NOVELTY - Electrochemical cell stack compression system comprises integral, hollow frame configured to contain several electrochemical cells arranged in stack along axis of the hollow frame, where the frame has a defined shape and forms continuous border around a periphery of the electrochemical cell stack when contained within the frame, and the frame is formed of several fibers.    USE - The electrochemical cell stack compression system is useful in electrochemical cell (claimed) which is useful for generating electric current from chemical reaction.    ADVANTAGE - The electrochemical cell stack compression system is cost-effective, compact and lightweight.    DETAILED DESCRIPTION - Electrochemical cell stack compression system comprises (a) integral, hollow frame configured to contain several electrochemical cells arranged in stack along axis of the hollow frame, where the frame has a defined shape and forms continuous border around a periphery of the electrochemical cell stack when contained within the frame, and the frame is formed of several fibers, (b) structure having a defined shape that is configured to receive and contain several electrochemical cells arranged in a series along an axis to form an electrochemical stack, and at least one compression mechanism configured to apply a compressive force to the electrochemical stack, where the compression mechanism is located adjacent to and along the axis of the electrochemical stack and the structure forms a continuous border surrounding the electrochemical stack and the at least one compression mechanism when contained or (c) electrochemical stack compression system comprises an integral, hollow structure having a defined shape and formed of several wound fibers, several electrochemical cells arranged in a series along an axis to form an electrochemical stack, where the electrochemical stack is contained within the structure, at least one end block contained within the structure and located adjacent to an end region of the electrochemical stack, and at least one compression mechanism contained within the structure, where at least one compression mechanism is configured to apply a compressive force to the electrochemical stack, and at least one compression mechanism are arranged in series with one another within the structure such that the structure forms continuous border around and adjacent to a periphery of the electrochemical stack, at least one end block, and at least one compression mechanism, when arranged in series. An INDEPENDENT CLAIM is included for method of pre-loading the compression system involves inserting the electrochemical stack into the structure, inserting the at least one compression mechanism into the structure, configuring the compression mechanism to apply a predetermined load within the compression system, and measuring a change in height of the structure along the axis of the electrochemical stack to determine the load being applied by the compression mechanism.