NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PURPOSE:To avoid current concentration and restrict formation change at peripheral parts of a negative pole by disposing an insulation layer at the peripheral parts. CONSTITUTION:For a nonaqueous electrolyte secondary battery having a positive pole 2 mainly consisting of active material which can be re-charged and a negative pole 4 consisting of lithium or lithium alloy, an insulation layer 7 is formed by applying epoxy resin (for solder-resist) for a width of 0.5mm at peripheral parts of a disc-formed negative pole 7 of lithium-aluminum alloy and drying it. If lithium is solely used for the negative pole, metal lithium of a purity of more than 99.99% shall preferably be used.