Method to charge a battery pack and battery charging circuit to charge a battery pack
AssigneeDatalogic IP Tech S.R.L.
InventorsSandro Codato, Paolo Mazzocato
Life of this patent
Estimating the term…
Abstract
A method to charge a battery pack including a plurality of cells connected in parallel, the method including setting a plurality of set cell charging current, a set cell charging current for each cell of the battery pack; charging the battery back with a total current from a single current source; sensing a plurality of cell currents which flows through each cell of the battery pack; comparing a value proportional to each set cell charging current with a value proportional to the cell current for the same cell; and modulating each cell current on the basis of the comparison for the same cell. A battery charging circuit for a battery pack is also provided.
Claims16
A method for charging a battery pack including a plurality of cells connected in parallel, the method comprising:
- setting a plurality of set cell charging currents, a set cell charging current for each cell of the battery pack;
- charging the battery back with a total current (I) from a single current source;
- sensing a plurality of cell currents which flows through each cell of the battery pack;
- comparing a value proportional to each set cell charging current with a value proportional to the cell current for the same cell;
- and
- modulating each cell current on the basis of the comparison for the same cell.
A battery charging circuit for a battery pack including a plurality of cells connected in parallel and connected to a current source, the battery pack including:
- a sensing element configured to sense a total current provided by the current source;
- a plurality of cell sensing elements configured to sense a cell current flowing through each cell of the plurality;
- a partitioner configured to divide the total current in a number of set cell charging currents equal to the number of cells in the plurality;
- a plurality of comparators, each comparator configured to compare a value proportional to each set cell charging current with a value proportional to the cell current for the same cell;
- and
- a plurality of modulators, each modulator configured to modulate the cell current on the basis of the comparison.
Dependencies are inferred from the claim text.