BATTERY CHARACTERISTIC DETERMINATION DEVICE AND SECONDARY BATTERY SYSTEM

• Main Authors: SUGIMASA MASATOSHI, HIROOKA MASAYUKI, ITO SHOTA, SEKI EIJI, MOTOKURA KOHEI, KAWAJI JUN
• Format: Patent
• Language: English; Japanese
• Published: 16.09.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TESTING

To provide a battery characteristic determination device capable of accurately determining battery characteristics even when capacity recovery is performed.SOLUTION: Disclosed is a battery characteristic determination device for determining battery characteristics, which changes with deterioration, of a lithium-ion secondary battery including a positive electrode, a negative electrode, and a third pole for replenishing lithium ions to at least one of the positive electrode and the negative electrode. This device includes a parameter updating part 52 which updates a determination parameter for determining the battery characteristics of the lithium-ion secondary battery when capacity recovery is performed by the replenishment of the lithium ions to the electrode.SELECTED DRAWING: Figure 4 【課題】容量回復を行ったときでも精度よく電池特性を決定可能な電池特性決定装置を提供する。【解決手段】正極と、負極と、前記正極又は前記負極の少なくとも一方の電極にリチウムイオンを補充する第三極とを備えるリチウムイオン二次電池の、劣化に伴って変化する電池特性を決定する電池特性決定装置であって、前記リチウムイオン二次電池の前記電池特性を決定する決定パラメータを、前記電極への前記リチウムイオンの補充による容量回復の際に更新するパラメータ更新部５２を備える。【選択図】図４