Method for producing a pressure accumulator, and pressure accumulator

Abstract

The invention relates to a method for producing a pressure accumulator (1), in particular for storing hydrogen in motor vehicles. First, a pressure accumulator (1) liner (3) which has at least one pole cap (2, 2') is produced preferably by means of a plastic blow molding method, and the outside of the liner (3) is then provided, preferably braided, with a multi-ply reinforcing layer (9), which has reinforcing fibers (8). According to the invention, a fiber supply cap (10, 10') is applied on the pole cap (2, 2') prior to applying the reinforcing fibers (8), the outer surface of the fiber supply cap being spaced from the pole region (21, 21') of the pole cap (2, 2'). The reinforcing fibers (8) are applied onto the body of the liner (3) and in the pole region (21, 21') so as to correspond to the outer surface of the fiber supply cap (10, 10') while the reinforcing layer (9) is being applied such that the inner reinforcing layer (9) plies which are formed by the reinforcing fibers (8) are provided with a fiber supply (22) in the pole region (21, 21') on the basis of the distance between the outer surface of the fiber supply cap (10, 10') and the pole region (21, 21') of the pole cap (2, 2'). The invention also relates to a pressure accumulator (1) produced in a corresponding manner.

Description

technical field [0001] The invention relates to a method for producing a pressure vessel (Druckspeicher, pressure storage tank), in particular for storing hydrogen in a motor vehicle, [0002] - firstly, an inner liner (inliner) with at least one end cap (Polkappe, endcap) of the pressure vessel is preferably produced by means of plastic blow molding, and [0003] - A reinforcing layer with multiple layers of reinforcing fibers is then provided, preferably woven, on the outside of the lining. Background technique [0004] Such a method is known, for example, from WO 2010 / 145795 A2. A pressure vessel for storing hydrogen in a motor vehicle must, on the one hand, provide the largest possible storage volume within a given installation space and, on the other hand, must have a low weight in order to ensure low fuel consumption. Furthermore, there is an inherent need for such pressure vessels to also be producible at competitive costs. [0005] A pressure vessel with an inner ...

AI Technical Summary

Problems solved by technology

[0006] If the plastic lining is provided with a reinforcing layer made of reinforcing fibers, the problem usually arises that the reinforcing fibers of the inner layer of the reinforcing layer withstand significantly higher pressures than the outer layer at an operating internal pressure of the inner lining, which is typically several hundred bar. mechanical load

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