Testing methods and pass/fail criteria for electric joints
First Claim
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1. A method of evaluating a battery module, comprising:
- applying a tension load to a joint of the battery module, the joint including a segment of a battery terminal connected to a segment of an interconnector busbar; and
measuring electrical resistance across the segments of the joint.
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Abstract
In one embodiment, a method of evaluating a battery module includes: applying a tension load to a test coupon, the test coupon including a segment of a battery terminal connected to a segment of an interconnector busbar; and measuring electrical resistance across the segments of the test coupon. In certain instances, the method further includes applying a different, second tension load to the segments of the test coupon and repeating the measuring of electrical resistance. In certain other instances, the method further includes forming a plot between various values of electrical resistance as a function of various tension loads.
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Citations
20 Claims
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1. A method of evaluating a battery module, comprising:
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applying a tension load to a joint of the battery module, the joint including a segment of a battery terminal connected to a segment of an interconnector busbar; and measuring electrical resistance across the segments of the joint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of evaluating a battery module, comprising:
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applying a number of tension loads to a test coupon representing a joint of the battery module, the test coupon including a segment of a battery terminal connected to a segment of an interconnector busbar; measuring a number of electrical resistance values across the segments of the test coupon in response to the number of tension loads applied; and forming a plot between the electrical resistance values as a function of tension loads. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method of evaluating a battery module, comprising:
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applying a number of tension loads to a test coupon representing a joint of the battery module, the test coupon including a segment of a battery terminal connected to a segment of an interconnector busbar, the number of tension loads being applied to a location of the test coupon different from one or more welds of the test coupon through which the segment of the battery terminal is connected to the segment of the interconnector busbar; measuring a number of electrical resistance values across the segments of the test coupon in response to the number of tension loads applied; forming a plot between the electrical resistance values as a function of tension loads; and identifying based on the plot a particular tension load corresponding to a measured electrical resistance value.
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Specification