How Lithium Polymer Batteries are Made

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Contributors: Nate
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Electrode Creation

Electrode Creation

These machines take the rolls of electrodes, attach a terminal or tab, cut them to the proper length, and a whole bunch of other things I can’t quite discern.

LiPo Battery Anode Preparation

Here’s a video of the machines in glorious action.

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And there’s a ton of them.

LiPo Battery Terminal Welding

Here’s a close up of the tab welding.

Machine to combine electrodes

Once a pile of a given anode type is made, it is brought together with a pile of the cathode of the same size. A semi-permeable membrane is inserted between the layers, and the three strips are then folded together many times.

The above machine is a semi-automatic machine. It requires the operator to insert and line up the two electrodes, but it does the rest.

LiPo Battery Inner Cell Wrapping

Here’s a video of the machine wrapping a cell.

LiPo Battery Cell Wrapping

Above is a close-up of the folding or wrapping of the layers.

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And when you’re done you have the layers folded many times and taped.

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Multiply the lines, and you can see how this factory produces 750,000 units a month.

LiPo Battery Massive Wrapping Machine

Above is a more automated wrapping machine. This level of automation makes me giddy. How do you build something like that and keep it running without constant tweaking?! Amazing.