Patent ID: 8394527

Claim:
Accumulator comprising: at least one galvanic cell including a current conductor, a casing which at least partially surrounds the galvanic cell, and a contact area that is assigned to the casing, in which the casing is at least partially connected with the current conductor, wherein the casing comprises at least one first layer and one second layer, wherein the material of the first layer and the material of the second layer are different from each other in respect to at least one chemical substance; and a wall which at least partially surrounds at least one galvanic cell, wherein the wall comprises at least one third material and at least one fourth material, wherein said fourth material has a higher module of elasticity than the third material, wherein the fourth material is realized in the shape of fibers, wherein the fibers are at least partially connected in material engagement with the third material, and wherein the fibers are connected with each other, at least partly, in an elongated entity arranged essentially in the direction of a tensile force.