JP6587466B2 - Battery testing equipment - Google Patents

Battery testing equipment Download PDF

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JP6587466B2
JP6587466B2 JP2015176094A JP2015176094A JP6587466B2 JP 6587466 B2 JP6587466 B2 JP 6587466B2 JP 2015176094 A JP2015176094 A JP 2015176094A JP 2015176094 A JP2015176094 A JP 2015176094A JP 6587466 B2 JP6587466 B2 JP 6587466B2
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battery
power
bidirectional
converter
charge
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善久 北条
善久 北条
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Toyo Electric Manufacturing Ltd
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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

Description

本発明は、バッテリの充電及び放電を繰返してバッテリの耐久性を試験する装置に関する。   The present invention relates to an apparatus for testing battery durability by repeatedly charging and discharging a battery.

従来、例えば二次電池など充放電が可能なバッテリの充放電を繰返して、バッテリの耐久性（劣化度）を試験する装置が知られている。例えば、特許文献１には、バッテリの充放電試験システムの電力使用効率を向上させるために、１台の双方向ＡＣ−ＤＣコンバータのＤＣ側に複数の双方向ＤＣ−ＤＣコンバータを並列に接続し、各双方向ＤＣ−ＤＣコンバータの出力側にバッテリを配置する手法が開示されている。   2. Description of the Related Art Conventionally, there is known an apparatus that tests the durability (deterioration degree) of a battery by repeatedly charging and discharging a battery that can be charged and discharged such as a secondary battery. For example, in Patent Document 1, a plurality of bidirectional DC-DC converters are connected in parallel to the DC side of one bidirectional AC-DC converter in order to improve the power usage efficiency of a battery charge / discharge test system. A method of disposing a battery on the output side of each bidirectional DC-DC converter is disclosed.

図２を参照して、従来の試験システムについて説明する。図２は、従来技術に係る試験システムのブロック図である。図２に示す試験システムは、双方向ＡＣ−ＤＣコンバータ７と、２つの双方向ＤＣ−ＤＣコンバータ２１，２２と、２つの試験対象であるバッテリ１３，１４と、充放電制御部３１と、電源系統６と、を備える。   A conventional test system will be described with reference to FIG. FIG. 2 is a block diagram of a test system according to the prior art. The test system shown in FIG. 2 includes a bidirectional AC-DC converter 7, two bidirectional DC-DC converters 21 and 22, two batteries 13 and 14 to be tested, a charge / discharge control unit 31, a power supply And a system 6.

双方向ＡＣ−ＤＣコンバータ７は、電源系統６の交流電力を直流電力に変換して双方向ＤＣ−ＤＣコンバータ２１，２２に直流電力を供給する機能を有する。また、双方向ＡＣ−ＤＣコンバータ７は、双方向ＤＣ−ＤＣコンバータ２１，２２から回生される直流電力を交流電力に変換して電源系統６に交流電力を回生する機能を有する。   The bidirectional AC-DC converter 7 has a function of converting the AC power of the power supply system 6 into DC power and supplying the DC power to the bidirectional DC-DC converters 21 and 22. The bidirectional AC-DC converter 7 has a function of converting the DC power regenerated from the bidirectional DC-DC converters 21 and 22 into AC power and regenerating the AC power to the power supply system 6.

双方向ＤＣ−ＤＣコンバータ２１の出力側に、バッテリ１３が接続される。また、双方向ＤＣ−ＤＣコンバータ２２の出力側に、バッテリ１４が接続される。   A battery 13 is connected to the output side of the bidirectional DC-DC converter 21. A battery 14 is connected to the output side of the bidirectional DC-DC converter 22.

充放電制御部３１には、バッテリ１３の端子電圧Ｖ３及び電流Ｉ３、ならびにバッテリ１４の端子電圧Ｖ４及び電流Ｉ４の情報が入力される。充放電制御部３１は、入力される情報に基づいて、バッテリ１３の充放電を制御する充放電指令を生成し、当該充放電指令を双方向ＤＣ−ＤＣコンバータ２１に与える。また、充放電制御部３１は、入力される情報に基づいて、バッテリ１４の充放電を制御する充放電指令を生成し、当該充放電指令を双方向ＤＣ−ＤＣコンバータ２２に与える。   Information on the terminal voltage V3 and current I3 of the battery 13, and the terminal voltage V4 and current I4 of the battery 14 is input to the charge / discharge control unit 31. The charge / discharge control unit 31 generates a charge / discharge command for controlling the charge / discharge of the battery 13 based on the input information, and gives the charge / discharge command to the bidirectional DC-DC converter 21. Further, the charge / discharge control unit 31 generates a charge / discharge command for controlling the charge / discharge of the battery 14 based on the input information, and gives the charge / discharge command to the bidirectional DC-DC converter 22.

