Method and device for detecting state of charge of lithium ion battery

• Main Authors: LIU LEI, HUANG YUNHUI, SHEN YUE, DENG ZHE, YANG YAN, XIANG JINGWEI
• Format: Patent
• Language: Chinese; English
• Published: 03.11.2020
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a method and device for detecting the state of charge of a lithium ion battery, and belongs to the field of lithium batteries. An ultrasonic pulse signal is applied to the lithium ion battery to be detected to generate ultrasonic waves capable of penetrating through the lithium ion battery, an ultrasonic signal which penetrates through the battery to be detected and then isreflected is collected from one side where the ultrasonic pulse signal is applied; meanwhile, ultrasonic signals penetrating through the to-be-detected battery are collected on the side opposite to the side where the ultrasonic pulse signals are applied, the transmitted ultrasonic signals penetrating through the to-be-detected battery and the reflected ultrasonic signals are comprehensively collected, and the ultrasonic signals carrying the state of charge of the to-be-detected battery are collected as much as possible; and the ultrasonic signal is processed to achieve detection of the stateof charge of the lithium b