Search found 56 matches

by skooler
Sun Aug 17, 2014 8:52 pm
Forum: Electric Motor Bikes
Topic: Elecscoot E4 scooter with LiFePO4 cells
Replies: 15
Views: 13701

Re: Elecscoot E4 scooter with LiFePO4 cells

Hi All, I purchased the scooter from Colin and thought I'd continue this thread with its repair. It had 15 miles since new (2012). Diagnosis The reason for this appears to be a faulty battery pack. We found that the pack was not wired correctly in series and there was one connection where the positi...
by skooler
Thu Aug 14, 2014 8:14 am
Forum: Electric Motor Bikes
Topic: Elecscoot E4 scooter with LiFePO4 cells
Replies: 15
Views: 13701

Re: Elecscoot E4 scooter with LiFePO4 cells

*confused* ... I'm near Birmingham, ... given ... your remote location ... Birmingham is the least remote city in England. Maybe a good deal after all? Ah.... I must have got confused with another thread.... I had Elgin in my head for some reason! Colin, I'll happily take it if the price is right. ...
by skooler
Wed Aug 13, 2014 1:13 pm
Forum: Electric Motor Bikes
Topic: Elecscoot E4 scooter with LiFePO4 cells
Replies: 15
Views: 13701

Re: Elecscoot E4 scooter with LiFePO4 cells

Hi Colin,

My company might be interested in taking it off your hands but given the battery is likely duff and your remote location we likely can't offer much.

Send an email to mike at indra.co.uk and we can discuss.

Cheers,

Mike
by skooler
Thu Jul 31, 2014 9:09 am
Forum: All things battery related
Topic: Alittle advice with charging final phase with lifepo4
Replies: 13
Views: 14250

Re: Alittle advice with charging final phase with lifepo4

Hi, I have got a 76 cell lifepo4 pack that i have been quietly tinkering with for optimal set up. I have modified the zivan charger with help from Dave at electrofit zapi which required a 20k turnpot to be fitted in place of a 2k on the voltage set point which gave more voltage adjustment, plus the...
by skooler
Sun Jul 20, 2014 7:34 pm
Forum: All things battery related
Topic: Is a BMS actually necessary on LifePo4 cells.
Replies: 6
Views: 15870

Re: Is a BMS actually necessary on LifePo4 cells.

Grumpy, good explanation. I agree with everything you say apart from the cut off voltages but that's down to your own risk appetite :) Thought I would add a bit more on the topic of battery monitoring systems. Typically, this will be a method of sensing voltage attached to each cell. Usually a cable...
by skooler
Sun Jul 20, 2014 1:45 pm
Forum: All things battery related
Topic: Is a BMS actually necessary on LifePo4 cells.
Replies: 6
Views: 15870

Re: Is a BMS actually necessary on LifePo4 cells.

Hi All Yesterday I was shown a vehicle with loads of Lifepo4 cells and no BMS. Apparently all the cells were bottom balanced on install and then pack charged until the lowest capacity cell reached 3.7v at which point the pack voltage was noted and used as a cut-off value for the charger. Clearly wh...
by skooler
Sat Jul 19, 2014 7:27 am
Forum: All things battery related
Topic: 200 mile range Leaf anyone?
Replies: 11
Views: 12961

Re: 200 mile range Leaf anyone?

Oh! My bad, you are right there Rory. Leafs (etc.) have them doubled up inside the cans. The discharge voltage rates across differing cell chemistries need to be visualized. Match a pair of discharge graphs of same capacity and you will see why. :) It's not the discharge curves that matter - Its th...
by skooler
Fri Jun 20, 2014 8:26 am
Forum: All things battery related
Topic: AXIAM CITY BATTERIES
Replies: 4
Views: 7221

Re: AXIAM CITY BATTERIES

Thankyou both for replying. Yes the car is lead acid at present. I dont have the money to upgrade to lithium. Lucas LSC85-12v look to be a option. I see some of the members have used them on other vehicles. 85a/h deepcycle and about the right size. Does anyone have any information about them or sim...
by skooler
Wed Jun 18, 2014 1:18 pm
Forum: All things battery related
Topic: AXIAM CITY BATTERIES
Replies: 4
Views: 7221

Re: AXIAM CITY BATTERIES

Does anyone know where I can get a set of batteries at a reasonable price for A mega city car. Have had the charger replaced but It seems the car needs new batteries too! I reckon i was had with this car but if I can not get some batteries for a reasonable price I will bin the car. Pity though as i...

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