- Joined Mar 8, 2020
So I'm wondering if there's a way to control the initial cold cranking amps of a car battery. I'm sure you're going to ask why so let me explain. I am using a car battery for spot welding. By simply shorting out the car battery momentarily on a couple of thin strips of metal, the amps are strong enough to weld. In fact they are strong enough to flat out burn the metal strips. I need to control that flow a little but still have upwards of 300 amps flow through. Most car batteries go from about 500 to 1000 amps so it's way over and burns any metal strips i try to weld. I've noticed there even seems to be residual electricity in the heavy gage wire i have connected to the posts. I have a high amp relay connected to one of the posts to allow for instantaneous connect and disconnect of the battery but dispite my pressing and releasing the switch for about a millisecond the metal continues to burn for several fraction of a second longer. An any case, any ideas?