充放電指令により、バッテリ１３，１４の充放電パターンは、双方向ＡＣ−ＤＣコンバータ７から供給される電力又は双方向ＡＣ−ＤＣコンバータ７に回生される電力が極力少なくなるようにスケジューリングされる。   According to the charge / discharge command, the charge / discharge patterns of the batteries 13 and 14 are scheduled so that the power supplied from the bidirectional AC-DC converter 7 or the power regenerated in the bidirectional AC-DC converter 7 is minimized.

このようにして、電源系統６から双方向ＡＣ−ＤＣコンバータ７に供給される電力及びＡＣ−ＤＣコンバータ７から電源系統６に回生される電力が低減され、電力使用効率が向上する。   In this way, the power supplied from the power supply system 6 to the bidirectional AC-DC converter 7 and the power regenerated from the AC-DC converter 7 to the power supply system 6 are reduced, and the power use efficiency is improved.

特開２０１２−１５４７９３号公報JP 2012-154793 A

しかしながら、従来技術において、バッテリの評価試験の充放電パターンに応じて瞬間的に大きな供給電力又は回生電力が発生する場合があった。このため、電源系統６及び双方向ＡＣ−ＤＣコンバータ７には、発生し得る大きな供給電力又は回生電力に適合するために大きな容量が必要であった。電源系統６及び双方向ＡＣ−ＤＣコンバータ７の大容量化は、試験装置の大型化又はコストの増加などの不都合をもたらす。   However, in the prior art, large supply power or regenerative power may be instantaneously generated according to the charge / discharge pattern of the battery evaluation test. For this reason, the power supply system 6 and the bidirectional AC-DC converter 7 require a large capacity in order to adapt to a large supply power or regenerative power that can be generated. Increasing the capacity of the power supply system 6 and the bidirectional AC-DC converter 7 causes inconveniences such as an increase in the size of the test apparatus or an increase in cost.

かかる事情に鑑みてなされた本発明の目的は、電源系統からの供給電力又は電源系統への回生電力を低減可能なバッテリの試験装置を提供することにある。   An object of the present invention made in view of such circumstances is to provide a battery testing apparatus capable of reducing power supplied from a power supply system or regenerative power to the power supply system.

上記課題を解決するために本発明に係るバッテリの試験装置は、一方の入出力端子に充放電可能な第１のバッテリが接続され、他方の入出力端子に充放電可能な第２のバッテリが接続され、電圧の昇降圧機能を有する双方向ＤＣ−ＤＣコンバータと、前記第１のバッテリ及び前記第２のバッテリのうち少なくとも一方に電力を供給する充電器と、前記第１のバッテリの電流及び電圧ならびに前記第２のバッテリの電流及び電圧に基づいて、前記第１のバッテリと前記第２のバッテリとの間で充放電を行う第１の指令と、前記第１のバッテリ、前記第２のバッテリ、及び前記双方向ＤＣ−ＤＣコンバータで発生する損失分以上の電力を供給する第２の指令とを生成し、前記第１の指令を前記双方向ＤＣ−ＤＣコンバータに与え、前記第２の指令を前記充電器に与える充放電制御部と、前記第１のバッテリの電流及び電圧に基づいて前記第１のバッテリの劣化度を評価する評価部と、を備え、前記充放電制御部は、前記第１のバッテリを充電するための前記第２のバッテリの放電電力が不足している場合、前記損失分及び前記放電電力の不足分を補償する前記第２の指令を生成することを特徴とする。 In order to solve the above problems, a battery testing apparatus according to the present invention has a first battery that can be charged / discharged at one input / output terminal and a second battery that can be charged / discharged at the other input / output terminal. A bidirectional DC-DC converter connected and having a voltage step-up / step-down function; a charger for supplying power to at least one of the first battery and the second battery; a current of the first battery; A first command for charging / discharging between the first battery and the second battery based on the voltage and the current and voltage of the second battery; the first battery; and the second battery Generating a battery and a second command for supplying power that is greater than or equal to the loss generated in the bidirectional DC-DC converter, providing the first command to the bidirectional DC-DC converter, Command A discharge control unit that gives the charger, and an evaluation unit for evaluating the degree of deterioration of the first battery based on the current and voltage of the first battery, the charging and discharging control unit, said first when the discharge power of the second battery for charging a battery is insufficient, characterized that you generate the second command to compensate for the shortage of the loss and the discharge power .

また、本発明に係る試験装置において、前記第２のバッテリは、前記第１のバッテリの容量以上の容量を有し、試験開始時において、前記第１のバッテリの残量と前記第２のバッテリの残量との和が前記第１のバッテリの容量以上かつ前記第２のバッテリの容量以下であることが好ましい。   In the test apparatus according to the present invention, the second battery has a capacity equal to or greater than the capacity of the first battery, and the remaining amount of the first battery and the second battery at the start of the test. It is preferable that the sum of the remaining amount is equal to or more than the capacity of the first battery and equal to or less than the capacity of the second battery.

