将主板放到焊接工装上(如图2)，取纽扣电池，将纽扣电池放置在主板柏油框

Put the main board on the welding fixture (see Figure 2), take the button battery, place the button battery on the tar frame of the main board, and weld it close to the positioning fixture, as shown in Figure 3. <br>Use a small horseshoe-shaped soldering iron to solder the positive and negative electrodes of the button battery. The welding sequence is the negative electrode and then the positive electrode. Note that the negative electrode must be welded first, and then the positive electrode should be welded after the negative electrode is welded. The soldering iron temperature needs to be inspected before delivery. The soldering temperature is 390±10℃, and the soldering time is controlled within 3~5s. The soldering is completed as shown in Figure 4.

Place the motherboard on the welding tooling (as shown in Figure 2), take the button battery, place the button battery on the tarmac frame of the motherboard, and weld it close to the positioning tooling, as shown in Figure 3.<br>Tin the positive and negative electrodes of the button battery with a small horseshoe shaped iron head. The welding sequence is negative electrode first and then positive electrode. Note that the negative electrode must be welded first, and then the positive electrode after the negative electrode is welded. Soldering iron temperature pre production spot inspection, welding temperature: 390 ± 10 ℃, the welding time is controlled within 3 ~ 5S, and the welding is completed as shown in Figure 4.<br>

Place the main board on the welding tool (as shown in Figure 2), take the button cell, place the button cell on the asphalt frame of the main board, and weld against the positioning tool, as shown in Figure 3.Use a small horseshoe-shaped welding head to weld the positive and negative poles of button cell with tin. The welding sequence is negative electrode first and then positive electrode. Pay attention to welding negative electrode first and then positive electrode. The soldering iron temperature needs spot check before delivery. The welding temperature is 390 10℃ and the welding time is controlled within 3~5s. The welding is completed as shown in Figure 4.