Balancing Discharge in Parallel Battery Configurations

An apparatus, not connected to any other battery source, to balance a discharge in parallel battery configuration comprising:

• a battery pack (a) having a first battery system and a second battery system in parallel configuration, a pulse width modulation device, and a computer processing unit, and (b) being interconnectable to a load;
• the first battery system and the second battery system each has, in series and in order, a first voltage sensor, a resistor, a second voltage sensor, a string of battery cells that generates a current, and a switching device;
• the first voltage sensor, in each battery system, measures an electrical current's voltage prior to the electrical current passing through the resistor, and the second voltage sensor, in each battery system, measures the electrical current's voltage after the electrical current passes through the resistor;
• the first and second voltage measurements from the first and second voltage sensors in each battery system are transmitted to the computer processing unit;
• the computer processing unit calculates the voltage drop for each battery system;
• based on the voltage drop calculations, the computer processing unit transmits a signal to the pulse width modulation device to transmit a distinct signal to each switching device in each battery system that alters or maintains the pulse width modulation applied to each switching device in each battery system, to thereby effectively balance the electrical current discharge from each battery system;
• and
• is not connected to any other battery source.

The method of using an apparatus, not connected to any other battery source, to balance a discharge in parallel battery configuration, the apparatus having:

• a battery pack (a) having a first battery system and a second battery system in parallel configuration, a pulse width modulation device, and a computer processing unit and (b) being interconnectable to a load;
• the first battery system and the second battery system each has, in series and in order, a first voltage sensor, a resistor, a second voltage sensor, a string of battery cells that generates a current, and a switching device;
• measuring through the first voltage sensor, in each battery system, an electrical current's voltage prior to the electrical current passing through the resistor;
• measuring through the second voltage sensor, in each battery system, the electrical current's voltage after the electrical current passes through the resistor;
• calculating the voltage drop for each battery system through the first and second voltage measurements from the first and second voltage sensors in each battery system;
• altering or maintaining, based on the voltage drop calculation for each battery system, the pulse width modulation applied to each individual switching device in each battery system to effectively balance the electrical current discharge from every battery system.