Device for inspecting lateral surface of cylindrical battery

A side surface inspection device for a cylindrical battery that has a first region as a part of a side surface and a second region as a remaining part of the side surface, the first region and the second region being sequentially disposed along a circumference, the device comprising:

• a housing surrounding at least the first region of the cylindrical battery;
• a first light on an inner surface of the housing and configured to emit light to the side surface of the cylindrical battery;
• a first mirror and a second mirror respectively disposed on both sides of the cylindrical battery to each reflect light from respective portions of the first region of the cylindrical battery;
• and
• a camera configured to receive the light reflected from the respective portions of the first region of the cylindrical battery, configured to capture a first image from the light reflected by the first mirror, and configured to capture a second image from the light reflected by the second mirror,
• wherein the first region of the cylindrical battery is more than half of the side surface of the cylindrical battery, and
• wherein the first and second images corresponds to a full region of the first region of the cylindrical battery.