High current battery charging using ir dropout compensation

A method for charging a lithium-ion battery, comprising:

• sensing a battery voltage via a Kelvin sense at positive and negative terminals at the battery;
• comparing the sensed battery voltage value with a desired battery top off voltage value;
• and
• terminating charging if the battery voltage exceeds the desired battery top off value;
• and
• continuing charging if the battery voltage does not exceed the desired battery top off value.

An apparatus for charging a lithium-ion battery, comprising:

• a battery field effect transistor;
• a switch mode battery charger;
• a comparator;
• a battery management system;
• a multiplier;
• and
• a processor.

An apparatus for charging a lithium-ion battery, comprising:

• means for measuring a battery current value;
• means for multiplying the battery current value by an effective resistance of the battery to produce an effective dropout voltage value;
• means for comparing the effective battery voltage value with a desired battery top off voltage value;
• means for adjusting a switch mode battery charger output set point based on a setpoint voltage;
• means for comparing battery current and terminal current;
• and
• means for terminating charging if the battery current is less than the terminal current and measuring the battery current value again if the battery current is greater than the terminal current.

An apparatus for charging a lithium-ion battery, comprising:

• means for sensing a battery voltage via a Kelvin sense at positive and negative terminals at the battery;
• means for comparing the sensed battery voltage value with a desired battery top off voltage value;
• means for terminating charging if the battery voltage exceeds the desired battery top of value;
• and
• means for continuing charging if the battery voltage does not exceed the desired battery top off value.

A non-transitory computer-readable medium, containing instructions for causing a processor to perform the steps of:

• measuring a battery field current value;
• multiplying the battery current value by an effective resistance of the battery to produce an effective dropout voltage value;
• comparing the effective battery voltage value with a desired battery top off voltage value;
• and
• adjusting a switch mode battery charger output setpoint based on a setpoint voltage;
• comparing battery current and terminal current;
• and
• terminating battery charging if battery current is less than terminal current and measuring the battery current value again if the battery current is greater than the terminal current.

A non-transitory computer-readable medium for causing a processor to perform the steps of:

• sensing a battery voltage via a Kelvin sense at positive and negative terminals at the battery;
• comparing the sensed battery voltage value with a desired battery top off voltage value;
• terminating charging if the battery voltage exceeds the desired battery top off value;
• and
• continuing charging if the battery voltage does not exceed the desired battery top off value.