Battery pack refined finite element model building method

The embodiment of the invention discloses a refined finite element model building method for a battery pack, and the method comprises the steps: building a finite element model of each component of the battery pack, each component of the battery pack comprises a box body, an outer support, an inner support, a battery module, a cover plate, a tray, a reinforcing beam, a pressing rod, a bracket, a supporting foot, a box cover, a BMS, a relay and a high-voltage box, force transmission components such as a battery module composed of battery cells in a battery pack, a pressing rod and the like are reserved, a refined model considering a box body, an outer support, an inner support, the battery module, a cover plate, a tray, a stiffening beam, the pressing rod, a bracket, a supporting foot, a box cover, a BMS, a relay and a high-voltage box is established, and the structural response of the battery pack box body can be accurately reflected; the method can be used for various simulation analysis of rigidity, modalit