Replacing a Faulty Battery Cell in My Smart ForTwo

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Qunari_Qun

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I’ve been tackling a faulty cell in the high-voltage battery pack of my 2014 Smart ForTwo and thought I’d share my journey so far. After noticing some performance issues, I decided to take a closer look and confirmed that one of the cells was the culprit. With some caution and a lot of patience, I managed to remove the faulty cell without damaging anything else in the pack. Now, I’m looking for a replacement and planning my next steps for reassembly.

The process was nerve-wracking, as working with high-voltage systems always is. I started by carefully disassembling the pack, unplugging the battery management system, and removing the cell module. I made sure to use plastic tools and avoided putting strain on the surrounding components. It was a bit of a struggle, but I was able to isolate the bad cell without causing additional issues. Now I want to source a compatible replacement cell that fits the module’s specifications.
 
Hey great work on carefully handling the high-voltage pack! For sourcing a compatible replacement, consider checking with certified EV parts suppliers or the manufacturer.
 
Safety is paramount with these repairs, so I’d recommend double-checking your tools and workspace for insulation and grounding before reassembly. If you’re uncertain about any steps, consulting an EV technician might save you headaches down the line. Keep in mind that even a small oversight could lead to performance issues or safety risks with such a precise system.
 
Qunari_Qun said:
I’ve been tackling a faulty cell in the high-voltage battery pack of my 2014 Smart ForTwo and thought I’d share my journey so far. After noticing some performance issues, I decided to take a closer look and confirmed that one of the cells was the culprit. With some caution and a lot of patience, I managed to remove the faulty cell without damaging anything else in the pack. Now, I’m looking for a replacement and planning my next steps for reassembly.

The process was nerve-wracking, as working with high-voltage systems always is. I started by carefully disassembling the pack, unplugging the battery management system, and removing the cell module. I made sure to use plastic tools and avoided putting strain on the surrounding components. It was a bit of a struggle, but I was able to isolate the bad cell without causing additional issues. Now I want to source a compatible replacement cell that fits the module’s specifications.
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Did you end up finding more cells? I'm kinda stuck in the same situation over here!
 
Oh wow! Thanks for sharing this information. But batteries can't be turned off right? And these lithium batteries, they're so dangerous. I had a friend who had the battery burst into massive flames. Good thing he had a fire extinguishing ready before he started working on it.

As our electric vehicles get older, the need for information on battery replacement will likely increase. I'm optimistic that we'll soon have access to batteries with greater capacity.
 
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Impressive work! Dealing with high-voltage batteries is no joke, but you tackled it like a pro. Good luck finding the right replacement cell, and I’m sure your careful approach will pay off when you reassemble everything. Keep us posted on how it goes
 

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