Method and Apparatus for Electrically Cycling a Battery Cell to Simulate an Internal Short
First Claim
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1. A battery pack short simulation testing system, comprising:
- a plurality of cells, wherein at least one of said plurality of cells is preselected as a test cell, wherein said plurality of cells correspond to said test cell and at least one non-test cell, and wherein said test cell is not electrically connected to said non-test cells;
a pair of test leads electrically connected to a pair of terminals corresponding to said test cell;
a power supply electrically connected to said test cell via said pair of test leads, wherein said power supply is not electrically connected to said non-test cells; and
a power supply controller coupled to said power supply, wherein said power supply controller is configured to cycle said power supply at a preset frequency and to supply said test cell with a preset current level.
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Abstract
A test apparatus and corresponding method for simulating an internal cell short and initiating thermal runaway in a battery cell is disclosed whereby the cell is internally heated through rapid charge and discharge cycles at high currents. The magnitude of the selected current may be modulated to simulate a cell short with the desired power profile without unrealistically heating neighboring cells or interfering with the thermal environment of the cell within the module.
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Citations
23 Claims
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1. A battery pack short simulation testing system, comprising:
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a plurality of cells, wherein at least one of said plurality of cells is preselected as a test cell, wherein said plurality of cells correspond to said test cell and at least one non-test cell, and wherein said test cell is not electrically connected to said non-test cells; a pair of test leads electrically connected to a pair of terminals corresponding to said test cell; a power supply electrically connected to said test cell via said pair of test leads, wherein said power supply is not electrically connected to said non-test cells; and a power supply controller coupled to said power supply, wherein said power supply controller is configured to cycle said power supply at a preset frequency and to supply said test cell with a preset current level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of simulating a short within at least one test cell of a plurality of cells, wherein said plurality of cells correspond to said at least one test cell and at least one non-test cell, said method comprising the steps of:
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breaking any electrical connection between said at least one test cell and said at least one non-test cell; electrically coupling a power supply to said at least one test cell; and cycling said power supply at a preset frequency, wherein said power supply provides power to said at least one test cell at a preset current to simulate said short. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification