STORAGE BATTERY CONTROL DEVICE AND CONTROL METHOD

• Main Authors: SAKABE HIROSHI, OKAWA KEIICHIRO, NAKAO RYOHEI, KOMATSU DAIKI, MATE FANY, YAMAUCHI SUSUMU
• Format: Patent
• Language: English; Japanese
• Published: 28.02.2024
• 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 solve a problem of deterioration in accuracy of a SOHQ due to various error factors such as an OCV estimation error though a method is known for calculating a full charge capacity from a SOCv at two points and therebetween by a current integrated value in a SOHQ calculation method.SOLUTION: A battery control device includes: a SOHQ calculation unit configured to calculate a SOHQ on the basis of a value including a current value and/or a voltage value of a battery; a threshold value determination unit configured to determine a SOHQ threshold value on the basis of internal resistance of the battery; and a SOHQ determination unit configured to determine a SOHQ on the basis of comparison between the SOHQ and the SOHQ threshold value by the SOHQ calculation unit.SELECTED DRAWING: Figure 3 【課題】ＳＯＨＱ演算方法において、２点のＳＯＣｖとその間での電流積算値により満充電容量を算出する方法が知られているが、ＯＣＶ推定誤差等の多様な誤差要因によりＳＯＨＱの精度が低下してしまう課題がある。【解決手段】電池の電流値及び／又は電圧値を含む値に基づいてＳＯＨＱを演算するＳＯＨＱ演算部と、前記電池の内部抵抗に基づいてＳＯＨＱ閾値を決定する閾値決定部と、前記ＳＯＨＱ演算部による前記ＳＯＨＱと前記ＳＯＨＱ閾値との比較に基づいてＳＯＨＱを決定するＳＯＨＱ決定部と、を備える電池制御装置。【選択図】図３