Battery measuring circuit and battery measuring instrument

• Main Authors: LI LITING, DING YANFANG, LIAO QINQIAN, LEI LILI, SONG SUONA, NONG NINGBO, XU ZITIAN, PANG DONGHUI, HUANG SHIPAN, NI WEICHAO, HUANG MINGYUAN, CHEN SHAOQUAN, FAN SHAOWEI, GAN YIXIU, PAN GUIQUAN, HUANG BINGQIANG, CEN ZONGYUAN, HUANG HUABIN, JIANG NING
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2021
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a battery measuring circuit and a battery measuring instrument. The battery measuring circuit comprises a plurality of branch measuring circuits and a single-chip microcomputer. Any branch measuring circuit comprises an isolation sampling circuit and an analog-to-digital conversion module; the isolation sampling circuit is connected with the analog-to-digital conversion module which is connected with the single-chip microcomputer. The isolation sampling circuit comprises a pre-stage circuit and a post-stage circuit; the pre-stage circuit is provided with an input power supply end, a measurement input end and a grounding end; the post-stage circuit is provided with an output power supply end and the grounding end; the measurement input end of the pre-stage circuit is connected with the positive electrode of a to-be-measured resistance battery unit; the grounding end of the pre-stage circuit is connected with the negative electrode of a to-be-measured resistance battery unit; the input p