vehicle 2 External charger 10 (10-1 to 10-3) Battery cell group 14 (14-1 to 14-6) Parallel connection switch 15 (15-1, 15-2) Series Connection switch 18 Charging control unit 181 Total voltage detection unit 182 Switching control unit 183 Welding determination unit

Claims (1)

電池セルを直列に接続した複数の電池セル群と、
前記複数の電池セル群の総電圧を検出する総電圧検出部と、
前記複数の電池セル群を並列に接続する並列接続スイッチと、
前記複数の電池セル群の一方の電池セル群の最下位セルと他方の電池セル群の最上位セルとを接続する直列接続スイッチと、
前記複数の電池セル群を並列または直列に切り替えるために、前記並列接続スイッチ及び前記直列接続スイッチをオフまたはオンに制御する切替制御部と、
前記切替制御部によって前記直列接続スイッチをオフ状態に制御している期間中に、前記総電圧に基づいて前記直列接続スイッチの溶着を判定する溶着判定部と、
を備えることを特徴とする車両用バッテリ充電装置。 A plurality of battery cell groups in which battery cells are connected in series;
A total voltage detector for detecting a total voltage of the plurality of battery cell groups;
A parallel connection switch for connecting the plurality of battery cell groups in parallel;
A series connection switch for connecting the lowest cell of one battery cell group of the plurality of battery cell groups and the highest cell of the other battery cell group;
In order to switch the plurality of battery cell groups in parallel or in series, a switching control unit for controlling the parallel connection switch and the series connection switch off or on, and
During the period in which the switching controller controls the series connection switch to an off state, a welding determination unit that determines welding of the series connection switch based on the total voltage;
A vehicle battery charging device comprising:
JP2018053073A 2018-03-20 2018-03-20 Battery charger for vehicle Pending JP2019165583A (en)

Priority Applications (1)

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JP2018053073A JP2019165583A (en) 2018-03-20 2018-03-20 Battery charger for vehicle

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JP2018053073A JP2019165583A (en) 2018-03-20 2018-03-20 Battery charger for vehicle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112848932A (en) * 2021-01-15 2021-05-28 重庆长安新能源汽车科技有限公司 Control method and control system for direct current charging of electric automobile
JP7452370B2 (en) 2020-10-12 2024-03-19 株式会社豊田自動織機 Secondary battery system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7452370B2 (en) 2020-10-12 2024-03-19 株式会社豊田自動織機 Secondary battery system
CN112848932A (en) * 2021-01-15 2021-05-28 重庆长安新能源汽车科技有限公司 Control method and control system for direct current charging of electric automobile
CN112848932B (en) * 2021-01-15 2022-05-31 重庆长安新能源汽车科技有限公司 Control method and control system for direct current charging of electric automobile

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