Building a 12V 110Ah battery bank using 80 32650 LiFePO4 cells

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Kerry Wong built a DIY battery bank using eighty 32650 LiFePO4 cells:

During the past couple of weeks I have been busy making a large battery bank using the eighty 32650 LiFePO4 cells I bought on eBay. The battery bank I am building is a 12V (13.2V nominal) 4S/20P one. With each cell rated at 5.5Ah the battery bank has a capacity of 110Ah, which is just under 1.5kWh.
While These cells are marked as 32700 they are technically still 32650 cells according to the datasheet, which is a little bit confusing. Since I am making a custom battery bank the actual cell dimension is not as critical.

See the full post on his blog.

Check out the video after the break.

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2 Comments

  1. Kerry Wong has big brass balls. Bundles of large cells wrapped in cardboard, placed in what, a wooden frame? Terminals pushing 100A. He thinks: “But for stationary use with a power inverter, this failure mode is highly unlikely.” Problem is, did we manage to consider _all_ failure modes? But you gotta admit, it’s DIY badassery. (Nice to view from afar, but I’d never try it myself, ha ha.)

    I’d be really surprised if this thing does not have an impact on his house insurance premium rate.

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