BATTERY MODULE

To provide a battery module capable of appropriately suppressing high-rate deterioration of a secondary battery and then maintaining charge efficiency equal to or higher than a fixed level.SOLUTION: A battery module 1 comprises: a battery device 100 including a secondary battery 110 in which an electrode body and an electrolyte are accommodated in a battery case; and a control apparatus 200 which controls charge/discharge of the battery device 100. The control apparatus 200 includes: increase amount measurement means 210 which measures an increase amount LΔ of an excessive electrolyte of the secondary battery 110 during charge; and current value correction means 220 which implements current correction control for correcting a current value of a charging current to the battery device 100 based on the increase amount LΔ of the excessive electrolyte. Thus, charging can be continued while correcting the current value in accordance with a degree of high-rate deterioration, thereby appropriately suppressing the high-rate deterioration of the secondary battery and then maintaining charge efficiency equal to or higher than a fixed level.SELECTED DRAWING: Figure 1 【課題】二次電池のハイレート劣化を適切に抑制した上で、一定以上の充電効率を維持できる電池モジュールを提供する。【解決手段】ここに開示される電池モジュール１は、電池ケース内に電極体と電解液が収容された二次電池１１０を含む電池デバイス１００と、電池デバイス１００の充放電を制御する制御装置２００とを備えている。そして、制御装置２００は、充電中の二次電池１１０の余剰電解液の増加量ＬΔを測定する増加量測定手段２１０と、余剰電解液の増加量ＬΔに基づいて電池デバイス１００に対する充電電流の電流値を補正する電流補正制御を実施する電流値補正手段２２０とを含む。これによって、ハイレート劣化の程度に応じて電流値を補正しながら充電を継続することができるため、二次電池のハイレート劣化を適切に抑制した上で、一定以上の充電効率を維持することができる。【選択図】図１