Apparatus for manufacturing separator for rechargeable battery, method of manufacturing separator for rechargeable battery, and rechargeable battery

A method of manufacturing a separator for a rechargeable battery, the method comprising:

• manufacturing a laminate of a porous substrate and a coating film for a coating layer formed on at least one surface of the porous substrate;
• and
• transferring the laminate into a drying unit of a rechargeable battery manufacturing apparatus to dry the coating film for a coating layer,
• wherein the drying unit includes a drying oven providing a drying space for the coating film for a coating layer, and an injection plate located in the drying oven and having a plurality of discharge holes which inject hot air toward the coating film for a coating layer,
• the injection plate has an opening ratio in a range of about 10% to about 65% as shown in Equation 1,
• Opening
• ⁢
• ratio
• =
• (
• 90.5
• ×
• d
• 2
• )
• /
• p
• 2
• ;
• Equation
• ⁢
• 1
• wherein:
• d is an average diameter of the discharge holes and d is in a range of about 5 mm to about 20 mm, and
• p is a separation distance between the centers of the discharge holes among the plurality of discharge holes and is in a range of about 10 mm to about 15 mm.