CAPACITY RECOVERY DEVICE, CAPACITY RECOVERY METHOD, AND SECONDARY BATTERY SYSTEM

• Main Authors: SUGIMASA MASATOSHI, HIROOKA MASAYUKI, ITO SHOTA, SEKI EIJI, MOTOKURA KOHEI, KAWAJI JUN
• Format: Patent
• Language: English; Japanese
• Published: 27.09.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY

To provide a capacity recovery device 350 capable of achieving a long life while suppressing deterioration of a positive electrode material of a secondary battery.SOLUTION: A capacity recovery device 350 comprises: a capacity recovery current control part 506 that performs a capacity recovery of a secondary battery 300 having: a positive electrode terminal 2 connected to a positive electrode; a negative electrode terminal 3 connected to a negative electrode; and a capacity recovery electrode terminal 4 connected to a capacity recovery electrode of moving reactive species to the positive electrode or the negative electrode, by moving the reactive species from the capacity recovery electrode to the positive electrode or the negative electrode; a discharge requirement determination part 510 that determines whether a discharge is performed between the capacity recovery electrode terminal 4 and the positive electrode terminal 2 or the negative electrode terminal 3 after the capacity recovery current control part 506 performs the capacity recovery; and a discharge control part 508 that performs a discharge between the positive electrode terminal 2 or the negative electrode terminal 3 and the capacity recovery electrode terminal 4 in the case where the result of determination by the discharge requirement determination part 510 is positive.SELECTED DRAWING: Figure 3 【課題】二次電池の正極の材料劣化を抑制しながら長寿命化を実現できる容量回復装置３５０を提供する。【解決手段】容量回復装置３５０は、正極に接続された正極端子２と負極に接続された負極端子３と正極または負極に反応種を移動させる容量回復極に接続された容量回復極端子４とを備える二次電池３００の、容量回復極から正極または負極に反応種を移動させることによって、二次電池３００の容量回復を行う容量回復電流制御部５０６と、容量回復電流制御部５０６が容量回復を行った後に、容量回復極端子４と正極端子２または負極端子３との間で放電を行うか否かを判定する放電要否決定部５１０と、放電要否決定部５１０における判定結果が肯定である場合に、正極端子２または負極端子３と容量回復極端子４との間で放電を行う放電制御部５０８と、を備える。【選択図】図３