WalkerYYJ
1 mW
Hey all,
Working on a project that will have 12x 25Ah LiFePO4 prismatic cells https://www.electriccarpartscompany.com/Fortune-25Ah-Aluminum-Encased-Battery (12S) built underneath the frame of a cargo bike's cargo bed
The concept I’m rolling with at the moment is to use 2”x1” Tslot https://www.mcmaster.com/47065T107 to outline the battery bay which will exist as a void space bellow the floor of the cargo bed. I’m going to use aluminum plate (1/8”?) for the cargo bed floor, (access hatches cut out), and another plate to accommodate the floor of the void space (if that makes sense.) T slot grooves, and the edges of the 2 plates will be sealed with RTV silicone/similar.
The end result will be a fully sealed aluminum box containing ~1000 Whrs of batteries. I’m assuming I should add some provisions for pressure relief in the (hopefully) unlikely even that a LiFePO4 cell were to have a runaway. How have others approached this? I’m thinking of adding 1-2? Rupture disks to the bottom plate ?? https://www.mcmaster.com/rupture/ but not sure if there’s some other best practices on this… Also not sure how quickly one could expect a pressure build up to occur….
Would love any suggestions or guidance.
Working on a project that will have 12x 25Ah LiFePO4 prismatic cells https://www.electriccarpartscompany.com/Fortune-25Ah-Aluminum-Encased-Battery (12S) built underneath the frame of a cargo bike's cargo bed
The concept I’m rolling with at the moment is to use 2”x1” Tslot https://www.mcmaster.com/47065T107 to outline the battery bay which will exist as a void space bellow the floor of the cargo bed. I’m going to use aluminum plate (1/8”?) for the cargo bed floor, (access hatches cut out), and another plate to accommodate the floor of the void space (if that makes sense.) T slot grooves, and the edges of the 2 plates will be sealed with RTV silicone/similar.
The end result will be a fully sealed aluminum box containing ~1000 Whrs of batteries. I’m assuming I should add some provisions for pressure relief in the (hopefully) unlikely even that a LiFePO4 cell were to have a runaway. How have others approached this? I’m thinking of adding 1-2? Rupture disks to the bottom plate ?? https://www.mcmaster.com/rupture/ but not sure if there’s some other best practices on this… Also not sure how quickly one could expect a pressure build up to occur….
Would love any suggestions or guidance.