Method of making a mat-immobilized-electrolyte battery
Patent
·
OSTI ID:6263594
A method is described of assembling and preparing a mat-immobilized-electrolyte, Pb-acid storage battery for service comprising the steps of: alternatively stacking a plurality of positive and negative polarity electrodes together so as to provide a cell element having an inter-electrode gap between adjacent electrodes during the operation of the battery; positioning a separator in each said gap, said separator comprising a mat of randomly oriented, resilient glass fibers and a binder holding said mat in a stressed state at a compressed thickness which is at least about 10 percent less than said gap, said mat, in its uncompressed state, having a thickness greater than said gap, and said binder comprising a resin which is substantially insoluable in the battery's electrolyte but is sufficiently degradable therein under battery formation conditions as to free said mat from said stressed state during formation; positioning the stacked electrodes and separators in a battery container; introducing said electrolyte into said container such that it quickly flows between said electrodes substantially unencumbered by said compressed mat; allowing said battery to stand for a time sufficient to pickle said electrodes; and thereafter electrolytically forming said battery so as to initially charge said battery and so degrade said binder that said mat expands into tight engagement with the electrodes adjacent thereto.
- Assignee:
- General Motors Corp., Detroit, MI (United States)
- Patent Number(s):
- A; US 5240468
- Application Number:
- PPN: US 7-933603
- OSTI ID:
- 6263594
- Country of Publication:
- United States
- Language:
- English
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