また、本発明に係る試験装置において、前記第１のバッテリの容量と前記第２のバッテリの容量とが実質的に等しく、前記評価部は、前記第１のバッテリの劣化度の評価とともに、前記第２のバッテリの電流及び電圧に基づいて前記第２のバッテリの劣化度を評価することが好ましい。   Further, in the test apparatus according to the present invention, the capacity of the first battery and the capacity of the second battery are substantially equal, and the evaluation unit includes the evaluation of the degree of deterioration of the first battery. It is preferable to evaluate the degree of deterioration of the second battery based on the current and voltage of the second battery.

本発明に係るバッテリの試験装置によれば、電源系統からの供給電力又は電源系統への回生電力を低減可能である。   According to the battery testing apparatus of the present invention, the power supplied from the power supply system or the regenerative power to the power supply system can be reduced.

本発明の一実施形態に係るバッテリの試験システムの概略構成を示すブロック図である。1 is a block diagram showing a schematic configuration of a battery test system according to an embodiment of the present invention. 従来技術に係るバッテリの試験システムの概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the test system of the battery which concerns on a prior art.

以下、本発明の一実施形態について、図面を参照して説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

（第１の実施形態）
図１は、本発明の第１の実施形態に係るバッテリの試験システムの概略構成を示すブロック図である。本実施形態に係るバッテリの試験システムは、評価試験対象であるバッテリを所定の充放電パターンに従って充放電させることによって、バッテリの耐久性（例えば、劣化度）を評価する。劣化度は、例えばＳＯＨ（State Of Health）であるが、任意の指標を採用可能である。 (First embodiment)
FIG. 1 is a block diagram showing a schematic configuration of a battery test system according to the first embodiment of the present invention. The battery test system according to the present embodiment evaluates the durability (for example, the degree of deterioration) of the battery by charging and discharging the battery that is the subject of the evaluation test according to a predetermined charge / discharge pattern. The degree of deterioration is, for example, SOH (State Of Health), but any index can be adopted.

図１に示すバッテリの試験システムは、双方向ＤＣ−ＤＣコンバータ２０、充放電制御部３０、評価部４、充電器５、及び電源系統６を有する試験装置８と、第１のバッテリ１１と、第２のバッテリ１２と、を備える。バッテリの試験システムにおいて、第１のバッテリ１１及び第２のバッテリ１２のうち少なくとも一方が評価試験対象に定められる。以下、第１のバッテリ１１を評価試験対象として説明する。   The battery test system shown in FIG. 1 includes a bidirectional DC-DC converter 20, a charge / discharge control unit 30, an evaluation unit 4, a charger 5, and a power supply system 6, a first battery 11, A second battery 12. In the battery test system, at least one of the first battery 11 and the second battery 12 is set as an evaluation test target. Hereinafter, the first battery 11 will be described as an evaluation test target.

第１のバッテリ１１及び第２のバッテリ１２は、例えばリチウムイオン電池又は鉛蓄電池など、充放電可能な二次電池である。第１のバッテリ１１は、双方向ＤＣ−ＤＣコンバータ２０の一方の入出力端子に接続される。第２のバッテリ１２は、双方向ＤＣ−ＤＣコンバータ２０の他方の入出力端子、及び充電器５の出力端子に接続される。   The first battery 11 and the second battery 12 are rechargeable secondary batteries such as a lithium ion battery or a lead storage battery. The first battery 11 is connected to one input / output terminal of the bidirectional DC-DC converter 20. The second battery 12 is connected to the other input / output terminal of the bidirectional DC-DC converter 20 and the output terminal of the charger 5.

第１のバッテリ１１と第２のバッテリ１２との接続位置関係を入替えてもよい。かかる場合、第１のバッテリ１１は、双方向ＤＣ−ＤＣコンバータ２０の一方の入出力端子、及び充電器５の出力端子に接続される。第２のバッテリ１２は、双方向ＤＣ−ＤＣコンバータ２０の他方の入出力端子に接続される。   The connection position relationship between the first battery 11 and the second battery 12 may be interchanged. In such a case, the first battery 11 is connected to one input / output terminal of the bidirectional DC-DC converter 20 and the output terminal of the charger 5. The second battery 12 is connected to the other input / output terminal of the bidirectional DC-DC converter 20.

双方向ＤＣ−ＤＣコンバータ２０は、２つの入出力端子を有しており、電圧の昇降圧機能を有する。双方向ＤＣ−ＤＣコンバータ２０の動作は、充放電制御部３０が生成した後述する第１の指令によって制御される。双方向ＤＣ−ＤＣコンバータ２０は、第１の指令に従って、第１のバッテリ１１と第２のバッテリ１２との間で充放電を行う。具体的には、双方向ＤＣ−ＤＣコンバータ２０は、第１のバッテリ１１を放電させる場合、第１のバッテリ１１の放電電力を第２のバッテリ１２に供給する。一方、双方向ＤＣ−ＤＣコンバータ２０は、第２のバッテリ１２を放電させる場合、第２のバッテリ１２の放電電力を第１のバッテリ１１に供給する。   The bidirectional DC-DC converter 20 has two input / output terminals and has a voltage step-up / step-down function. The operation of the bidirectional DC-DC converter 20 is controlled by a first command (described later) generated by the charge / discharge control unit 30. The bidirectional DC-DC converter 20 performs charging / discharging between the first battery 11 and the second battery 12 in accordance with the first command. Specifically, the bidirectional DC-DC converter 20 supplies the discharge power of the first battery 11 to the second battery 12 when discharging the first battery 11. On the other hand, the bidirectional DC-DC converter 20 supplies the discharge power of the second battery 12 to the first battery 11 when discharging the second battery 12.

