Hi All,
There were some recent fire incidents in the EV scooters. I would like to understand following from Ather PE team.
How the battery current limiting is working as the cause of fire should be over current mainly. How it is implemented in 450X?
Is there a buck boost stage in between the battery and the motor controller to stabilize the DC link?
What is inside the motor controller (this is just out of curiosity)
Re,
AB
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You could check this video for details.
We recently hosted this session on Linkedin from a hiring POV, but have now made it available for everyone here:
It’s slightly long but is really comprehensive on how we build safer battery packs
And this is one of the statements from The team a few months when one EPluto or some other scooter caught fire.
Literally, the first thing we do when we start any new battery development is a test for a thermal runaway scenario. Thermal runaway is when there’s an uncontrollable increase in temperatures, which can cause fires. Thermal runaways can occur due to a variety of reasons but the primary ones are short circuits, cell internal short, and mechanical abuse. The BMS and other short circuit protection in the battery protect the pack from any shorts. There are actually three levels of short circuit prot…
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sumit8989
April 22, 2022, 12:22pm
3
From fundamental PE knowledge… That can be achieved using saturation limit in the current control mode of charging the battery. Usually a pfc and isolated dc dc (flyback or llc ) should be there. Ather people may give the details
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