Thermal Interface and Thermal Management System for Battery Cells
First Claim
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2. A battery assembly comprising:
- a plurality of battery cells, each battery cell including a positive terminal at a first end of the battery cell and a negative terminal at a second end of the battery cell, the second end opposite to the first end;
a heat spreader formed of a thermally conductive material; and
a thermal interface positioned between the second ends of the battery cells and the heat spreader, the thermal interface comprising a single layer of a material that thermally couples the second ends of the battery cells to the heat spreader.
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Abstract
A battery housing includes a heat spreader, a thermal interface that contacts a surface of the heat spreader, and a battery frame that is configured to hold a plurality of battery cells. When a battery cell is inserted into the battery frame, the thermal interface contacts the cell at the same end as the cell'"'"'s negative terminal. As a result, the thermal interface allows heat to be transferred between the battery cell and the heat spreader. It is advantageous to make a thermal connection at the end with the negative terminal because the internal jelly roll structure of the battery cell causes the cell to have a higher thermal conductivity at its negative terminal.
14 Citations
18 Claims
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2. A battery assembly comprising:
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a plurality of battery cells, each battery cell including a positive terminal at a first end of the battery cell and a negative terminal at a second end of the battery cell, the second end opposite to the first end; a heat spreader formed of a thermally conductive material; and a thermal interface positioned between the second ends of the battery cells and the heat spreader, the thermal interface comprising a single layer of a material that thermally couples the second ends of the battery cells to the heat spreader. - View Dependent Claims (1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17)
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15-1. The battery assembly of claim 2, wherein the battery cells are hexagonally packed.
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18. A battery assembly comprising:
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a battery means having a negative terminal means; a means for spreading heat; and a thermal interface means positioned between the negative terminal means and the heat spreading means, the thermal interface means for thermally coupling the negative terminal means to the heat spreading means.
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Specification