電源系統６は、充電器５の入力端子に接続される。電源系統６は、交流電力を充電器５に入力する。電源系統６は、三相交流電源であるが、単相交流電源又は直流電源など、任意の電源を採用可能である。   The power supply system 6 is connected to the input terminal of the charger 5. The power supply system 6 inputs AC power to the charger 5. The power supply system 6 is a three-phase AC power supply, but any power supply such as a single-phase AC power supply or a DC power supply can be used.

充電器５は、例えばＡＣ−ＤＣコンバータであって、電源系統６から入力される交流電力を直流電力に変換して出力する機能を有する。或いは、充電器５は、例えば双方向ＡＣ−ＤＣコンバータであって、第２のバッテリ１２を介する回生電力を電源系統６に供給する機能を更に有してもよい。充電器５の動作は、充放電制御部３０が生成した後述する第２の指令によって制御される。具体的には、充電器５は、第２の指令に基づいて、第１のバッテリ１１、第２のバッテリ１２、及び双方向ＤＣ−ＤＣコンバータ２０で発生する損失分以上の直流電力を第２のバッテリ１２に供給する。換言すると、第２の指令に基づいて供給される直流電力により、発生する損失が補償される。充電器５は、損失分を補償するための電力に加えて、第２のバッテリ１２及び双方向ＤＣ−ＤＣコンバータ２０を介して第１のバッテリ１１を充電するための電力を更に供給してもよい。   The charger 5 is, for example, an AC-DC converter, and has a function of converting AC power input from the power supply system 6 into DC power and outputting the DC power. Alternatively, the charger 5 is a bidirectional AC-DC converter, for example, and may further have a function of supplying regenerative power via the second battery 12 to the power supply system 6. The operation of the charger 5 is controlled by a second command described later generated by the charge / discharge control unit 30. Specifically, based on the second command, the charger 5 supplies the second direct current power equal to or greater than the loss generated in the first battery 11, the second battery 12, and the bidirectional DC-DC converter 20. The battery 12 is supplied. In other words, the generated loss is compensated for by the DC power supplied based on the second command. The charger 5 may further supply power for charging the first battery 11 via the second battery 12 and the bidirectional DC-DC converter 20 in addition to power for compensating for the loss. Good.

充放電制御部３０には、第１のバッテリ１１の充放電電流Ｉ１及び端子電圧Ｖ１ならびに第２のバッテリ１２の充放電電流Ｉ２及び端子電圧Ｖ２を示す情報が入力される。   Information indicating the charge / discharge current I1 and the terminal voltage V1 of the first battery 11 and the charge / discharge current I2 and the terminal voltage V2 of the second battery 12 are input to the charge / discharge control unit 30.

充放電制御部３０は、評価試験の開始以後、入力された情報に基づいて第１の指令を生成する。具体的には、充放電制御部３０は、入力された情報を監視して、第１のバッテリ１１の評価試験を実行するための所定の充放電パターンに従って第１のバッテリ１１と第２のバッテリ１２との間で充放電を行うように、双方向ＤＣ−ＤＣコンバータ２０の動作を制御する第１の指令を生成する。例えば、第１の指令は、第１のバッテリ１１の電流制御を行うための電流指令、及び第２のバッテリ１２の電圧Ｖ２の大きさに応じた電圧制御を行うための電圧指令を含む。   The charge / discharge control unit 30 generates a first command based on the input information after the start of the evaluation test. Specifically, the charge / discharge control unit 30 monitors the input information and performs the first battery 11 and the second battery according to a predetermined charge / discharge pattern for executing an evaluation test of the first battery 11. The first command for controlling the operation of the bidirectional DC-DC converter 20 is generated so as to charge / discharge with the power source 12. For example, the first command includes a current command for performing current control of the first battery 11 and a voltage command for performing voltage control in accordance with the magnitude of the voltage V <b> 2 of the second battery 12.

また、充放電制御部３０は、評価試験の開始以後、入力された情報に基づいて第２の指令を生成する。具体的には、充放電制御部３０は、入力された情報を用いる演算により、第１のバッテリ１１、第２のバッテリ１２、及び双方向ＤＣ−ＤＣコンバータ２０で発生する損失を算出する。充放電制御部３０は、算出した損失分を少なくとも補償するように、充電器５の出力電力を制御する第２の指令を生成する。充放電制御部３０は、第１のバッテリ１１を充電するための第２のバッテリ１２の放電電力が不足している場合、算出した損失分に加えて当該不足分を更に補償するように、第２の指令を生成してもよい。   Moreover, the charge / discharge control part 30 produces | generates a 2nd instruction | command based on the input information after the start of an evaluation test. Specifically, the charge / discharge control unit 30 calculates a loss generated in the first battery 11, the second battery 12, and the bidirectional DC-DC converter 20 by a calculation using the input information. The charge / discharge control unit 30 generates a second command for controlling the output power of the charger 5 so as to at least compensate the calculated loss. When the discharge power of the second battery 12 for charging the first battery 11 is insufficient, the charge / discharge control unit 30 is configured to further compensate for the shortage in addition to the calculated loss. Two commands may be generated.

