BATTERY SYSTEM

• Main Author: TSUJIKO AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 07.01.2021
• 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 return Li ions from a non-opposite region to an opposite region while suppressing deterioration of negative electrode active material.SOLUTION: A battery system includes a Li ion battery and a control device. The Li ion battery includes a positive electrode and a negative electrode. The negative electrode includes an opposite region and a non-opposite region. The opposite region faces the positive electrode. The non-opposite region does not face the positive electrode. Each of the opposite region and the non-opposite region includes first negative electrode active material and second negative electrode active material. The first negative electrode active material has first charging/discharging potential (P1). The second negative electrode active material has second charging/discharging potential (P2). The first charging/discharging potential (P1) is higher than the second charging/discharging potential (P2). The control device controls voltage of the Li ion battery so that the negative electrode is kept to have intermediate potential (Pm). The intermediate potential (Pm) is higher than the second charging/discharging potential (P2) and lower than the first charging/discharging potential (P1)SELECTED DRAWING: Figure 5 【課題】負極活物質の劣化を抑制しつつ、非対向領域から対向領域へＬｉイオンを戻すこと。【解決手段】電池システムは、リチウムイオン電池、および制御装置を含む。リチウムイオン電池は、正極および負極を含む。負極は、対向領域および非対向領域を含む。対向領域は、正極と対向している。非対向領域は、正極と対向していない。対向領域および非対向領域の各々は、第１負極活物質および第２負極活物質を含む。第１負極活物質は、第１充放電電位（Ｐ１）を有する。第２負極活物質は、第２充放電電位（Ｐ２）を有する。第１充放電電位（Ｐ１）は、第２充放電電位（Ｐ２）より高い。制御装置は、負極が中間電位（Ｐｍ）を維持するように、リチウムイオン電池の電圧を制御する。中間電位（Ｐｍ）は、第２充放電電位（Ｐ２）より高く、かつ第１充放電電位（Ｐ１）より低い。【選択図】図５