System for Power Balance Monitoring in Batteries

摘要

A system for power balance monitoring in an energy storage battery comprising a plurality of energy modules connected in a series-parallel configuration. The energy storage module comprises a plurality of cells. Each module is a three-terminal module. The three terminals comprise a positive output terminal and a negative output terminal for connecting the modules in a series string to a load and an energy sharing terminal for sharing energy between modules is other battery strings. A module power management sub-system comprising a current monitoring circuit is connected to each of the energy sharing terminals. Each module power management sub-system is in communication with a battery power management sub-system so that a weak module can be detected based on module current output. Advantageously, the module power management sub-system is not connected across the main power pathway of the module and so does not appreciably increase module impedance.

主权项

1. A system for power balance monitoring in an energy storage battery comprising multiple strings of a plurality of three terminal energy storage modules in a series and parallel configuration:
a. Wherein each of said plurality of three terminal energy storage modules can he serially connected into a battery string by means of a negative output terminal and a positive output terminal for connecting a main power pathway to a load and an energy sharing terminal for connecting to modules or other battery strings modules; and, b. Wherein said energy sharing terminal includes an energy storage module power management sub-system comprising a voltage monitor, a current monitoring circuit, a temperature monitor and means for balancing said plurality of serially connected energy storage cells; and, c. Wherein a battery power management sub-system receives current data. from said energy storage module current monitoring circuit so that a weak energy storage module can be identified.