| 摘要 |
PROBLEM TO BE SOLVED: To improve the heat radiating characteristic while increasing the apparent heat conductivity in the parallel direction with a plate, and to improve the output characteristic by forming a part of a metal thin plate substrate having the even thickness and forming a layered electrode plate obtained by coating the active material and winding a layered product thick in local while welding or integrally working to/with the same material with the substrate or a material having high heat conductivity. SOLUTION: Ribs 7 with a width L1 made of the same material with a positive electrode substrate 1 and having the same thickness with the positive electrode substrate 1 are affixed to one surface or both surfaces of the positive electrode substrate 1 with a space L2=2L1, and heat conductivity in the parallel direction with the plate in the case where the positive electrode substrate 1 is laminated with a negative electrode having the same structure is 1.26 times of the case where the ribs 7 are not affixed. At this stage, lowering of capacity due to the reduction of the positive electrode active material 3 coated on the positive electrode substrate 1 is decreased by restraining the rate of the width L and reducing the thickness of the separator. The ribs 7 are commonly used as collector tabs so as to avoid the increase of the manufacturing process due to the affixing of the ribs. With this structure, contact area between the substrate and the active material is increased. |
