Connection Scheme for Multiple Battery Cells
First Claim
1. A method for managing performance of a series-parallel battery system, comprising:
- a) forming a battery from m columns and n rows of battery cells connected in a series-parallel configuration, wherein the battery cells in the m columns connected in series between the plus and minus terminals of the battery;
b) forming n−
1 measurement nodes, wherein a positive terminal of the battery cells in each column of a row of battery cells connected to one of said measurement nodes through a buffer resistor, wherein said one of the measurement nodes represents said row;
c) connecting said n−
1 measurement nodes to a battery management unit (BMU), which selects said measurement node to be measured;
d) inserting a control unit in each m columns of battery cells; and
e) measuring, current flow in each m columns with said control unit to adjust current distribution among said m columns.
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Abstract
A series-parallel battery system with a buffer resistor coupled to each junction of batteries or battery cells. Buffer resistors on the same row are coupled to a measurement node. Terminals of the battery system and the measurement nodes are treated as measurement points that are coupled to a conventional battery management unit. The buffer resistors provide a means for limiting in-rush current and a means for maintaining voltage balance across the row of batteries in the parallel columns of batteries. A control unit in series with each series of batteries monitors current in the series and comprises a switch to deactivate the column when the current exceeds a set of predetermined current levels.
4 Citations
7 Claims
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1. A method for managing performance of a series-parallel battery system, comprising:
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a) forming a battery from m columns and n rows of battery cells connected in a series-parallel configuration, wherein the battery cells in the m columns connected in series between the plus and minus terminals of the battery; b) forming n−
1 measurement nodes, wherein a positive terminal of the battery cells in each column of a row of battery cells connected to one of said measurement nodes through a buffer resistor, wherein said one of the measurement nodes represents said row;c) connecting said n−
1 measurement nodes to a battery management unit (BMU), which selects said measurement node to be measured;d) inserting a control unit in each m columns of battery cells; and e) measuring, current flow in each m columns with said control unit to adjust current distribution among said m columns. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification