Electrical appliance using lithium secondary batteries
AssigneeHitachi, Ltd.
InventorJuichi Arai
Life of this patent
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Abstract
A lithium secondary battery comprising a negative electrode, a positive electrode, a separator and a non-aqueous liquid electrolyte, the non-aqueous liquid electrolyte having an electrical conductivity of 0.05 mS/cm or more and no such a flash point as specified by JIS-K2265 flash point test and comprising an ion nonconductive solvent and a lithium ion conductive solvent, is non-flammable and safe even at high temperatures.
Claims7
An electrical appliance using lithium secondary batteries, which have a non-flammable liquid electrolyte, as a power source, which comprises a protection circuit for the lithium secondary batteries, and a protecting means for protecting overcharging and overdischarging of the lithium secondary batteries, said protecting means comprising a means for detecting a voltage or current of the lithium secondary batteries, and a means for on-off controlling the power source on the basis of detected voltage or current values, said protection circuit being operated by detecting the voltage or current of the lithium secondary batteries without monitoring temperatures and pressures thereof.
Dependencies are inferred from the claim text.