Reinforced carrier device for a battery pack and process for the assembling of a reinforced battery pack

A reinforced carrier device for a battery pack of an electric or hybrid vehicle, the reinforced carrier device comprising at least:

• a carrier device including at least one side wall and a base wall provided to receive a plurality of battery modules of the battery pack;
• a reinforcement structure of the side wall including at least an inner reinforcement piece and an outer reinforcement piece extending along at least a part of the side wall, at least partially facing each other, and being respectively secured to opposite faces of the side wall then forming a reinforcement arrangement, wherein the reinforcement arrangement includes:
• at least two adjacent reinforcement hollow portions both being traversed by the side wall of the carrier device and each made of an inner reinforcement hollow section of the inner reinforcement piece and an outer reinforcement hollow section of the outer reinforcement piece, the inner and outer reinforcement hollow sections at least partially facing each other, and
• a longitudinal reinforcement fastening portion located between the adjacent reinforcement hollow portions, secured to the side wall, and made of an inner reinforcement fastening section of the inner reinforcement piece and an outer reinforcement fastening section of the outer reinforcement piece, the inner and outer reinforcement fastening sections at least partially facing each other.