SECONDARY BATTERY RESIDUAL CAPACITY CALCULATION DEVICE

• Main Author: MORI SHIGENORI
• Format: Patent
• Language: English; Japanese
• Published: 05.11.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PERFORMING OPERATIONS; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING; TRANSPORTING; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To provide a secondary battery residual capacity calculation device that can improve estimation accuracy of residual capacity by reducing an influence of the polarization of a secondary battery even in a case of a long-range travel by electricity supply from the secondary battery.SOLUTION: EVECU 6 includes: using an estimation SOC as it is (S7) if the estimation SOC deviates from a corrected SOC slightly (S6:YES); using a corrected SOC utilizing an electric power consumption calculated by an inverter control, a DC/DC converter control and an electrically-driven compressor control if the deviation is large (S6:NO). This can reduce the influence of the polarization of a secondary battery 2 according to a travel state, thus increasing an EV travel distance. 【課題】二次電池からの電力供給で長距離走行した場合であっても、二次電池の分極の影響を低減して残存容量の推定精度を高めることができる二次電池残存容量算出装置を提供する。【解決手段】ＥＶＥＣＵ６は、推定ＳＯＣと補正ＳＯＣとの乖離が小さい場合は（Ｓ６：ＹＥＳ）、推定ＳＯＣをそのまま使用し（Ｓ７）、乖離が大きい場合は（Ｓ６：ＮＯ）、インバータ制御、ＤＣ／ＤＣコンバータ制御、電動コンプレッサ制御で演算される電力消費量を利用した補正ＳＯＣを使用する。これにより、走行状態に応じて二次電池２の分極の影響を低減することができ、ＥＶ走行距離を伸ばすことができる。【選択図】図５