The invention relates to a method for fitting at least one battery module (3) into a battery housing (1) of a traction battery of a vehicle, in which, in a delivery process step, the battery module (3) is introduced into the battery housing (1) in a robot-controlled manner via a delivery path and by means of a delivery force (F), and until reaching an assembled position (A) in which the battery module (3) is in the correct position on a contact contour (17) of a housing base (7) of the battery housing (1), and in a securing process step, the correctly positioned battery module (3) is secured in the battery housing (1). According to the invention, the delivery process step is monitored by a monitoring unit (40), which detects an actual delivery path (zist) and an actual delivery force (Fist) during the delivery process step, and evaluates whether the delivery process step is being carried out error-free or not on this basis.
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