Elastic plates and battery cell assemblies including same
First Claim
1. A battery stack comprisinga first cell,a second cell positioned adjacent the first cell in a stacked arrangement with the first cell, the first and second cells each includinga cell housing,a positive electrode, anda negative electrode,the positive electrode and the negative electrode sealed within the cell housing along with an electrolyte, andan elastic member disposed between the first cell and the second cell, the elastic member comprisinga plate that generally resides within a plane and hasa first side,a second side opposed to the first side,corrugations that provide ridges that reside in the plane and grooves that alternate with the ridges, each groove includingan array of first protruding regions where each first protruding region protrudes outwardly from the first side and coincides with a depression formed in the second side, each first protruding region being offset from the plane on the first side of the plate, each first protruding region extending across an entire width of the groove,an array of second protruding regions where each second protruding region protrudes outwardly from the second side and coincides with a depression formed in the first side, each second protruding region being offset from the plane on the second side of the plate, each second protruding region extending across the entire width of the groove, andelongated openings that extend across the entire width of the groove,whereineach ridge is free of the first protruding regions and the second protruding regions.
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Accused Products
Abstract
A battery pack includes a battery housing and electrochemical cells disposed in the battery housing in a stacked configuration. Elastic members are disposed between adjacent cells of a cell stack. Each elastic members is formed as a plate (e.g., a single-thickness sheet) having a curved or wavy contour when seen in cross-section, and is configured to serve as a compression spring that provides a predetermined compression force to adjacent cells while accommodating cell growth during use. The elastic members may include surface features such as strategically shaped and/or located protrusions that are configured to permit compliance and can be tuned to address the requirements of a specific application and permit application of varying stiffness characteristics across a surface of a cell.
12 Citations
12 Claims
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1. A battery stack comprising
a first cell, a second cell positioned adjacent the first cell in a stacked arrangement with the first cell, the first and second cells each including a cell housing, a positive electrode, and a negative electrode, the positive electrode and the negative electrode sealed within the cell housing along with an electrolyte, and an elastic member disposed between the first cell and the second cell, the elastic member comprising a plate that generally resides within a plane and has a first side, a second side opposed to the first side, corrugations that provide ridges that reside in the plane and grooves that alternate with the ridges, each groove including an array of first protruding regions where each first protruding region protrudes outwardly from the first side and coincides with a depression formed in the second side, each first protruding region being offset from the plane on the first side of the plate, each first protruding region extending across an entire width of the groove, an array of second protruding regions where each second protruding region protrudes outwardly from the second side and coincides with a depression formed in the first side, each second protruding region being offset from the plane on the second side of the plate, each second protruding region extending across the entire width of the groove, and elongated openings that extend across the entire width of the groove, wherein each ridge is free of the first protruding regions and the second protruding regions.
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7. A battery module comprising
a cell support element; -
a first cell supported on the cell support element, a second cell supported on the cell support element, the second cell positioned adjacent the first cell in a stacked arrangement with the first cell, the first and second cells each including a cell housing, a positive electrode, and a negative electrode, the positive electrode and the negative electrode sealed within the cell housing along with an electrolyte, and an elastic member disposed between the first cell and the second cell, the elastic member comprising a plate that generally resides within a plane and has a first side, a second side opposed to the first side, corrugations that provide ridges that reside in the plane and grooves that alternate with the ridges, each groove including an array of first protruding regions where each first protruding region protrudes outwardly from the first side and coincides with a depression formed in the second side, each first protruding region being offset from the plane on the first side of the plate, each first protruding region extending across an entire width of the groove, an array of second protruding regions where each second protruding region protrudes outwardly from the second side and coincides with a depression formed in the first side, each second protruding region being offset from the plane on the second side of the plate, each second protruding region extending across the entire width of the groove, and elongated openings that extend across the entire width of the groove, wherein each ridge is free of the first protruding regions and the second protruding regions. - View Dependent Claims (8, 9)
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10. A battery pack comprising
a battery pack housing; -
a first cell disposed in the housing, a second cell disposed in the housing, the second cell positioned adjacent the first cell in a stacked arrangement, the first and second cells each including a cell housing, a positive electrode, and a negative electrode, the positive electrode and the negative electrode sealed within the cell housing along with an electrolyte, and an elastic member disposed between the first cell and the second cell, the elastic member comprising a plate that generally resides within a plane and has a first side, a second side opposed to the first side, corrugations that provide ridges that reside in the plane and grooves that alternate with the ridges, each groove including an array of first protruding regions where each first protruding region protrudes outwardly from the first side and coincides with a depression formed in the second side, each first protruding region being offset from the plane on the first side of the plate, each first protruding region extending across an entire width of the groove, an array of second protruding regions where each second protruding region protrudes outwardly from the second side and coincides with a depression formed in the first side, each second protruding region being offset from the plane on the second side of the plate, each second protruding region extending across the entire width of the groove, and elongated openings that extend across the entire width of the groove, wherein each ridge is free of the first protruding regions and the second protruding regions. - View Dependent Claims (11, 12)
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Specification
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- Resources
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Current AssigneeBosch Battery Systems, LLC, Robert Bosch GmbH, Robert Bosch Battery Systems GmbH (Samsung SDI Company Limited)
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Original AssigneeRobert Bosch Battery Systems GmbH (Samsung SDI Company Limited)
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InventorsKarditsas, Nick, Kotik, Mark
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Primary Examiner(s)Carrico, Robert S
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Application NumberUS14/873,269Publication NumberTime in Patent Office1,383 DaysField of SearchUS Class CurrentCPC Class CodesH01M 10/0468 Compression means for stack...H01M 10/0481 Compression means other tha...H01M 10/052 Li-accumulatorsH01M 2220/20 Batteries in motive systems...H01M 50/211 adapted for pouch cellsH01M 50/213 adapted for cells having cu...H01M 50/291 characterised by their shapeY02E 60/10 Energy storage using batteriesY02P 70/50 Manufacturing or production...
