NONAQUEOUS SECONDARY BATTERY AND SEPARATOR

摘要

The tasks of the present invention are to provide a secondary battery capable of easily generating the convection current of electrolyte and to provide a secondary battery capable of exchanging electrolyte. A non-aqueous secondary battery includes an anode, a cathode, a separator, and electrolyte, wherein the separator includes a groove to easily generate the convection current of the electrolyte. It is desirable that the non-aqueous secondary battery has at least one installation direction and the groove of the separator is vertical from the installation direction. Also, an exterior body includes: a first hole to inject inert gas inside the exterior body; and a second hole to discharge or inject the electrolyte from or to the exterior body. An electrolyte exchange device injects inert gas to the first hole and discharges or injects the electrolyte from or to the second hole.