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by coulomb
Wed Jun 22, 2022 8:31 pm
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC)
Replies: 921
Views: 694778

Re: Troubleshooting and repair for On-board Charger (OBC)

Помимо фавельной пластины, из строя вышли несколько конденсаторов, которые стояли на другой плате. Их заменил на такие же. У нас нету свалки машин. И запчасти продают только на разборках. И некоторые продавцы завышают цену на товар. Google translation (two posts): In addition to the [ waffle ] plat...
by coulomb
Fri May 13, 2022 10:30 pm
Forum: Batteries and Battery Management
Topic: Firmware for charger, BMU, CMUs
Replies: 19
Views: 23283

Re: Firmware for charger, BMU, CMUs

i wonder if there might be a Boot pin on the JTAG interface on the BMU board? Could be. But the BMU firmware seems to be encrypted; only the CMU firmware seems to be unencrypted. There seems to be 2 approaches to modification of the battery capacity for upgrading or replacing the pack with larger c...
by coulomb
Thu Apr 28, 2022 8:09 pm
Forum: Off Topic
Topic: Admin: Spam Concerns
Replies: 43
Views: 42307

Re: Admin: Spam Concerns

if a new 'member' does not introduce themselves as having some interest or association with the i-MiEV (or triplet) and puts in a vapid post that is not on-topic, I'm afraid that I'll be deleting that post but will stop short of banning them in case they are really legit. Yes, you need that. On one...
by coulomb
Fri Apr 22, 2022 5:12 pm
Forum: Batteries and Battery Management
Topic: 2012 iMiev charging problems. New problem
Replies: 9
Views: 786

Re: 2012 iMiev charging problems. New problem

The new battery is on its way... Do you mean one new cell, or a complete replacement high voltage battery? I assume you mean one cell. That photo with the 0.45 V cell tells a story. You will have to balance the cells carefully before re-assembly. I'm surprised that you are able to get the contactor...
by coulomb
Fri Apr 22, 2022 5:03 pm
Forum: General Technical Discussions
Topic: Charging MiEV trips arc-fault breaker
Replies: 8
Views: 3354

Re: Charging MiEV trips arc-fault breaker

what is an arc breaker? Is it a device used to detect the presence of loose connections in the wiring of a house? I had to look it up too. You are correct: https://en.wikipedia.org/wiki/Arc-fault_circuit_interrupter It looks like it's mainly a North American thing, with their low utility voltage fo...
by coulomb
Sun Apr 17, 2022 6:05 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC)
Replies: 921
Views: 694778

Re: Troubleshooting and repair for On-board Charger (OBC)

On that picture it should be the pins 6 and 7 on the right side, which i reversed. Ah. That means that a pair of diodes would be placed across each of the two transformers' outputs. It's hard to say what this would have done; it certainly will have stressed the diodes, and possibly also the IGBTs d...
by coulomb
Mon Apr 04, 2022 8:16 pm
Forum: General / Main Owners Forum
Topic: My 2012 Won't Go Into Ready Mode
Replies: 3
Views: 346

Re: My 2012 Won't Go Into Ready Mode

Just because it's new doesn't mean it hasn't been ruined, unfortunately. Give it a really good charge first; 12.5 V under charge is not even close to a full charge. It might take over a day, depending on the size of your battery and the current rating of the charger. It may come good. If not, sorry,...
by coulomb
Thu Mar 31, 2022 6:26 am
Forum: General Technical Discussions
Topic: Under the Cover--an Inside Look at a 2018 On-Board Charger (OBC2)
Replies: 22
Views: 8093

Re: Under the Cover--an Inside Look at a 2018 On-Board Charger (OBC2)

Is there any way you can explain how to test the gate components for someone with a very basic knowledge of PCBs? It's a matter of testing the components that drive the gate. Usually, that's resistors, diodes, driver transistors, and chips. The resistors can often be measured directly with a multim...
by coulomb
Thu Mar 31, 2022 6:03 am
Forum: Batteries and Battery Management
Topic: Replace bad LEV50 cell with LEV40
Replies: 21
Views: 2306

Re: Replace bad LEV50 cell with LEV40

MickeyS70 wrote: Mon Mar 28, 2022 8:40 am By hand balancing you mean removing the cells and charge/discharge them externally to a voltage that the rest of them have?
Yes.
by coulomb
Mon Mar 28, 2022 5:45 am
Forum: Batteries and Battery Management
Topic: Replace bad LEV50 cell with LEV40
Replies: 21
Views: 2306

Re: Replace bad LEV50 cell with LEV40

- any potential quick fixes without changing modules? I think it might be worth hand balancing those two cells. But the question would be at what SoC? Perhaps 50% display [ edit: was real ] SoC would be best, for minimum difference at the top and at the bottom, both of which can reduce range. Edit:...

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