Battery pole assembly structure, secondary battery and preparation method of secondary battery

The invention provides a battery pole assembly structure, a secondary battery and a preparation method thereof, the battery pole assembly structure comprises a battery pole group, battery tabs, a pole, an optical aluminum plate and a detection probe, the battery pole group is provided with the battery tabs, and the battery pole group is electrically connected with the battery tabs; the pole column is arranged on the battery pole lug, and the pole column is electrically connected with the battery pole lug; the pole is of a hollow structure, and an opening is formed in the pole; the light aluminum plate is sleeved on the post terminal, and the light aluminum plate is in insulated connection with the post terminal; and the detection probe is arranged in the pole and is used for detecting temperature and voltage parameters of the battery. In the structure of the invention, when the detection probe carries out temperature and voltage acquisition, the detection probe is only influenced by the bottom wall of the pol