そして、充放電制御部３０は、第１の指令を双方向ＤＣ−ＤＣコンバータ２０に与え、第２の指令を充電器５に与える。換言すると、充放電制御部３０は、第１の指令及び第２の指令を介して、双方向ＤＣ−ＤＣコンバータ２０の動作及び充電器５の動作をそれぞれ制御する。   Then, the charge / discharge control unit 30 gives the first command to the bidirectional DC-DC converter 20 and gives the second command to the charger 5. In other words, the charge / discharge control unit 30 controls the operation of the bidirectional DC-DC converter 20 and the operation of the charger 5 through the first command and the second command, respectively.

好適には、充放電制御部３０は、入力された情報に基づいて、第１のバッテリ１１の充電状態及び第２のバッテリ１２の充電状態を算出する。充電状態は、例えば充電率（ＳＯＣ：State Of Charge）又は残量（ＲＣ：Remaining Capacity）であるが、任意の指標を採用可能である。   Preferably, the charge / discharge control unit 30 calculates the charge state of the first battery 11 and the charge state of the second battery 12 based on the input information. The state of charge is, for example, a charging rate (SOC: State Of Charge) or a remaining amount (RC: Remaining Capacity), but any index can be adopted.

評価部４は、第１のバッテリ１１の充放電電流Ｉ１及び端子電圧Ｖ１ならびに第２のバッテリ１２の充放電電流Ｉ２及び端子電圧Ｖ２を示す情報が入力される。評価部４は、入力された情報に基づいて、評価試験対象である第１のバッテリ１１の劣化度を評価する。   The evaluation unit 4 receives information indicating the charge / discharge current I1 and the terminal voltage V1 of the first battery 11 and the charge / discharge current I2 and the terminal voltage V2 of the second battery 12. The evaluation unit 4 evaluates the degree of deterioration of the first battery 11 that is the object of the evaluation test, based on the input information.

上述したように、第１の実施形態に係るバッテリの試験装置８によれば、双方向ＤＣ−ＤＣコンバータ２０が、第２のバッテリ１２の放電電力を用いて第１のバッテリ１１を充電するので、第１のバッテリ１１を充電するために電源系統６から供給される電力が低減される。また、双方向ＤＣ−ＤＣコンバータ２０が、第１のバッテリ１１の放電電力を用いて第２のバッテリ１２を充電するので、第１のバッテリ１１から電源系統６へ回生される電力が低減される。同様に、充電器５の入出力電力が低減される。このように、評価試験において電源系統６の供給電力及び回生電力が低減されるので、電源系統６の容量及び充電器５の容量を低減可能である。   As described above, according to the battery testing apparatus 8 according to the first embodiment, the bidirectional DC-DC converter 20 charges the first battery 11 using the discharge power of the second battery 12. The electric power supplied from the power supply system 6 for charging the first battery 11 is reduced. Moreover, since the bidirectional DC-DC converter 20 charges the second battery 12 using the discharge power of the first battery 11, the power regenerated from the first battery 11 to the power supply system 6 is reduced. . Similarly, the input / output power of the charger 5 is reduced. Thus, since the supply power and regenerative power of the power supply system 6 are reduced in the evaluation test, the capacity of the power supply system 6 and the capacity of the charger 5 can be reduced.

（第２の実施形態）
次に、本願発明の第２の実施形態について説明する。本実施形態に係るバッテリの試験システムの構成は、第１の実施形態と同様であるが、第１のバッテリ１１の容量と第２のバッテリ１２の容量との関係が定められる点、及び評価試験開始時における第１のバッテリ１１の残量と第２のバッテリ１２の残量との初期条件が定められる点が異なる。 (Second Embodiment)
Next, a second embodiment of the present invention will be described. The configuration of the battery test system according to this embodiment is the same as that of the first embodiment, but the relationship between the capacity of the first battery 11 and the capacity of the second battery 12 is determined, and an evaluation test. The difference is that the initial conditions of the remaining amount of the first battery 11 and the remaining amount of the second battery 12 at the start are determined.

