A safety control method for radio welding machine

Abstract

The invention discloses a safety control method for a wireless electric welding machine. The method comprises: an electrical switch is turned off and whether a voltage is in a safety discharging voltage value range is determined; if so, a discharging relay control port S1 is true; a PTC module determines whether a battery unit temperature is normal; if so, a discharging relay control port S2 is true; a DC-DC module starts discharging; a discharging state is determined and if discharging can not be carried out normally, a warning device is started; a control unit determines whether a discharging current value or a discharging power is normal; if not, an instruction is sent and thus a discharging relay control port S3 is false; waiting is kept for 30 seconds; if the situation is abnormal, the warning device is started. According to the method, on the basis of three-level security protection of PWM signal control, a control unit, and a PTC module, security of the working process of a wireless electric welding machine is guaranteed; security of a lithium battery unit can be protected effectively; and the damage of the service life of the lithium battery on the severe discharging condition can be avoided.

Description

technical field [0001] The invention relates to a safety control method, in particular to a safety control method for a radio welding machine, and belongs to the technical field of welding equipment. Background technique [0002] The electric welding machine is a device that uses the high-temperature arc generated when the positive and negative poles are short-circuited instantaneously to melt the solder on the electrode and the material to be welded to combine them. According to the type of output power supply, welding machines can be divided into two types, one is wired welding machine; the other is wireless welding machine. When in use, the wired welding machine needs to be powered by the mains, so the use environment of the welding machine must provide a certain capacity of AC power. For some welding sites that cannot be connected to the mains or the capacity of the mains is small and the welding volume is small, the power supply cannot be supplied by the mains. For thi...

AI Technical Summary

Problems solved by technology

For some welding sites that cannot be connected to the mains or the capacity of the mains is small, and the welding volume is small, the power supply cannot be supplied by the mains. For this welding situation, a wireless welding machine is usually used. The wireless welding machine uses the battery pack The direct current provided is converted into the voltage required for welding, specifically divided into DC / AC wireless welding machines and DC / DC wireless welding machines. Due to the convenience of wireless welding machines, they have gradually been applied and promoted in the market. Some wireless welding machines use lithium-ion batteries. As a battery unit, due to the characteristics of lithium-ion batteries, conventional safety protection cannot guarantee the safe and efficient operation of lithium-ion batteries, and the welding machine itself has strict safety protection, and the existing technology cannot meet the actual safety needs

Images