Secondary battery

A secondary battery, comprising:

• a battery case comprising a case main body with an opening at an end thereof and a lid that covers the opening of the case main body;
• a safety valve which releases internal pressure, said safety valve being provided on the lid;
• an electrode body in which a positive electrode and a negative electrode are laminated in an insulated state and housed inside the battery case;
• an electrolyte housed inside the battery case;
• and
• a cover member arranged inside the battery case and between the lid and the electrode body so as to be separated from the safety valve provided on the lid, wherein
• the positive electrode comprises a positive electrode active material layer and a positive electrode current collector-exposed portion in which the positive electrode active material layer is not formed,
• the negative electrode comprises a negative electrode active material layer and a negative electrode current collector-exposed portion in which the negative electrode active material layer is not formed,
• the electrode body is housed in the battery case so that a lamination surface on which the positive electrode and the negative electrode are laminated opposes the safety valve,
• the cover member comprises a holding portion which holds the electrode body, and a shielding screen portion which covers a portion of the lid in which the safety valve is formed, and
• both the holding portion and the shielding screen portion are entirely insulative, wherein
• the holding portion contacts each of the positive electrode current collector-exposed portion and the negative electrode current collector-exposed portion in a thickness direction of the electrode body at the position opposing the lid, but does not contact the positive electrode active material layer and the negative electrode active material layer.