| abstract |
A conventional coin-type (button-type) non-aqueous electrolyte secondary battery using a metal oxide of 3V voltage as a positive electrode, when reflow soldering is performed, is used in most combinations of electrolytes and electrolytes in heat-resistant battery members. There has been a problem that a metal oxide serving as a positive electrode active material reacts to cause deterioration of battery characteristics. SOLUTION: As a result of lowering the reactivity between a metal oxide serving as a positive electrode active material and an electrolyte at a high temperature of reflow soldering by setting the solute concentration of the electrolyte to 1.5 to 2.5 mol / l, It has become possible to manufacture non-aqueous electrolyte secondary batteries that can be reflow soldered. [Selection diagram] Fig. 1 |