First module assembly

A project log for A 110 kWh Powerbucket

The lead-acid batteries of my off-grid solar system are dead. I will replace them by a 18650 batteries stack housed in a big wooden box.

Michel Kuenemann • 09/12/2016 at 20:47•0 Comments

I have started to assemble the very first module. It is made of 70 Panasonic NCR18650PF cells:

The bus bars are standard 10 X 3 mm² tinned copper bars. The total cross section is 60 mm².

Thanks to the assembly jig, the pitch of the nickel strips is precisely 19 mm. Welding the strips on the positive terminals of the cells is therefore very easy.

I weld twice every battery, resulting in four spots.

The very first welding spot.

The module is ready for positive terminals spot welding

70 Panasonic NCR18650PF cells inserted in their battery holder:

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Creating an assembly jig

09/12/2016 at 20:39 • 0 comments

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Lead-acid batteries removed

09/28/2016 at 19:27 • 2 comments

First module assembly

Creating an assembly jig

Lead-acid batteries removed

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