Modular battery with exchangeable cell elements

The present disclosure relates to a method for manufacturing and to a method for replacing pouches of a secondary battery. The present invention also relates to a rack or base for a secondary battery. The base comprises a plurality of reception portions wherein each one of the plurality of reception portions comprises a fastening element for receiving and mechanically supporting at least one of a plurality of pouches. A pair of electrical contact elements is provided for contacting the electrochemical cell in the pouch.