ION DISTRIBUTION STATE ESTIMATION DEVICE FOR ALL-SOLID-STATE BATTERY

• Main Author: MIYAJIMA TAKAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 02.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide an ion distribution state estimation device for an all-solid-state battery that can estimate with high accuracy the state in which ions can be accepted in a negative electrode active material layer.SOLUTION: In an ion distribution state estimation device for an all-solid-state battery, a negative electrode active material layer 25 of a negative electrode includes a plurality of layer components 30 arranged on a straight line L, and each of the layer component is divided into a plurality of parts 31 and 32 according to the position in the direction connecting the center of the layer component and the outer peripheral edge, and the ion distribution state estimation device includes a resistance value estimating unit that estimates the resistance value when ions move between adjacent parts from the outer peripheral edge side to the center side, taking into consideration the elapsed time from a predetermined time of the all-solid-state battery 20, and an acceptance amount estimation unit that estimates the amount of ions that can be accepted by the part 31 located on the outermost edge side of each layer component while taking into account the resistance value.SELECTED DRAWING: Figure 2 【課題】負極活物質層におけるイオンの受け入れ可能状態を高い精度で推定できる全固体電池のイオン分布状態推定装置を提供する。【解決手段】負極の負極活物質層２５が、直線Ｌ上に並んだ複数の層構成部３０を含み、各層構成部が、層構成部の中心と外周縁部とを結ぶ方向の位置に応じて複数の部位３１、３２に分けられ、隣接する部位の間を外周縁部側から中心側へイオンが移動するときの抵抗値を、全固体電池２０の所定時刻からの経過時間を考慮しながら推定する抵抗値推定部と、抵抗値を考慮しながら、各層構成部の最も外周縁部側に位置する部位３１が受け入れ可能なイオン量を推定する受容量推定部と、を備える。【選択図】図２