Battery monitoring circuit

摘要

A battery monitoring circuit is described. The battery monitoring circuit includes a high counter that increments when a sense voltage measurement is above a threshold. The battery monitoring circuit also includes a low counter that increments when the sense voltage measurement is below the threshold. The battery monitoring circuit further includes state machine circuitry coupled to the high counter and to the low counter. The battery monitoring circuit additionally includes open circuit voltage monitoring circuitry coupled to the state machine circuitry. The battery monitoring circuit also includes resistance monitoring circuitry coupled to the state machine circuitry.

主权项

1. A battery monitoring circuit, comprising:
a high counter that increments when a sense voltage measurement is above a threshold; a low counter that increments when the sense voltage measurement is below the threshold; state machine circuitry coupled to the high counter and to the low counter; open circuit voltage monitoring circuitry coupled to the state machine circuitry; and resistance monitoring circuitry coupled to the state machine circuitry; wherein the state machine circuitry transitions from a low-load state to a high-load state when the high counter reaches a first high counter limit; and wherein the state machine circuitry transitions from the high-load state to the low-load state when the low counter reaches a second low counter limit.