| 摘要 |
PROBLEM TO BE SOLVED: To obtain a square secondary battery having a high liquid ejection efficiency and into which a liquid can be injected in a short time.SOLUTION: A square secondary battery 10 includes a wound electrode group 6 in which positive electrode plates 6E and negative electrode plates 6D are wound with a separator 6C interposed therebetween, a battery can 1 in which the wound electrode group 6 is housed in such a position that the axial direction of winding of which extends in the lateral direction, and a lid 2 sealing the upper opening of the battery can 1 and having a liquid injection port 12 for injecting an electrolyte into the battery can 1. A guide member 80 having a ramp 82 inclining toward one side in the axial direction of winding is disposed in the battery can 1 to face the liquid injection port 12. |