本実施形態において、評価試験対象である第１のバッテリ１１の容量Ｃ１以上の容量Ｃ２を有するバッテリが、第２のバッテリ１２として採用される。換言すると、式（１）に示すように、第２のバッテリ１２の容量Ｃ２は、第１のバッテリ１１の容量Ｃ１以上とする。
Ｃ１≦Ｃ２ （１） In the present embodiment, a battery having a capacity C <b> 2 that is greater than or equal to the capacity C <b> 1 of the first battery 11 to be evaluated is adopted as the second battery 12. In other words, as shown in Expression (1), the capacity C2 of the second battery 12 is set to be equal to or greater than the capacity C1 of the first battery 11.
C1 ≦ C2 (1)

また、本実施形態において、式（２）に示すように、評価試験開始時における第１のバッテリ１１の残量ＲＣ１と第２のバッテリ１２の残量ＲＣ２との和が、第１のバッテリ１１の容量Ｃ１以上かつ第２のバッテリ１２の容量Ｃ２以下とする。
Ｃ１≦ＲＣ１＋ＲＣ２≦Ｃ２ （２） In the present embodiment, as shown in Expression (2), the sum of the remaining amount RC1 of the first battery 11 and the remaining amount RC2 of the second battery 12 at the start of the evaluation test is the first battery 11. The capacity C1 of the second battery 12 and the capacity C2 of the second battery 12 or less.
C1 ≦ RC1 + RC2 ≦ C2 (2)

上述したように、第２の実施形態に係るバッテリの試験装置８によれば、上述の式（１）及び式（２）を満たす。このため、以下に説明するように、評価試験において電源系統の供給電力及び回生電力が更に低減されるので、電源系統６の容量及び充電器５の容量を更に低減可能である。   As described above, according to the battery testing apparatus 8 according to the second embodiment, the above expressions (1) and (2) are satisfied. For this reason, as will be described below, the supply power and regenerative power of the power supply system are further reduced in the evaluation test, so that the capacity of the power supply system 6 and the capacity of the charger 5 can be further reduced.

いくつかの評価試験において、評価試験対象である第１のバッテリ１１の充電率ＳＯＣ１が０％〜１００％の範囲で変化するように第１のバッテリ１１を充放電させることが考えられる。例えば、第１のバッテリ１１の充電率ＳＯＣ１が１００％から０％になるまで第１のバッテリ１１を放電させる場合、式（１）及び式（２）を満たすので、第２のバッテリ１２は、第１のバッテリ１１の全放電電力を蓄電可能である。このため、第１のバッテリ１１から電源系統６への回生電力の発生を抑制可能である。また、第２のバッテリ１２が蓄えた電力を第１のバッテリ１１に供給することにより、電源系統６から第１のバッテリ１１を充電するための電力を供給されることなく、第１のバッテリ１１の充電率ＳＯＣ１が０％から１００％になるまで第１のバッテリ１１を充電可能である。したがって、電源系統６は、第１のバッテリ１１、第２のバッテリ１２、及び双方向ＤＣ−ＤＣコンバータ２０で発生する損失分に相当する電力のみを供給すればよいので、電源系統６による供給電力が更に低減される。同様に、充電器５の入出力電力が更に低減される。   In some evaluation tests, it is conceivable to charge / discharge the first battery 11 so that the charging rate SOC1 of the first battery 11 to be evaluated is changed in the range of 0% to 100%. For example, when the first battery 11 is discharged until the charging rate SOC1 of the first battery 11 is changed from 100% to 0%, since the expressions (1) and (2) are satisfied, the second battery 12 is The total discharge power of the first battery 11 can be stored. For this reason, generation | occurrence | production of the regenerative electric power from the 1st battery 11 to the power supply system 6 can be suppressed. In addition, by supplying the power stored in the second battery 12 to the first battery 11, the first battery 11 is not supplied with power for charging the first battery 11 from the power supply system 6. The first battery 11 can be charged until the charging rate SOC1 of the battery becomes 0% to 100%. Therefore, the power supply system 6 only needs to supply power corresponding to the loss generated in the first battery 11, the second battery 12, and the bidirectional DC-DC converter 20. Is further reduced. Similarly, the input / output power of the charger 5 is further reduced.

また、上述のように第１のバッテリ１１から電源系統６への回生電力の発生が抑制されるので、回生機能を有さない一方向ＡＣ−ＤＣコンバータを充電器５として採用可能となる。一方向ＡＣ−ＤＣコンバータの採用により、充電器５の小型化又はコスト低減が可能である。   Moreover, since generation | occurrence | production of the regenerative power from the 1st battery 11 to the power supply system 6 is suppressed as mentioned above, the one-way AC-DC converter which does not have a regeneration function can be employ | adopted as the charger 5. By adopting the one-way AC-DC converter, the charger 5 can be reduced in size or cost.

（第３の実施形態）
次に、本願発明の第３の実施形態について説明する。本実施形態に係るバッテリの試験システムの構成は、第１の実施形態と同様であるが、第１のバッテリ１１及び第２のバッテリ１２の両方を評価試験対象に定めて、第１のバッテリ１１の劣化度及び第２のバッテリ１２の劣化度を同時に評価する点が異なる。 (Third embodiment)
Next, a third embodiment of the present invention will be described. The configuration of the battery test system according to the present embodiment is the same as that of the first embodiment. However, both the first battery 11 and the second battery 12 are set as evaluation test targets, and the first battery 11 is selected. The difference is that the deterioration degree of the second battery 12 and the deterioration degree of the second battery 12 are simultaneously evaluated.

