I am neat, careful, and quick to avoid overheating when soldering. How possible is it to solder a large lithium-ion battery without damaging or degrading the battery? For connecting batteries together. I like doing things right, so I'm willing to buy a $100 Chinese battery connector welding box. But the foreseeable need is only about five two- cell battery packs. You do the math... Thanks. -- Gotta love water-soluble resin solder. Sparkling clean after a warm water rinse. That's my plug.
OT: Soldering large 18650/20700 lithium-ion batteries?
Started by ●January 5, 2020
Reply by ●January 5, 20202020-01-05
On Sunday, January 5, 2020 at 5:11:36 PM UTC-5, John Doe wrote:> I am neat, careful, and quick to avoid overheating when soldering. How > possible is it to solder a large lithium-ion battery without damaging or > degrading the battery? For connecting batteries together. > > I like doing things right, so I'm willing to buy a $100 Chinese battery > connector welding box. But the foreseeable need is only about five two- > cell battery packs. You do the math...I've tried soldering to a battery. I think it is the wrong type metal for standard solder. I forget the ways people do that sort of thing, but you can look it up on youtube. I've seen people copper plate aluminum so it can be soldered. Maybe that is viable. The copper plating didn't seem hard to do. -- Rick C. - Get 1,000 miles of free Supercharging - Tesla referral code - https://ts.la/richard11209
Reply by ●January 5, 20202020-01-05
Reply by ●January 5, 20202020-01-05
On 2020/01/05 2:11 p.m., John Doe wrote:> I am neat, careful, and quick to avoid overheating when soldering. How > possible is it to solder a large lithium-ion battery without damaging or > degrading the battery? For connecting batteries together. > > I like doing things right, so I'm willing to buy a $100 Chinese battery > connector welding box. But the foreseeable need is only about five two- > cell battery packs. You do the math... > > Thanks. > > > >Folks have had success using a car battery for spot welding...Use the starter solenoid and a push button and heavy copper lugs for the welding points. I need some piano wire forms spot welded to microswitch actuating tabs (fixing 1970s Bally home pinball switches) so am looking into the battery trick for those. John :-#)#
Reply by ●January 5, 20202020-01-05
> Folks have had success using a car battery for spot welding...Use thestarter solenoid and a push button and heavy copper lugs for the welding points. You can also use battery packs itself to spot weld additional one. Start with some spring mounted cells, than build it up. I am testing my 2 Kw 18650 packs on my Leaf now. Went a little farter than before. Paid $6 for 8 KWh rip-off at Delano Evgo. 5 miles from the next town. Sitting outside a farm for level 1. The guy is nice enough to let me charge; so, I don't need to set up my solar charger.
Reply by ●January 5, 20202020-01-05
On 2020/01/05 2:34 p.m., edward.ming.lee@gmail.com wrote:>> Folks have had success using a car battery for spot welding...Use the > starter solenoid and a push button and heavy copper lugs for the welding > points. > > You can also use battery packs itself to spot weld additional one. Start with some spring mounted cells, than build it up. > > I am testing my 2 Kw 18650 packs on my Leaf now. Went a little farterGas powered, eh? (sorry, couldn't resist). John ;-#)#
Reply by ●January 5, 20202020-01-05
Folks have had success using a car battery for spot welding...Use the> starter solenoid and a push button and heavy copper lugs for the welding > points. > > You can also use battery packs itself to spot weld additional one. Start with some spring mounted cells, than build it up. > > I am testing my 2 Kw 18650 packs on my Leaf now. Went a little farter> Gas powered, eh?Sorry, no gas, went further than before.
Reply by ●January 5, 20202020-01-05
On 2020/01/05 3:23 p.m., edward.ming.lee@gmail.com wrote:> Folks have had success using a car battery for spot welding...Use the >> starter solenoid and a push button and heavy copper lugs for the welding >> points. >> >> You can also use battery packs itself to spot weld additional one. Start with some spring mounted cells, than build it up. >> >> I am testing my 2 Kw 18650 packs on my Leaf now. Went a little farter > >> Gas powered, eh? > > Sorry, no gas, went further than before. > >I have an ancient Aurenthtic 24VDC motorcycle that I plan to restore - someday. Takes two deep discharge batteries and hits a top speed of 50KPH! Fast for the early 70s. https://jetmandan.blogspot.com/2009/03/auranthetic-electric-mini-bike.html Like I don't have enough projects! John :-#)#
Reply by ●January 5, 20202020-01-05
On Sunday, January 5, 2020 at 5:11:36 PM UTC-5, John Doe wrote:> I am neat, careful, and quick to avoid overheating when soldering. How > possible is it to solder a large lithium-ion battery without damaging or > degrading the battery? For connecting batteries together. > > I like doing things right, so I'm willing to buy a $100 Chinese battery > connector welding box. But the foreseeable need is only about five two- > cell battery packs. You do the math... > > Thanks. > > > > > -- > > Gotta love water-soluble resin solder. Sparkling clean after a warm > water rinse. That's my plug.Aren't similar batteries that have tabs on them available? You can then solder to the tabs, which is easy.
Reply by ●January 5, 20202020-01-05
Whoey Louie <trader4@optonline.net> wrote:> John Doe wrote:>> I am neat, careful, and quick to avoid overheating when >> soldering. How possible is it to solder a large lithium-ion >> battery without damaging or degrading the battery? For connecting >> batteries together. >> >> I like doing things right, so I'm willing to buy a $100 Chinese >> battery connector welding box. But the foreseeable need is only >> about five two- cell battery packs. You do the math...>> Gotta love water-soluble resin solder. Sparkling clean after a >> warm water rinse. That's my plug. > > Aren't similar batteries that have tabs on them available? You can > then solder to the tabs, which is easy.Probably, if I didn't already have plenty. I was planning to charge them in an ordinary slotted charger, using a battery holder on the project. That is a good point. If you are planning to use them in a pack with a balance charger, can find the correct source batteries in a cordless tool battery pack, if they are not much more expensive than bare batteries, and if they are properly connected (deduced by the voltage and capacity), that will save some work. The welds on those batteries are great.
