两个端子间瞬间接入80V、1A高电压，进行电击，展开素子，寻找打火点。

A high voltage of 80V and 1A is instantaneously connected between the two terminals for electric shock, unfolding the element, and looking for the ignition point. <br>Result: The element was unfolded, and the short-circuit point was located at the nailed petal. The cause of the short circuit was that the guide pin was moved by external force, which caused the nail petal to move, punctured the electrolytic paper, and showed a short circuit.

Between the two terminals instantly connected to 80V, 1A high voltage, electric shock, expand the tweezers, looking for a fire point.<br>Results: Expand the son, the short-circuit point is located at the nail petal, confirm the short-circuit cause is the external force of the guide needle movement, drive the nail-hooking petal movement, puncture the electrolytic paper, present a short circuit.

A high voltage of 80V and 1a is connected between the two terminals to conduct electric shock, expand the prime and find the ignition point.<br>Results: the short-circuit point was located at the nail petal. The cause of the short-circuit was that the guide needle moved under the external force, driving the nail petal to move, puncturing the electrolytic paper, showing a short circuit.<br>