本実施形態において、容量が実質的に等しい２つのバッテリが、第１のバッテリ１１及び第２のバッテリ１２としてそれぞれ採用される。したがって、式（３）に示すように、第１のバッテリ１１の容量Ｃ１と第２のバッテリ１２の容量Ｃ２とが実質的に等しい。
Ｃ１＝Ｃ２ （３） In the present embodiment, two batteries having substantially the same capacity are employed as the first battery 11 and the second battery 12, respectively. Therefore, as shown in Expression (3), the capacity C1 of the first battery 11 and the capacity C2 of the second battery 12 are substantially equal.
C1 = C2 (3)

評価部４は、第１の実施形態と同様に、第１のバッテリ１１の充放電電流Ｉ１及び端子電圧Ｖ１ならびに第２のバッテリ１２の充放電電流Ｉ２及び端子電圧Ｖ２を示す情報が入力される。評価部４は、入力された情報に基づいて、評価試験対象である第１のバッテリ１１及び第２のバッテリ１２の各劣化度を評価する。   As in the first embodiment, the evaluation unit 4 receives information indicating the charge / discharge current I1 and the terminal voltage V1 of the first battery 11 and the charge / discharge current I2 and the terminal voltage V2 of the second battery 12. . The evaluation unit 4 evaluates the degree of deterioration of each of the first battery 11 and the second battery 12 that are the object of the evaluation test based on the input information.

上述したように、第３の実施形態に係るバッテリの試験装置８によれば、第１の実施形態と同様に、電源系統６の容量及び充電器５の容量を低減可能である。更に、第３の実施形態に係るバッテリの試験装置８によれば、式（３）を満たすので、以下に説明するように、第１のバッテリ１１及び第２のバッテリ１２を同時に評価可能である。   As described above, according to the battery testing apparatus 8 according to the third embodiment, the capacity of the power supply system 6 and the capacity of the charger 5 can be reduced as in the first embodiment. Furthermore, according to the battery test apparatus 8 according to the third embodiment, since the expression (3) is satisfied, the first battery 11 and the second battery 12 can be evaluated simultaneously as described below. .

本実施形態において、第１のバッテリ１１の充電状態及び第２のバッテリ１２の充電状態は、増減について略対称に推移する。例えば、所定の放電パターンにより放電される第１のバッテリ１１の充電率ＳＯＣ１が１００％から０％に推移する間に、第２のバッテリ１２が当該放電パターンと充放電について対称の充電パターンにより充電され、第２のバッテリ１２の充電率ＳＯＣ２が０％から１００％に推移する。したがって、充電パターンと放電パターンとが充放電について対称である充放電パターンにより、第１のバッテリ１１及び第２のバッテリ１２の劣化度を同時に評価可能である。   In the present embodiment, the state of charge of the first battery 11 and the state of charge of the second battery 12 change substantially symmetrically with respect to increase / decrease. For example, while the charging rate SOC1 of the first battery 11 discharged according to a predetermined discharge pattern changes from 100% to 0%, the second battery 12 is charged with a symmetrical charging pattern with respect to the discharging pattern and charging / discharging. Thus, the charging rate SOC2 of the second battery 12 changes from 0% to 100%. Therefore, the deterioration degree of the 1st battery 11 and the 2nd battery 12 can be evaluated simultaneously by the charging / discharging pattern whose charging pattern and discharging pattern are symmetrical with respect to charging / discharging.

本発明を諸図面や実施例に基づき説明してきたが、当業者であれば本開示に基づき種々の変形や修正を行うことが容易であることに注意されたい。したがって、これらの変形や修正は本発明の範囲に含まれることに留意されたい。   Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention.

例えば、上述した第２の実施形態において、試験装置８に接続された第１のバッテリ１１の残量ＲＣ１と第２のバッテリ１２の残量ＲＣ２とが式（２）を満たしていない場合、充放電制御部３０は、式（２）を満たすように、評価試験開始前に第１のバッテリ１１のバッテリ及び第２のバッテリ１２の少なくとも一方を充電又は放電させてもよい。例えば、充放電制御部３０は、第１のバッテリ１１及び第２のバッテリ１２の少なくとも一方を放電させる第３の指令を生成して双方向ＤＣ−ＤＣコンバータ２０に与えてもよい。或いは、充放電制御部３０は、第２のバッテリ１２を充電させる第４の指令を生成して充電器５に与えてもよい。かかる場合、充放電制御部３０は、複数種類のバッテリの容量（設計容量）を予め記憶しておき、接続されたバッテリの種類に対応する容量を抽出して、式（２）のＣ１及びＣ２として用いる。バッテリの種類は、例えば試験装置８を操作するユーザの入力に基づいて決定される。   For example, in the second embodiment described above, if the remaining amount RC1 of the first battery 11 and the remaining amount RC2 of the second battery 12 connected to the test apparatus 8 do not satisfy the formula (2), The discharge control unit 30 may charge or discharge at least one of the battery of the first battery 11 and the second battery 12 before the evaluation test is started so as to satisfy Expression (2). For example, the charge / discharge control unit 30 may generate a third command for discharging at least one of the first battery 11 and the second battery 12 and give the third command to the bidirectional DC-DC converter 20. Alternatively, the charge / discharge control unit 30 may generate a fourth command for charging the second battery 12 and give the fourth command to the charger 5. In such a case, the charge / discharge control unit 30 stores the capacities (design capacities) of a plurality of types of batteries in advance, extracts the capacities corresponding to the types of the connected batteries, and C1 and C2 in Expression (2) Used as The type of battery is determined based on, for example, an input from a user who operates the test apparatus 8.

