Great lecture, very informative, well organized and illustration, with methodical design of experiment to compare the performance of these two spot welding machines. You are so creative to connect the Li-Po batteries in parallel, that never cross my mind and never saw that in the other RUclips clips.
Thank you for watching and commenting. Although not explained in this video, there are some caveats to paralleling Li-Po batteries. If there is a voltage difference between battery packs connected in parallel, a large current will flow between the batteries, causing heat generation and other dangerous conditions, so this should never be done. If the voltage of all battery packs is the same immediately after being fully charged with a balance charger, I think there is no problem. In the case of this battery pack, it is 12.60V because it is 3 cells. In my case, I keep the voltage difference between the battery packs to less than 0.1V, but there seems to be no problem.
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Many thanks for sharing your lesson learned!
Great lecture, very informative, well organized and illustration, with methodical design of experiment to compare the performance of these two spot welding machines.
You are so creative to connect the Li-Po batteries in parallel, that never cross my mind and never saw that in the other RUclips clips.
Thank you for watching and commenting.
Although not explained in this video, there are some caveats to paralleling Li-Po batteries.
If there is a voltage difference between battery packs connected in parallel, a large current will flow between the batteries, causing heat generation and other dangerous conditions, so this should never be done.
If the voltage of all battery packs is the same immediately after being fully charged with a balance charger, I think there is no problem.
In the case of this battery pack, it is 12.60V because it is 3 cells.
In my case, I keep the voltage difference between the battery packs to less than 0.1V, but there seems to be no problem.
さすがにIRの小さい12Vの電池の威力は別格ですね。
コメントありがとうございます。
最近、数100か所の連続作業を行いました。溶接ペンが持てないくらい熱くなってもリポバッテリーの発熱は僅かでした。
@@884kaz0 さん、それだけ大きな電流が流れているってこどですね。電池自体は放電だけならそれ程熱を持たないという２つの検証が大きなお土産ですね。
この溶接機は18650で組んだバッテリーでは使えませんか？
18650は高性能と言われているVTC6でも内部抵抗が13.5mΩと大きいので、3個直列で使う場合40.5mΩになります。これを6mΩレベルにするためには7並列にする必要があり、3x7=21本使って同レベルのバッテリーが作れるはずです。
（この動画で目指した0.2～0.3mmタブの溶接を対象とする場合であり、薄いタブの場合はバッテリーを減らせると思います）