Large scale battery systems and method of assembly
First Claim
1. A method of constructing a large-scale battery that includes cells and blocks of cells, comprising the steps of:
- attaching an identification designation to each of plural cells for placement within the large-scale battery;
measuring a parameter of the cells;
associating, in a database, each cell with its respective parameter measurement;
calculating a statistical distribution of the parameter of the measured battery cells;
maintaining a database of the identification designations and associated parameters for the cells and blocks;
selecting cells for each block from across the statistical distribution of the parameter; and
placing selected cells in parallel within each block for placement in the large-scale battery according to the statistical distribution.
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Abstract
The methods in this disclosure allow for the identification, selection, and arrangement of cells, blocks, and modules in large scale battery systems, such as electric vehicle battery systems. An example embodiment of the present invention allows for the identification of the cells, blocks, and modules with a unique identifier or associated parameter (e.g., internal resistance contributions or capacity). Additionally, to form a block, cells may be selected from a group of capacity-range sorting bins. Based on a parameter of the cell, a pseudo-number generator may be also be used to select cells from an available inventory of cells as maintained in a cell database based. Cells may also be placed in a block for uniform effective cell impedance and even cell aging while minimizing overall block capacity degradation caused by cycling. Block capacities may also be computed based on a known average temperature gradient during operation.
148 Citations
33 Claims
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1. A method of constructing a large-scale battery that includes cells and blocks of cells, comprising the steps of:
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attaching an identification designation to each of plural cells for placement within the large-scale battery; measuring a parameter of the cells; associating, in a database, each cell with its respective parameter measurement; calculating a statistical distribution of the parameter of the measured battery cells; maintaining a database of the identification designations and associated parameters for the cells and blocks; selecting cells for each block from across the statistical distribution of the parameter; and placing selected cells in parallel within each block for placement in the large-scale battery according to the statistical distribution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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11. A method of selecting cells for construction of a large-scale battery system that includes cells and blocks of cells for placement within the large-scale battery, comprising the steps of:
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measuring at least one parameter of the cells; associating, in a database, each cell with its respective parameter measurement; calculating a statistical distribution of the parameter of the measured cells; selecting cells for each block from across the statistical distribution, of the parameter; and placing selected cells in parallel within each block for placement in the large-scale battery system according to the statistical distribution. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A large-scale battery system that includes, a plurality of electrically-coupled blocks of cells and parallel-connected battery cells within each block, wherein
a parameter of the battery cells in each block follows a statistical distribution of a population of the cells from which the cells are selected, the large-scale battery system being constructed by a method, including the steps of: -
measuring at least one parameter of battery cells for placement within the large-scale battery system; associating, in a database, each battery cell with its respective parameter measurement; calculating a statistical distribution of the parameter of measured battery cells; selecting battery cells, from across the statistical distribution, for placement in the large-scale battery system; and placing selected battery cells in parallel within the battery system according to the statistical distribution. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification