Search found 2924 matches

by jonescg
Fri, 24 Aug 2012, 02:16
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

This would be great if DC fuses weren't the size of beer cans http://forums.aeva.asn.au/smileys/smiley6.gif Which is better? Two half pack chargers or one full pack charger with plugs and sockets to spec? I'm drawing a scale map of where all this stuff has to go. You run out of room fast... Oh - goo...
by jonescg
Thu, 23 Aug 2012, 22:10
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

I have emailed Nancy Loo about the isolation, and recommended charging wiring diagrams for the split-pack idea. Her engineer was away, so I will have to wait. She assured me everything was isolated from the HV output. Sorry if things are getting confusing between projects here - I will be building t...
by jonescg
Thu, 23 Aug 2012, 21:08
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

It's just another failsafe really. I'm trying to come up with the most space efficient means to isolate the high voltage from the user under idle, charging and discharging conditions. Within reason of course - I'm not planning on developing an ECU for the race bike. Unless I really have to.
by jonescg
Thu, 23 Aug 2012, 20:59
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

The 6 pin plug would simply be to share the current across the two chargers. Whether or not this is a fancy HV rated plug or a bunch of Andersons, I don't know yet. But in the interest of safety I would need at least two contactors - one for the drive and one for charging. splitpackchargesystem.JPG
by jonescg
Thu, 23 Aug 2012, 20:47
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

Ratty might not be the best word, but yeah, having the charge receptacle on the battery pack not protrude would be good. I have a diagram of what I have in mind but photobucket seems to be chucking a spaz. I will upload my schematic once they solve their '324' error.
by jonescg
Thu, 23 Aug 2012, 17:48
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

I know, but as a one-off charge plug and socket arrangement for the race bike it's not so bad. I would only be putting 352.5 V DC through it at no more than 6 amps. If it can't handle that... Hmm.
by jonescg
Thu, 23 Aug 2012, 16:12
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

I was thinking of doing that (using the same plug for power as for charging) but I also want the added safety feature of not being able to access power from the pack unless 12V was fed into it, closing the main contactor. I would like the option of being able to charge without leaving the bike switc...
by jonescg
Thu, 23 Aug 2012, 05:47
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

Interesting ideas. I wanted a 4-pin plug on the race bike so it was impossible to only charge half the pack. I think for the car I won't have any trouble coming up with a solution since the chargers will be onboard. Even if I have to use a 32 A single phase. Although a big 32A three phase plug would...
by jonescg
Thu, 23 Aug 2012, 00:46
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

I paralleled three TC charge outputs for trackside charging of Voltron, but this was only at 117 V. Ideally I would put the outputs in series, but I don't think it's recommended, hence the split pack idea. OK, so would the power demands of two 2 kW chargers be OK for any one circuit? Charging in win...
by jonescg
Wed, 22 Aug 2012, 23:58
Forum: Batteries, charging, management and monitoring
Topic: Split pack battery charging...
Replies: 148
Views: 16910

Split pack battery charging...

Hi all, So I will be running with a high voltage pack in both the eCRX and the electric race bike. Both vehicles will use a maximum charge voltage of 705 volts. in the CRX: 170 cells at 4.15 V max in the race bike: 168 cells at 4.20 V max Now, most companies don't make single chargers capable of goi...
by jonescg
Wed, 22 Aug 2012, 22:07
Forum: For Sale/Wanted
Topic: "36 V" ebike battery SOLD
Replies: 4
Views: 343

"36 V" ebike battery SOLD

Done :)
by jonescg
Tue, 21 Aug 2012, 00:43
Forum: Members Machines
Topic: barnard's Toyota MR2 - now Mr240
Replies: 213
Views: 25646

barnard's Toyota MR2 - now Mr240

I learned the origins of the word recalcitrant: re - again, calcio - kick (Italian).

These cells keep on kicking? Kicking back more like it...
by jonescg
Mon, 20 Aug 2012, 04:03
Forum: For Sale/Wanted
Topic: "36 V" ebike battery SOLD
Replies: 4
Views: 343

"36 V" ebike battery SOLD

Sorry, forgot to mention that Image It's a 15 Ah pack.

10 cells in series, 3 in parallel. Charge at 42 volts, nominally about 37 V and it's spent at 35 V.
by jonescg
Mon, 20 Aug 2012, 02:08
Forum: For Sale/Wanted
Topic: "36 V" ebike battery SOLD
Replies: 4
Views: 343

"36 V" ebike battery SOLD

This was the RC-LiPo battery I built and tested before deciding to make my race bike battery pack using the same technique. I have put it through several 10 C discharges and 0.2 C recharges and they all stay nicely in balance. It has balance leads attached to each cell should you want to balance it ...
by jonescg
Sun, 19 Aug 2012, 06:20
Forum: Members Machines
Topic: barnard's Toyota MR2 - now Mr240
Replies: 213
Views: 25646

barnard's Toyota MR2 - now Mr240

I think a battery monitoring system which trims any high cell down to an acceptable level during and just after charging is a good idea. This is essentially 'balancing' but not for very long. It just stops any one cell from resting at an unacceptably high voltage. Coupled with regular tune-up balanc...
by jonescg
Sun, 19 Aug 2012, 03:09
Forum: Members Machines
Topic: jonescg's eCRX build thread
Replies: 42
Views: 10119

jonescg's eCRX build thread

That price is landed, GST and customs included. It could be less (I fecking hope it's less!) Life cycle is less important to me because I drive so infrequently. If we use a car, it's usually to travel a substantial distance (like up to 200 km). Any further, we're usually on the Blackbird (1100 cc sp...
by jonescg
Sat, 18 Aug 2012, 07:36
Forum: Members Machines
Topic: jonescg's eCRX build thread
Replies: 42
Views: 10119

jonescg's eCRX build thread

So for the electrification of the CRX, I plan on using the EiG Li(NiMnCo)O 2 20 Ah cells. Turns out they really only want to sell me the cells, not the packaging which is weird because I would have thought that's what they want. Anyway, I have devised my own termination system. I now know why their ...
by jonescg
Sat, 18 Aug 2012, 00:37
Forum: AEVA NSW Branch
Topic: AEVA National AGM, Sydney, 27th October
Replies: 5
Views: 1184

AEVA National AGM, Sydney, 27th October

Hi everyone,

The AEVA National Annual General Meeting will be held in Sydney on the 27th of October as part of the EV Festival.

I only discovered that the EV Festival has its own website:
http://www.evfestival.com.au/

Anyway, I hope to see you there!

Cheers,
Chris
by jonescg
Fri, 17 Aug 2012, 18:09
Forum: Members Machines
Topic: jonescg's eCRX build thread
Replies: 42
Views: 10119

jonescg's eCRX build thread

I am sourcing them from the supplier: http://www.eigbattery.com/eng/product/C020.pdf Matt, they are actually an improvement on LiMn, in that the cathode is Li(NiMnCo)O2. The Ni and Mn stabilise the cathode so you don't get CoO2 being reduced, generating reactive oxygen species. Minimum order of 1000...
by jonescg
Fri, 17 Aug 2012, 06:20
Forum: Members Machines
Topic: jonescg's eCRX build thread
Replies: 42
Views: 10119

jonescg's eCRX build thread

So I am almost ready to take the oil burner across the pits. It's currently unregistered and I figure since it will take a long time to save enough cash get it converted, it will be handy as a weekend runabout. But I got to thinking about weight distribution. This is a front wheel drive car, and the...
by jonescg
Thu, 16 Aug 2012, 20:39
Forum: Members Machines
Topic: barnard's Toyota MR2 - now Mr240
Replies: 213
Views: 25646

barnard's Toyota MR2 - now Mr240

The EV-Power BMS is great for monitoring, but not so good for balancing. This is usually because most chargers cut out when the charge current drops below half an amp or so, when really, for the balancing to occur properly the current needs to remain on at half an amp for another hour or so while th...
by jonescg
Thu, 16 Aug 2012, 04:49
Forum: The Lounge
Topic: Carbon Tax on Green Energy
Replies: 29
Views: 3413

Carbon Tax on Green Energy

So as an addendum to this Synergy Saga, we decided to cancel our 100% green power arrangement. They describe it as a genuinely useful means to increase renewable energy development and the like, but they later say we simply buy RECs and how they are produced or whether or not it's helping the state ...
by jonescg
Tue, 14 Aug 2012, 19:07
Forum: For Sale/Wanted
Topic: Parting out Voltron the Electric RG
Replies: 8
Views: 774

Parting out Voltron the Electric RG

Hi Everyone, Unfortunately I cannot afford to get Voltron the Electric RG back into working order as I need the funds for a better handling, faster bike for next year. I thought about getting it running again but no-one would want to race it, and the department of transport certainly wouldn't pass i...
by jonescg
Tue, 14 Aug 2012, 04:12
Forum: Members Machines
Topic: Picked up '90 capri roller for $0.00
Replies: 6
Views: 1330

Picked up '90 capri roller for $0.00

This thread is useless without pictures Image
by jonescg
Tue, 14 Aug 2012, 00:59
Forum: Members Machines
Topic: Ian Hooper's RX7 Conversion
Replies: 102
Views: 23118

Ian Hooper's RX7 Conversion

I too thought about doing the CRX conversion on a budget, but then I thought, as an ambassador to the EV movement, I really ought to put the best ingredients into the car rather than a compromise. It's a tough call though - spending >$50,000 on a conversion. I rest easier knowing that the $2500 car ...