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by coulomb
Sat Mar 07, 2020 6:06 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 476
Views: 113784

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

kiev wrote: this post has a picture of a bare board and the fuse is soldered next to the resistor R104.

This post shows it is F102 (even clearer in the lower photo).
by coulomb
Sat Mar 07, 2020 5:59 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 476
Views: 113784

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

The DC/DC converter can draw more than 10 amps though when the car is being driven I presume ? I'd say a max of about 4 A. Say 14 V x 80 A + losses ≅ 1200 W; 1200 W / 360 V = 3.3 A. Otherwise why make the fuses more than double the current drawn - which actually peaks at less than 9 amps while char...
by coulomb
Mon Dec 16, 2019 5:36 am
Forum: Other Electric Vehicles
Topic: Older Leaf driving impression (good value)
Replies: 8
Views: 1037

Re: Older Leaf driving impression (good value)

kiev wrote: The charging status can be seen from quite a distance--

Yes. I park my Leaf in a carport just outside my bedroom, and can easily see the charge status from my bedroom or the adjacent office. That's really handy for me.
by coulomb
Fri Dec 13, 2019 8:14 pm
Forum: Other Electric Vehicles
Topic: Older Leaf driving impression (good value)
Replies: 8
Views: 1037

Re: Older Leaf driving impression (good value)

Leaf question: are those bars on the Leaf display a good enough indicator of capacity, or should one get Leaf Spy? The bars are pretty good; just don't put too much credence on the Guess-O-meter (distance to empty figure). Later Leafs have an actual SOC%, I wish mine had that. LeafSpy is good for g...
by coulomb
Thu Dec 12, 2019 7:07 pm
Forum: Other Electric Vehicles
Topic: Older Leaf driving impression (good value)
Replies: 8
Views: 1037

Re: Older Leaf driving impression (good value)

The J1772 port does not respond to trigger press to shut off the EVVSE, have to just pull out (scares me) You might have gotten that from me; I was wrong. They do respond to the trigger press; it's just that nothing visible happens. If you check the AC current or charge current with LeafSpy, it doe...
by coulomb
Wed Dec 04, 2019 7:28 pm
Forum: Batteries and Battery Management
Topic: Hack DC charging - limit to 30kW
Replies: 15
Views: 2429

Re: Hack DC charging - limit to 30kW

Actually doing that though would require an ECU modder who was willing to reverse engineer the firmware in the BMU - not an easy task I would think! I have tried to do that. I have had no success getting to the BMS master firmware; I've had limited success reverse engineering the CMU firmware. I'm ...
by coulomb
Sat Nov 09, 2019 8:40 pm
Forum: General Technical Discussions
Topic: MCU 20A 450VDC fuse investigation
Replies: 31
Views: 8565

Re: Fuse Internal Element Views

On the PEC drawing there is a call-out for item 7, a small dot or blob of a tin alloy (solder?), which can be seen below. ... so this must be some secret sauce for making fuses. From the end of this page : "Another slow blow fuse is the "M" type (named for the inventor). This has a s...
by coulomb
Wed Nov 06, 2019 3:36 am
Forum: Batteries and Battery Management
Topic: CMU board notes, eprom, cell numbering
Replies: 16
Views: 3690

Re: eeprom readout for CMU Board

i noticed some possible ascii text string buried in here. It doesn't look like a VIN, but looks something like a mitsubishi part number, " 9? 94 A9 97 5? Z?". [For example, the label on BMU has part number 9499B116, and on the 8-cell CMU has 9499A794 with a serial number.] I note that if ...
by coulomb
Fri Nov 01, 2019 9:41 pm
Forum: Batteries and Battery Management
Topic: On-Board Charger (OBC) Warranty Extended!
Replies: 33
Views: 10988

Re: On-Board Charger (OBC) Warranty Extended!

pbui19 wrote:wonder if my 2014 iMiev is covered.

No idea.

But if there IS a cutoff date, that might tell us that they (think they) have fixed the problem at a certain point.
by coulomb
Tue Oct 08, 2019 2:55 am
Forum: EVSE (Charging Stations)
Topic: ChargePoint Charging Question
Replies: 102
Views: 18429

Re: ChargePoint Charging Question

Below is Chargepoint's analysis... Brilliant! It's more or less as we suspected; the car does something unusual but (as far as I can tell) perfectly legitimate, and the EVSE makes an invalid assumption (must be ramping down), and doesn't test that assumption later (is it drawing more current now? O...

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