Battery pack assembly method
AssigneeROLLS-ROYCE plc
InventorTimothy D. BINGHAM
Life of this patent
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Abstract
A method of assembling a battery pack from a plurality of battery cells of a same type is provided. The method may account for normal variation in the DC internal resistance of the cells and thereby improve the battery pack's performance. The method comprises: identifying a design for at least a portion of a battery pack, wherein the portion includes a plurality of battery cells and the design defines, for each of the plurality of cells, a cell position within the portion of the battery pack; obtaining a thermal model for the portion of the battery pack.
Claims20
A method of assembling a battery pack from a plurality of battery cells of a same type, the method comprising:
- identifying a design for at least a portion of a battery pack, wherein the portion includes a plurality of battery cells and the design defines, for each of the plurality of cells, a cell position within the portion of the battery pack;
- obtaining a thermal model for the portion of the battery pack, the thermal model including, for each of the plurality of cell positions, a measure of a cooling capability associated with the cell position;
- obtaining a plurality of battery cells of the same type;
- obtaining, for each of the obtained battery cells, an indication of at least one measured property of the cell, the at least one measured property of the cell including a DC internal resistance of the cell;
- for a plurality of the cell positions, allocating one of the obtained cells to the cell position based at least in part on the thermal model and the DC internal resistances of the cells;
- and
- assembling the portion of the battery pack in accordance with the design and the allocations of the obtained cells.
A non-transitory computer-readable medium having computer program code stored thereon which, when executed by a computer, causes the computer to:
- receive a first input comprising a thermal model of at least a portion of a battery back, the thermal model including, for each of a plurality of battery cell positions of the portion of the battery pack, a measure of a cooling capability associated with the cell position;
- receive a second input comprising, for each of a plurality of battery cells, an indication of at least one measured property of the cell, the at least one measured property including a DC internal resistance of the cell;
- determine, for each of the cell positions of the thermal model, and based at least in part on the thermal model and the indications of the at least one measured property of the cells, a cell to cell position allocation;
- and
- output the cell allocations.
Dependencies are inferred from the claim text.