SYSTEM OF POWER BATTERIES FOR DETERMINING THE IMPEDANCE OF A STAGE

摘要

An accumulator battery system has stages, a power connection, a controller, and circuits. The stages are series-connected. Each has an electrochemical accumulator and a switch. A power connection connects a load to the stages. Each the circuit is associated with a stage. Each circuit generates a voltage variation at terminals of its associated stage, and applies, to a switch of the associated stage, a binary sequence at a frequency. The sequence differs from those of other stages, thus allowing distinguishing between stages based on the sequence. The controller, which is connected to the stages by the power connection, measures a voltage variation across terminals of the stage in response to application of the binary sequence to the stage, identifies a stage from which the variation originates by searching for its associate sequence, and determines, from the variation, an impedance of the identified stage for that frequency.

主权项

1. An apparatus comprising an accumulator battery system, said accumulator battery system comprising stages, an electrical power connection, a control device, and circuits, wherein said stages are connected in series, wherein each of said stages comprises an electrochemical accumulator, wherein each of said stages comprises a switch, wherein said electrical power connection connects an electrical load to said stages, wherein each of said circuits is associated with a stage, wherein each of said circuits is configured to generate a variation in voltage amplitude at terminals of said associated stage, wherein each of said circuits is configured to apply, to a switch of said associated stage, a binary sequence, wherein said binary sequence has a first frequency, wherein said binary sequence is different from binary sequences associated with other stages, whereby said associated stage is distinguishable from other said stages by said binary sequence, wherein said control device is connected to said stages by said electrical power connection, wherein said control device is programmed to measure a voltage variation across terminals of said stage in response to application of said binary sequence to said stage, wherein said control device is programmed to identify a stage from which said voltage variation originates by searching for a binary sequence associated with said stage, and wherein said control device is configured to determine, from said voltage variation, an impedance of said identified stage for said first frequency.