Apparatus, system and method for charge balancing of individual batteries in a string of batteries using battery voltage and temperature, and detecting and preventing thermal runaway

摘要

Implementations of the present disclosure involve a system and method for load balancing a string of jars. The temperature and voltage of each jar is measured and a target voltage for the jar is set based on the measured temperature. A current is supplied to the jar in order to maintain, increase, or decrease the jar's voltage.

主权项

1. A method of load balancing comprising:
measuring a first voltage and a first temperature of a first battery in a string of batteries; measuring a second voltage and a second temperature of a second battery in the string of batteries; setting a first target voltage based on a first nominal battery voltage associated with the first temperature; setting a second target voltage based on a second nominal battery voltage associated with the second temperature; controlling a first current to the first battery to:
maintain the first voltage when the first voltage is at the first target voltage;increase the first voltage when the first voltage is below the first target voltage; anddecrease the first voltage when the first voltage is above the first target voltage; and controlling a second current to the second battery to:
maintain the second voltage when the second voltage is at the second target voltage;increase the second voltage when the second voltage is below the second target voltage; anddecrease the second voltage when the second voltage is above the second target voltage.