| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery module capable of suppressing the load applied on the tab of a positive electrode or a negative electrode when an external force, such as vibration or impact, acts thereon.SOLUTION: In a secondary battery 100 having a positive electrode tab 22 connected with the electrodes 40, 60 while sealing a laminate laminating the electrodes with an exterior body 10, and derived from the end thereof, the electrode has a positive electrode collector 61, a positive electrode active material layer 62 formed on the positive electrode collector while leaving a partial exposed part 61a, and an insulation member 80 arranged to cover at least the boundary of the positive electrode active material layer and the exposed part. The positive electrode tab is connected electrically with the exposed part of the positive electrode collector, and assuming the maximum thickness from the positive electrode collector to a part covered with the insulation member is A, and the distance from the part where the thickness from the positive electrode collector becomes A to the boundary of the positive electrode tab and the exposed part is B, the A/B is 0.005-0.011 or less.SELECTED DRAWING: Figure 5 |
