BATTERY CONTROLLER

• Main Authors: UEDA KENJI, NONOMURA TOMOMI, MATSUI HIROHITO
• Format: Patent
• Language: English; Japanese
• Published: 18.08.2016
• 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

PROBLEM TO BE SOLVED: To estimate concentration distribution of lithium ions generated accompanying an overdischarge state or overcharge state in a lithium ion secondary battery.SOLUTION: A battery controller 41 for a secondary battery 10 including stacked electrodes comprises a battery control unit 40. The secondary battery 10 has a plurality of heat flux sensors S1 to S3 that detect a heat flux from the secondary battery 10 to the outside of the secondary battery 10 and are provided on at least one of the secondary battery 10's two faces in parallel with the electrodes' stacking direction. The battery control unit 40 calculates the secondary battery 10's heat generation distribution on the basis of detection values of the plurality of heat flux sensors S1 to S3 to estimate lithium ion concentration distribution at the electrodes on the basis of a result of the calculation.SELECTED DRAWING: Figure 4 【課題】リチウムイオン二次電池において放電過多状態又は充電過多状態に伴い生じるリチウムイオン濃度分布を推定する。【解決手段】積層された電極を含む二次電池１０の電池制御装置４１であって、二次電池１０には、二次電池１０から二次電池１０の外部に向かう熱流束を検出する複数の熱流束センサＳ１〜Ｓ３が、電極の積層方向に平行な二次電池１０の２面のうち少なくとも１面に設けられ、複数の熱流束センサＳ１〜Ｓ３の検出値に基づいて、二次電池１０の発熱分布を算出し、その算出結果に基づいて、電極におけるリチウムイオン濃度分布を推定する電池制御部４０を備える。【選択図】 図４