PROBLEM TO BE SOLVED: To provide a battery control system capable of accurately estimating the correspondence between negative electrode closed circuit potential and current of a battery with a low arithmetic load.SOLUTION: A battery control system comprises: a battery state estimating unit 51 which calculates estimation values of a plurality of model parameters Rand the like of an equivalent circuit model, positive electrode open circuit potential OCPc, and negative electrode closed circuit potential OCPa; an exchange current arithmetic unit 551 which calculates an estimation value of exchange current iin the battery on the basis of the estimation values of the model parameters; an activated overvoltage calculating unit 552 which estimates the correspondence between current I and activated overvoltage ηof the battery by using the estimation value of the exchange current i; and an estimating unit 556 of negative electrode closed circuit potential which estimates the correspondence between the negative electrode closed circuit potential OCPa and the current I by using the correspondence between the estimation value of the negative electrode open circuit potential OCPa, the current I estimated by the activated overvoltage calculating unit 552, and the activated overvoltage η.SELECTED DRAWING: Figure 2
【課題】バッテリの負極閉回路電位と電流との対応関係を精度良くかつ低い演算負荷で推定できるバッテリ制御システムを提供すること。【解決手段】バッテリ制御システムは、等価回路モデルの複数のモデルパラメータR0等、正極開回路電位OCPc、及び負極開回路電位OCPaの推定値を算出する電池状態推定部51と、モデルパラメータの推定値に基づいてバッテリにおける交換電流i0の推定値を算出する交換電流演算部551と、交換電流i0の推定値を用いることによってバッテリの電流Iと活性化過電圧ηct,aとの対応関係を推定する活性化過電圧算出部552と、負極開回路電位OCPaの推定値と活性化過電圧算出部552によって推定した電流Iと活性化過電圧ηct,aとの対応関係とを用いることにより、負極閉回路電位CCPaと電流Iとの対応関係を推定する負極閉回路電位推定部556と、を備える。【選択図】図2
STATE ESTIMATING DEVICE OF SECONDARY BATTERY AND VEHICLE
二次電池の状態推定装置及び車両
2018-05-31
Patent
Elektronische Ressource
Japanisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
VEHICLE AND METHOD FOR ESTIMATING CHARGED STATE OF SECONDARY BATTERY
Europäisches Patentamt | 2016
|Method of estimating deterioration state of secondary battery and secondary battery system
Europäisches Patentamt | 2021
|DEVICE FOR ESTIMATING STATE OF DEGRADATION OF SECONDARY BATTERY
Europäisches Patentamt | 2019
|Method of estimating deteriorated state of secondary battery and secondary battery system
Europäisches Patentamt | 2022
|METHOD OF ESTIMATING DETERIORATED STATE OF SECONDARY BATTERY AND SECONDARY BATTERY SYSTEM
Europäisches Patentamt | 2020
|