Battery sampling chip and battery management system

A battery sampling chip, comprising:

• a selector module, comprising:
• a first multiplexer and a second multiplexer, the first multiplexer and the second multiplexer being both used to collect status data of a first group of cells;
• an analog-to-digital conversion module, connected with the first multiplexer and the second multiplexer, the analog-to-digital conversion module being used to send a first abnormality feedback instruction to the first multiplexer and the second multiplexer when the status data of the first group of cells respectively collected by the first multiplexer and the second multiplexer are different, and perform analog-to-digital conversion on the status data of the first group of cells when the status data of the first group of cells respectively collected by the first multiplexer and the second multiplexer are the same;
• and
• a data control module, connected with the analog-to-digital conversion module, the data control module being used to receive converted status data sent by the analog-to-digital conversion module, and send alarm information when the converted status data sent by the analog-to-digital conversion module are not received within a preset duration.