Method for estimating non-vulnerable remaining battery power based on fractional-order battery model

• Main Authors: XIONG NENG, CHEN YIXING, ZHENG MENGQIAN, ZHU QIAO
• Format: Patent
• Language: Chinese; English
• Published: 06.07.2018
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; 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; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PERFORMING OPERATIONS; PHYSICS; 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

The invention discloses a method for estimating non-vulnerable remaining battery power based on a fractional-order battery model. The method comprises the steps that a fractional-order second-order RCmodel is established; model parameters are recognized by using current and voltage response of a battery pack, and nonlinear functions of open circuit voltage and remaining battery power are obtainedby setting current pulse to remain still after discharging is conducted by the current pulse; a Lipschitz condition and a unilateral Lipschitz condition are proposed aiming at non-linear function parts to ensure that positive effects can be achieved by the non-linear functions on the design of an observer; the practicability of the observer is taken into consideration, and bounded gain disturbance is introduced; a linear matrix inequality system is established and solved by ensuring the H infinite performance of an error system to complete the design of the non-vulnerable observer. Accordingto the established fraction