STATE DETECTOR, STATE DETECTION METHOD, AND STATE DETECTION SYSTEM

• Main Author: ONDA TORU
• Format: Patent
• Language: English; Japanese
• Published: 11.05.2022
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

To determine deterioration and exhaustion of a secondary battery.SOLUTION: A state detector 1 is a state detector that detects a state of a secondary battery mounted on a vehicle. The state detector includes: measurement means for measuring a current and voltage of the secondary battery; open circuit voltage estimation means for estimating open circuit voltage of the secondary battery on the basis of the voltage measured by the measurement means; internal resistance calculation means for calculating an internal resistance value of the secondary battery on the basis of a measurement result of the measurement means; and determination means for determining deterioration of the secondary battery and exhaustion of the secondary battery using the internal resistance value and the open circuit voltage.SELECTED DRAWING: Figure 1 【課題】二次電池の劣化と上がりを判別する。【解決手段】状態検出装置１は、車両に搭載された二次電池の状態を検出する状態検出装置である。状態検出装置は、二次電池の電流及び電圧を測定する測定手段と、前記測定手段で測定された電圧に基づいて前記二次電池の開回路電圧を推定する開回路電圧推定手段と、前記測定手段の測定結果に基づいて前記二次電池の内部抵抗値を算出する内部抵抗算出手段と、前記内部抵抗値及び前記開回路電圧を用いて前記二次電池の劣化と前記二次電池の上がりを判別する判別手段と、を備える。【選択図】図１