eleven6
1 W
Has anyone built a pack with this type of nickel tape in an 18650 pack? I'm looking to run a split pack of two blocks of 10S8P in series for a total of 84V, 45A nominal. The dimensions for the nickel tape .15mm x 7mm width. Actually it's worse, it slims down to 6mm in width for the series connections. I am concerned about not having enough area for power delivery and have been considering soldering 4 small lengths of wire to connect each parallel group spaced between the joint. I'd rather avoid the soldering though so I'm having second thoughts. Just looking for some advice before I take the plunge one way or another and begin the welding process.
Here's what I end up with if I do the math:
According to google, the ampacity of a copper 1in2 bus-bar is 1000A. Converting 1in2 to mm2 is 645.16mm2.
If I take .15mm x 6mm, that is only 0.9mm2. Solving for the ampacity as a proportion leaves 900A/645.16mm2 = 1.39 A per connection.
Worse, since it is pure nickel it's actually 1/4 of this value due to the difference in resistance at .35 A ampacity for each interconnection. That seems like it will suck for my application considering I need 45A/8 = 5.6 A ampacity for each connection.
Am I missing something here, or is this really unsuitable for the battery build without soldering?
Here's what I end up with if I do the math:
According to google, the ampacity of a copper 1in2 bus-bar is 1000A. Converting 1in2 to mm2 is 645.16mm2.
If I take .15mm x 6mm, that is only 0.9mm2. Solving for the ampacity as a proportion leaves 900A/645.16mm2 = 1.39 A per connection.
Worse, since it is pure nickel it's actually 1/4 of this value due to the difference in resistance at .35 A ampacity for each interconnection. That seems like it will suck for my application considering I need 45A/8 = 5.6 A ampacity for each connection.
Am I missing something here, or is this really unsuitable for the battery build without soldering?