Large scale battery systems and method of assembly
First Claim
1. A method of identifying components of a large scale battery, comprising:
- attaching an identification designation to each of plural cells included within the large scale battery;
attaching an identification designation to each of plural blocks of cells included within the large scale battery;
maintaining a database of the identification designations and associated parameters for the cells and blocks; and
selecting cells and blocks based on the associated parameters.
1 Assignment
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Accused Products
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.
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Citations
37 Claims
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1. A method of identifying components of a large scale battery, comprising:
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attaching an identification designation to each of plural cells included within the large scale battery; attaching an identification designation to each of plural blocks of cells included within the large scale battery; maintaining a database of the identification designations and associated parameters for the cells and blocks; and selecting cells and blocks based on the associated parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of selecting cells for construction of a battery system, comprising:
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measuring capacity of battery cells; associating, in a database, each battery cell with its respective capacity measurement; calculating a statistical distribution of the capacity of measured battery cells; selecting battery cells, from across the statistical distribution, for placement in the battery system; and placing selected battery cells in parallel within the battery system. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A battery system comprising:
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a plurality of electrically coupled blocks of battery cells, including parallel connected battery cells within each block; and capacity of the battery cells in each block following a statistical distribution of a population of the battery cells from which the battery cells are selected. - View Dependent Claims (17, 18, 19, 20)
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21. A method of selecting cells for a battery system, comprising:
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measuring internal resistance for components of the battery system; maintaining a database that includes internal resistance measurements; and placing cells in the battery system based on the internal resistance measurements. - View Dependent Claims (22, 23, 24, 25)
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26. A battery system comprising:
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a plurality of electrically coupled blocks of plural battery cells, including parallel connected battery cells within each block; and in each block, battery cells having a low internal resistance are placed in areas of high internal resistance contributed from other components of the battery system relative to battery terminals. - View Dependent Claims (27)
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28. A method of selecting desired capacities for components of a battery system, comprising:
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determining a temperature profile within the battery system; estimating a temperature dependent capacity of components of the battery system; and selecting components of the battery system using the temperature dependent capacities and temperature profile. - View Dependent Claims (29)
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30. A battery system comprising:
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a plurality of electrically coupled battery system components; and battery system components having low capacity are selected to be placed farthest away from a heat source. - View Dependent Claims (31, 32)
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33. A method of identifying components of a large scale battery, comprising:
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attaching an identification designation to each of plural cells included within the large scale battery; attaching an identification designation to each of plural blocks of cells included within the large scale battery; attaching an identification designation to each of plural modules of blocks included within the large scale battery; and maintaining a database of the identification designations and associated parameters for the cells, blocks, and modules. - View Dependent Claims (34, 35, 36, 37)
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Specification