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|1. (WO2018020906) RECTANGULAR SECONDARY BATTERY|
|Applicants:||HITACHI AUTOMOTIVE SYSTEMS, LTD.
|Title:||RECTANGULAR SECONDARY BATTERY|
Provided is a rectangular secondary battery capable of preventing internal micro short circuiting (voltage reduction) which occurs due to conductive impurities entering from the negative terminal collector side. This rectangular secondary battery 100 has a flat-shaped wound group 3 which is wound such that separators 33 and 35 are interposed between a positive terminal 34 and a negative terminal 32. The positive terminal 34 has a positive-terminal mixture layer 34b applied to a positive-terminal metal foil, and a positive-terminal metal foil exposed part 34c where the positive-terminal metal foil is exposed. A resin layer 50 for adhesion between the separators 33 and 35 is provided at an end part on the opposite side of the positive-terminal metal foil exposed part 34c.