New Battery Pack in My CuMoCo C124

4 posts / 0 new
Last post
PJD
PJD's picture
Offline
Last seen: 2 days 8 hours ago
Joined: Wednesday, November 22, 2006 - 05:44
Points: 1416
New Battery Pack in My CuMoCo C124

I just completed an installation of 24 new 60AH GBS cells in my 7 year old C124 and it is running fine. The old cells were still serviceable but power and range was suffering.

The cell replacement was bigger than the big job I thought it was going to be - between getting all the cells charged and balanced on the bench-top and shuffled onto the battery tray. Then there were the estimated 400 screw removal and replacements with those 4-screw cell terminals and BMS connections. At least GBS now uses Torx-head screws. I also rigged a much improved syatem of restraint straps for both the 12-cell rows. CuMoCo did not restrain the cells well at all against swelling and so most of the old cells were visibly bulging.

I had only one glitch - after the first ride with the new cells last week, bad weather kept it in the garage, then yesterday evening, I attempted a trip out to the pub, but the scooter would, on any amount of slope, go 2-3 meters then shut off, to be repeated when the throttle was returned to zero and twisted again. The light on the Kelly was green, so I figured that it was another case of the BCU over-reacting to a minor condition. Fortunately, I have the BCU Access software and hardware which can do an OBD-style scan, configure, or-flash the BCU**. So I was able to immediately diagnose it as a open battery pack temperature sensor circuit at the connector to the BCU - which I was able to fix.

Why John and Eric programmed all these ways to leave a rider stranded over the most trivial detected faults is something I will never figure out. Could you imagine owning a car that shuts down every time a CEL code is thrown?

And while the big front fairing piece was off the scooter, I put LED headlight lamps in it - 50% more light at 25% of the power consumption!

The only thing left is to figure something useful to do with the old cells. I'm thinking of using them to build a UPS for my house - I figure they still have enough capacity to keep the refrigerator and (now all LED) lighting going for two days, - or in winter, the gas furnace and refrigerator and lighting going for one day.

Anybody else out there with a CuMoCo scooter still running?

------------------------

**Only a few owners were able to get the BCU access and the BCU firmware before the "angel investors" of CuMoCo put a kibosh on it becasue they thought John Harding's programming, even just the compiled firmware code, was some kind of valuable intellectual property - which also went a long way to assure the failure of CuMoCO (and their investment).

LCJUTILA
Offline
Last seen: 18 hours 57 min ago
Joined: Monday, May 21, 2012 - 07:23
Points: 113
Re: New Battery Pack in My CuMoCo C124

My C-130 still works great!

LCJUTILA

PJD
PJD's picture
Offline
Last seen: 2 days 8 hours ago
Joined: Wednesday, November 22, 2006 - 05:44
Points: 1416
Re: New Battery Pack in My CuMoCo C124

You may be the only other owner of a CuMoCo Scooter still running!

LCJUTILA
Offline
Last seen: 18 hours 57 min ago
Joined: Monday, May 21, 2012 - 07:23
Points: 113
Re: New Battery Pack in My CuMoCo C124

I think what saved my bike is I had an early problem with the BCU and they sent me a new one.
They blamed the problem on the 12 vdc power converter getting too hot and frying the BCU.
I switched out a bunch of incandescent lights to LED to lessen the load and keep the BCU cooler.....Seemed to solve the problem.
I also do NOT keep the battery topped up.
If I fully charge the bike, it is right before I am going to ride it.
Then, after I knock off ten miles or so of charge I leave the bike in a slight state of discharge until I am going to ride it again. Only then do I top it up, if necessary.
At one point I was riding the bike 47 miles (both ways) to work, 94 total. I'd charge it up for the ride home while working.
I like the scooter but it was rather expensive.
Best of luck with yours!

LCJUTILA

Log in or register to post comments


Who's online

There are currently 0 users online.

Who's new

  • FloridaCAMCourses
  • manish_sharma
  • danieldevote
  • mcbooya
  • Grace

Customize This