１１，１２ バッテリ
２０ 双方向ＤＣ−ＤＣコンバータ
３０ 充放電制御部
４ 評価部
５ 充電器
６ 電源系統
８ 試験装置 DESCRIPTION OF SYMBOLS 11,12 Battery 20 Bidirectional DC-DC converter 30 Charge / discharge control part 4 Evaluation part 5 Charger 6 Power supply system 8 Test apparatus

Claims (3)

一方の入出力端子に充放電可能な第１のバッテリが接続され、他方の入出力端子に充放電可能な第２のバッテリが接続され、電圧の昇降圧機能を有する双方向ＤＣ−ＤＣコンバータと、
前記第１のバッテリ及び前記第２のバッテリのうち少なくとも一方に電力を供給する充電器と、
前記第１のバッテリの電流及び電圧ならびに前記第２のバッテリの電流及び電圧に基づいて、前記第１のバッテリと前記第２のバッテリとの間で充放電を行う第１の指令と、前記第１のバッテリ、前記第２のバッテリ、及び前記双方向ＤＣ−ＤＣコンバータで発生する損失分以上の電力を供給する第２の指令とを生成し、前記第１の指令を前記双方向ＤＣ−ＤＣコンバータに与え、前記第２の指令を前記充電器に与える充放電制御部と、
前記第１のバッテリの電流及び電圧に基づいて前記第１のバッテリの劣化度を評価する評価部と、
を備え、
前記充放電制御部は、前記第１のバッテリを充電するための前記第２のバッテリの放電電力が不足している場合、前記損失分及び前記放電電力の不足分を補償する前記第２の指令を生成する、バッテリの試験装置。 A bidirectional DC-DC converter having one input / output terminal connected to a chargeable / dischargeable first battery and the other input / output terminal connected to a chargeable / dischargeable second battery and having a voltage step-up / step-down function; ,
A charger for supplying power to at least one of the first battery and the second battery;
A first command for charging / discharging between the first battery and the second battery based on the current and voltage of the first battery and the current and voltage of the second battery; 1 battery, the second battery, and a second command for supplying power equal to or greater than the loss generated in the bidirectional DC-DC converter, and the first command is generated as the bidirectional DC-DC. A charge / discharge control unit that applies to the converter and applies the second command to the charger;
An evaluation unit that evaluates the degree of deterioration of the first battery based on the current and voltage of the first battery;
Equipped with a,
When the discharge power of the second battery for charging the first battery is insufficient, the charge / discharge control unit compensates for the loss and the shortage of the discharge power. that generates a battery test device. 請求項１に記載の試験装置であって、
前記第２のバッテリは、前記第１のバッテリの容量以上の容量を有し、
試験開始時において、前記第１のバッテリの残量と前記第２のバッテリの残量との和が前記第１のバッテリの容量以上かつ前記第２のバッテリの容量以下である、試験装置。 The test apparatus according to claim 1,
The second battery has a capacity equal to or greater than the capacity of the first battery;
The test apparatus, wherein the sum of the remaining amount of the first battery and the remaining amount of the second battery is not less than the capacity of the first battery and not more than the capacity of the second battery at the start of the test. 請求項１に記載の試験装置であって、
前記第１のバッテリの容量と前記第２のバッテリの容量とが実質的に等しく、
前記評価部は、前記第１のバッテリの劣化度の評価とともに、前記第２のバッテリの電流及び電圧に基づいて前記第２のバッテリの劣化度を評価する、試験装置。 The test apparatus according to claim 1,
The capacity of the first battery and the capacity of the second battery are substantially equal;
The said evaluation part is a test apparatus which evaluates the deterioration degree of a said 2nd battery based on the electric current and voltage of a said 2nd battery with evaluation of the deterioration degree of a said 1st battery.
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CN111431255A (en) * 2020-03-23 2020-07-17 广西玉林浩杰新能源科技有限公司 Energy-saving charger aging system
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KR20210113008A (en) * 2020-03-06 2021-09-15 주식회사 서오 Battery charge and discharge test system with energy recycling
KR102606030B1 (en) * 2020-03-06 2023-11-24 주식회사 서오 Battery charge and discharge test system with energy recycling

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