Distributed battery property measurement system

A method of operating a battery management system, the method comprising:

• at least one of powering on or enabling a first sensor coupled to an analog front end (AFE) circuit;
• receiving, from the first sensor, a first value corresponding to a first group of one or more cells in a battery system, wherein the first value is measured while the first sensor is powered on and enabled;
• storing, at the AFE circuit, a representation of the first value;
• at least one of powering off or disabling the first sensor;
• transferring, from the AFE circuit to a host microcontroller, a representation of the stored first value.

An interface circuit for use in a battery management system, the interface circuit comprising:

• a first sensor, configured to measure a first value of a first group of one or more cells in a battery system;
• and
• a first analog front end (AFE) circuit comprising:
• a first pulse-width modulation (PWM) controller, configured to at least one of enable or power on the first sensor while a first PWM signal from the first PWM controller is in a first state, and configured to at least one of disable or power off the first sensor while the first PWM signal is in a second state;
• a first storage register, configured to receive a representation of the first value measured while the first sensor is on and enabled, and configured to store the received first value until another representation of the first value is received;
• and
• wherein the first AFE circuit transfers a representation of a value in the first storage register to a host microcontroller, wherein the transfer occurs over a DC-isolated bus.