rojitor
100 kW
Test test and test. Once you succeed go for it.
I recommend 0.1 thick
I recommend 0.1 thick
rojitor said:I did this weekend a shockproof pack for a Trampa mountainboard. My customer is more of an animal than a human so it really needs to be rock solid to last in his hands.
I used both welding and the neodinium magnets technique. The welds are really really unlikely to fail due to vibrations and continuous hard landings.
The neodinium magnets technique has been widely discussed at this very forum. Once the magnets are epoxied/glued or stuck somehow they do not let the copper sheet move. I used 0.1 copper sheet and my boss welder.
I used a smart bms to charge to 4.10v the cells, skip voltmeter and lock the battery. Controlled by Xiaoxiang app android.
It has high density foam on and under the pack so it can absorb vibrations. Of course insulated with kapton, barley paper and eva foam. The spacers grant both natural cooling and increase greatly the structure strength. Has some glass fibre tape too.
It's been put inside a carbon fibre box and has a fuse protection.
There's no way to destroy this pack
I taped part of the proccess. I will make a video if i find some time.
rojitor said:Sorry guys. I have just buried my mom.
I have no time for this.
Hummina Shadeeba said:my Boss spot welder flickers "fet error" and beeps, and i turn it on and off a couple times and the flickering stops and it works again. i go back to welding and again make another big blowout with no cell behind the copper shooting blindly, and it goes back to flickering "fet error" and its not seeming to come back now. its stuck on "fet error". i prayed to the gods many times and this time seems its not coming back.
i dont think these welders are made anymore. how to get it fixed? whats another reliable welder that will do the .1mm copper sheet ive been using?
Hummina Shadeeba said:Mine says fet error and won’t work. Anyone fix these?
I’m in need of something that will weld .1mm copper so I can finish this battery. Any recommendations for something I can get fast to Cali?
It said fet error after I welded without the cell being pressed firmly and causing a big blowout in the .1mm copper, then it came back, then I did it again, then it came back, then I did it again and something shot off from the welder and it smells like gunpowder. Think it’s dead for sure now.
Hummina Shadeeba said:I see them for sale on eBay. Guess they’re still for sale. Need something stat if u know a welder that can do .1mm copper.
Ciclon said:Hummina Shadeeba said:I see them for sale on eBay. Guess they’re still for sale. Need something stat if u know a welder that can do .1mm copper.
It will do nickel plated 0.15mm copper. Like these:
https://www.ebay.com/itm/Pure-Nickel-Plated-Copper-Strip-Tab-0-15mm-x-8mm-18650-US-Sales/133104900617?var=432415150001&_trkparms=ispr%3D1&hash=item1efdab9a09:g:azYAAOSwplBdH6OQ&amdata=enc%3AAQAFAAACgBaobrjLl8XobRIiIML1V4Imu%252Fn%252BzU5L90Z278x5ickkBUIiHwYv5YgVss0WaiENz5lxCb1iE0UoCE7aZU6meiKFYF%252BTpiVWlkhkCXU9ayNMZOcugycklcx1NufQl0RvxBQ%252ByWv5G13tFzD51UXWH6lePNFnV6tnqg9i%252F%252FbSvN%252BsKeISSKEw0lfQfMOFPpxlX2%252Bwd0WUUA4VR3Fe%252Bn5xbbsClVwXRvB9EQ51GmHJQUcCwOseCq9cRV0T3NbHz7tH73AgSQyodl%252BDvU%252BMSjBdWntcoOMKAcq%252Fi1hZQW62ZF1ayFMe%252BRBqHERScpq1PeYN25QNrALm26Sj7%252FY%252F0leQ%252F8O1uHpjyekhjMfzHjCcLiqyqslma6a7s7kWxipHrwKbga3TEoezHgQqBpMbUitnKmOOHK%252Fes4eM4kWMxm9ccPUbFNaz8PmnL21Lb5ISu%252Fx6KFhBvkbXWYB1aiu5bsSf2MnWrVJfUFVhLDeXe%252Ffnc10WPkt%252F2rsaI106u1X%252BnhN4AnTRX0gUoj6Ss99ZddV7wJcpFnr7I2J4%252FKGi3Dz9c8Y3Nm%252BfxzBiFr1Hrx51RYHvKW8PxZOan8F3bVAZF%252FmFUym9c1G37ag8rgmEk0MaoVKxhoYM1oXzkA3JNPpTS%252BLX7D6OeOPu61O5Zqs6bDHvCWa%252FBO5Zfiwji8Bn8IVlK%252FH%252Bv5XT3PgqEWWBmBg7foUE2B%252FIR6dVGyqCyX%252BuAGvNlGrCO9%252By7IRUkBmQPpqSoHvLreaEtTJa3MT9DtEcq3lWhWcrlyY1APUhROLEc68kL4xs%252FhOM%252BoWSxsgK80tlZMY3sYdCxT33P6DusabmmUatY%252BaPv7IHXrD2IJVAhVc6A3g%253D%7Ccksum%3A13310490061711e50dfce7a3402a8f20d243f10bb9a9%7Campid%3APL_CLK%7Cclp%3A2334524
He also sells 0.3mm plated copper. This welder will not weld those. Ask me how I blew the FET's twice already.
Ciclon said:Sure you can. But you do need some experience with a solder iron. It's not what I would call easy.
ichiban said:I have prepared everything… 0.2-mm Cu pad + slotted 0.15-mm Ni-plated steel