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by sm7tjc
Tue Apr 06, 2021 2:07 pm
Forum: Batteries and Battery Management
Topic: Replace CMU?
Replies: 6
Views: 722

Re: Replace CMU?

Yes, I have dropouts on all the cells. One cell is more severe, but I can see fluctuation on all the cells (This pack has 4 cells). Today I found a guy from the Netherlands, who is selling these boards on ebay, and I ordered one. I am wating for his respond about the numbering. I think that he can c...
by sm7tjc
Mon Apr 05, 2021 11:50 am
Forum: Batteries and Battery Management
Topic: Replace CMU?
Replies: 6
Views: 722

Re: Replace CMU?

Thank you for the answers. I found a monitor function in Diagbox, and the cell voltages on CMU12 looked like this http://www.sm7tjc.com/battery.jpg As the dropouts are completely random it looks like the IC that reads the cell voltage is failing. The IC is from Analog Devices and I just happened to ...
by sm7tjc
Sat Apr 03, 2021 3:45 pm
Forum: Batteries and Battery Management
Topic: Replace CMU?
Replies: 6
Views: 722

Replace CMU?

Hi. This is my first post here. My I-miev from 2011 will not charge more than for about a minute or so. It started with interrupted charging now and then, but now it is almost impossible to charge. I get error P1A81 from the BMU, and the yellow light comes on. When I checked the voltages from CMU12 ...

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