Dui ni shuo de dui
10 kW
Hello guys,
I have a nice opportunity to purchase some A123 20Ah pouch cells, and I'm now wondering what method I should use to connect them together in series.
My main problem is that I don't have a lot of space and I plan to build a rather huge battery (24S 4P, so about 72V 80Ah).
So basically I would like to avoid using bolts and aluminum bars to connect each tab with the next one, because it would be too tight of a fit in my battery box and I cannot really make it bigger than that.
My idea so far would be to build some little PCB connectors, reinforced with lots of solder, and solder the pouch directly on these.
I believe the main concern here would be the heat during soldering, so my plan would be:
-Cover the entire PCB tracks with lots of solder
-Cover the tabs with a thin amount of solder, then cool it quicky using compressed air
-Press the tabs on the PCB
-Heat the whole thing so that PCB and tabs will be permanently attached, then cool everything quickly using compressed air
Goal here is to reduce the amount of heat going to the tabs, so that it doesn't spread to the cell itself. I think the amount of heat should be low enough to have no impact on the cells, but I'm wondering why it seems like so few people seem to use this kind of technique?
Is there any drawback I haven't think of ?
Any advice would be welcomed!
I have a nice opportunity to purchase some A123 20Ah pouch cells, and I'm now wondering what method I should use to connect them together in series.
My main problem is that I don't have a lot of space and I plan to build a rather huge battery (24S 4P, so about 72V 80Ah).
So basically I would like to avoid using bolts and aluminum bars to connect each tab with the next one, because it would be too tight of a fit in my battery box and I cannot really make it bigger than that.
My idea so far would be to build some little PCB connectors, reinforced with lots of solder, and solder the pouch directly on these.
I believe the main concern here would be the heat during soldering, so my plan would be:
-Cover the entire PCB tracks with lots of solder
-Cover the tabs with a thin amount of solder, then cool it quicky using compressed air
-Press the tabs on the PCB
-Heat the whole thing so that PCB and tabs will be permanently attached, then cool everything quickly using compressed air
Goal here is to reduce the amount of heat going to the tabs, so that it doesn't spread to the cell itself. I think the amount of heat should be low enough to have no impact on the cells, but I'm wondering why it seems like so few people seem to use this kind of technique?
Is there any drawback I haven't think of ?
Any advice would be welcomed!