Method for verifying smart battery failures by measuring input charging voltage and associated systems

A battery utilizing input charging voltages to verify charging failures, comprising:

• positive and negative input terminals;
• a cell pack coupled to drive the positive and negative input terminals;
• a battery management unit (BMU), including a microcontroller and analog front end (AFE) circuitry;
• a charge transistor (C-FET) coupled between the positive input terminal and the cell pack and coupled to be controlled by the BMU;
• a discharge transistor (D-FET) coupled between the positive input terminal and the cell pack and coupled to be controlled by the BMU;
• a current sense resistor coupled between the negative input terminal and the cell pack;
• a current input analog-to-digital converter (ADC) coupled to the current sense resistor;
• and
• a voltage input analog-to-digital converter (ADC) coupled to the positive and negative input terminals;
• wherein the BMU is configured to utilize charging voltage values from the voltage input ADC to verify charging failures.

An information handling system configured to be powered by a battery or an alternating current to direct current (AC/DC) converter, comprising:

• an alternating current to direct current (AC/DC) converter;
• a load coupled to the AC/DC converter, the load representing powered circuitry for an information handling system;
• a charger coupled to the AC/DC converter;
• a battery coupled to the charger and to the load, the battery comprising:
• positive and negative input terminals;
• a cell pack coupled to drive the positive and negative input terminals;
• a battery management unit (BMU), including a microcontroller and analog front end (AFE) circuitry;
• a charge transistor coupled (C-FET_between the positive input terminal and the cell pack and coupled to be controlled by the BMU;
• a discharge transistor coupled (D-FET) between the positive input terminal and the cell pack and coupled to be controlled by the BMU;
• a current sense resistor coupled between the negative input terminal and the cell pack;
• a current input analog-to-digital converter (ADC) coupled to the resistor;
• and
• a voltage input analog-to-digital converter (ADC) coupled to the positive and negative input terminals;
• wherein the BMU is configured to utilize charging voltage values from the voltage input ADC to verify charging failures.