Multi-cell battery charge control
First Claim
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1. An electrochemical battery comprising:
- a stack of individually sealed bipolar wafer cells electrically connected in series, the cells being of a chemistry that generates gas in over charge and/or over discharge, each cell being sealed in an envelope having an area to expand in thickness in response to pressure generated within the respective cell, the expandable area of each envelope being aligned with a corresponding expandable area of at least one adjacent cell and containing a spacer providing the cell with a uniform thickness in an unexpanded state; and
a pressure sensor responsive to a force transmitted through the stack via the expandable areas of the cells, the force to be created by pressure generated in at least one cell in the stack of bipolar cells.
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Abstract
Embodiments of the present invention provide a method and system for controlling a multi-cell battery. In one embodiment of the present invention, a stack of bipolar wafer cells may be connected in series. Each cell may have an area that may be expandable in response to pressure. Such an area may be aligned with a corresponding area of at least one adjacent cell. The invention further includes a trigger mechanism that may be responsive to a force created by pressure generated in a cell in the stack of bipolar cells.
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31 Claims
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1. An electrochemical battery comprising:
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a stack of individually sealed bipolar wafer cells electrically connected in series, the cells being of a chemistry that generates gas in over charge and/or over discharge, each cell being sealed in an envelope having an area to expand in thickness in response to pressure generated within the respective cell, the expandable area of each envelope being aligned with a corresponding expandable area of at least one adjacent cell and containing a spacer providing the cell with a uniform thickness in an unexpanded state; and a pressure sensor responsive to a force transmitted through the stack via the expandable areas of the cells, the force to be created by pressure generated in at least one cell in the stack of bipolar cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification