Power supply system and method for controlling electrochemical cell charging

摘要

An electrical power supply system is provided comprising a number of rechargeable cells, a number of control electronics circuits and a charger which consists of apparatus for producing electricity from a renewable energy source, the electrochemical cells being divided into separate branches connected in parallel to the charger. Each control electronics circuit controls the charging of one branch by measuring a current being applied to the branch, integrating the current measured in the branch, determining a state of charge of the cell or cells of the branch, comparing the integrated current value with a set value set as a function of the determined state of charge, and interrupting the passage of current being applied to the branch when the integrated current reaches the set value. This system makes it possible to optimize the sharing out of charging current between parallel branches of battery cells while being adaptable as regards the number of cells used in parallel in the system.

主权项

1. An electrical power supply system comprising:
a plurality of electrochemical cells, a plurality of control electronics circuits and a charger made up by apparatus for producing electricity from a renewable energy source, the electrochemical cells being divided into at least two branches connected in parallel to the charger, each control electronics circuit being adapted to control the charging of one branch, each control electronics circuit comprising:
a means for measuring current being applied to the branch,a means for integrating the current measured,a means for determining a state of charge of the electrochemical cell or cells of the branch,means for comparing the integrated current value with a set value set as a function of the state of charge determined,means for interrupting the passage of current being applied to the branch when the integrated current reaches the set value,wherein each control electronics circuit adjusts the closure and opening period of said means for interrupting the passage of current in relation to the integrated current value and said set value, wherein said system is configured to supply all branches with current simultaneously.