Search found 1123 matches

by T1 Terry
Sat, 06 Aug 2011, 21:37
Forum: Batteries, charging, management and monitoring
Topic: BMS wire protection
Replies: 2
Views: 851

BMS wire protection

I have plans to run 1.85mmsq conductor cable from each of my LYP 180ah cells (2 X 90ah in parallel) to a convenient central point and and fit a terminal strip from there link the cell loggers using data cable. My plan is to connect a load across any 2 points on this terminal strip for the purpose of...
by T1 Terry
Wed, 03 Aug 2011, 10:47
Forum: Batteries, charging, management and monitoring
Topic: LFP users, who can measure cell's capacity?
Replies: 7
Views: 1478

LFP users, who can measure cell's capacity?

Hi Alex, Did you condition the cells with a 4v per cell charge as specified by Thundersky before you used them? I watch a LFP over view video by Jay Whitacre a professor at CaCarnegie Mellon University and in it he suggests that the initial high conditioning charge could be designed to put a light c...
by T1 Terry
Tue, 02 Aug 2011, 05:25
Forum: Batteries, charging, management and monitoring
Topic: LFP users, who can measure cell's capacity?
Replies: 7
Views: 1478

LFP users, who can measure cell's capacity?

If you read the TS data sheet carefully the 3,000 cycles is at a 0.5C charge and discharge rate to 80% DoD. If you have discharged or charged at a higher rate than that then the 3,000 cycle specification does not apply. The other thing to think about, does the specs actually say that you will have 8...
by T1 Terry
Wed, 20 Jul 2011, 04:18
Forum: Batteries, charging, management and monitoring
Topic: Li-Ion Battery-Higher Energy density than LiFePO4
Replies: 14
Views: 2423

Li-Ion Battery-Higher Energy density than LiFePO4

Cycle Performance     80% of initial capacity at 1000 cycles you would need a lot of them for an EV with a 10a discharge rate and a recharge rate limited to 6.5a, regen wold be limited. i wonder if the weight saving between to 2 chemicals would be lost because of the extra packaging. T1 Terry It is...
by T1 Terry
Wed, 20 Jul 2011, 00:17
Forum: Batteries, charging, management and monitoring
Topic: Li-Ion Battery-Higher Energy density than LiFePO4
Replies: 14
Views: 2423

Li-Ion Battery-Higher Energy density than LiFePO4

Cycle Performance     80% of initial capacity at 1000 cycles
you would need a lot of them for an EV with a 10a discharge rate and a recharge rate limited to 6.5a, regen wold be limited. i wonder if the weight saving between to 2 chemicals would be lost because of the extra packaging.

T1 Terry
by T1 Terry
Tue, 19 Jul 2011, 00:57
Forum: Batteries, charging, management and monitoring
Topic: What paste?
Replies: 12
Views: 3054

What paste?

I tried TLE, no luck, tried J Car and they came up with a Chemtools product called Carbon grease R006, http://www.jaycar.com.au/productView.asp?ID=NA1034&keywords=carbon+grease&form=KEYWORD, but after reading the description on the website it appears more for switch lubrication. I guess it's back to...
by T1 Terry
Sun, 17 Jul 2011, 21:35
Forum: Batteries, charging, management and monitoring
Topic: What paste?
Replies: 12
Views: 3054

What paste?

Thanks everyone for your help, I will take the list with me to TLE in the morning and see what I come up with. The tip about the local energy authority using a suitable compound could be an interesting one to follow up Image

T1 Terry
by T1 Terry
Sat, 16 Jul 2011, 07:19
Forum: Batteries, charging, management and monitoring
Topic: What paste?
Replies: 12
Views: 3054

What paste?

Often there is a paste mentioned regarding assembling battery straps to link cells together. What is the paste and where do you get it?

T1 Terry
by T1 Terry
Tue, 12 Jul 2011, 03:36
Forum: AEVA NSW Branch
Topic: Tuesday 12th July - Terrey Hills Tavern
Replies: 3
Views: 1427

Tuesday 12th July - Terrey Hills Tavern

I was keen on trying to make it to this one but it seems the gods are against me, or at least my own stupidity. It appears I had 4 pieces of metal imbedded in my right eye as a result of grinding a battery frame on Saturday afternoon. eye was a bit sore but didn't worry about it. Sunday morning it w...
by T1 Terry
Sun, 03 Jul 2011, 03:09
Forum: Technical and conversion discussion
Topic: Toyota RAV4 - EV ? Any Thoughts ?
Replies: 7
Views: 2168

Toyota RAV4 - EV ? Any Thoughts ?

I think the idea of a vehicle manufacturer teaming up with an electric vehicle manufacturer is the way of the future. Too steep a learning curve for a manufacturer who's whole strategy was based around an ICE but an electric vehicle manufacturer with access to body design engineers and fabricators c...
by T1 Terry
Mon, 20 Jun 2011, 18:07
Forum: Batteries, charging, management and monitoring
Topic: commisioning charge of TS & WB cells
Replies: 8
Views: 1368

commisioning charge of TS & WB cells

Well, the battery box is built and the batteries have been commission/condition charged. This is only a little pack for a motorhome house battery bank, sort of a learning program before starting on the 64 cells for my project. I'm doing mine backwards to every one else by the look of it, I've got th...
by T1 Terry
Tue, 14 Jun 2011, 04:42
Forum: Batteries, charging, management and monitoring
Topic: commisioning charge of TS & WB cells
Replies: 8
Views: 1368

commisioning charge of TS & WB cells

Thanks heaps,
I thought it must have been heaps more than that, think my frame is a tad over built Image Guess i'll have to use lock nuts to stop it coming undone now

T1 Terry
by T1 Terry
Mon, 13 Jun 2011, 13:33
Forum: Batteries, charging, management and monitoring
Topic: commisioning charge of TS & WB cells
Replies: 8
Views: 1368

commisioning charge of TS & WB cells

Another question, not sure if it should have been a new topic but if you think I'd get a better response then I will start a new one. What is the tension requirement for clamping the battery packs? I have made a battery rack (massive over build) with 50mm clamping straps to go accross the wide face ...
by T1 Terry
Sat, 11 Jun 2011, 18:12
Forum: Batteries, charging, management and monitoring
Topic: commisioning charge of TS & WB cells
Replies: 8
Views: 1368

commisioning charge of TS & WB cells

Thank, that makes a little more sense, sort of, 0.9amps is still 72 amps for 80 cells and there is still the issue of them all accepting charge evenly. The reason I was looking at charging them all together in parallel was to ensure they were all evenly top balanced. I feel this is a lot to do with ...
by T1 Terry
Sat, 11 Jun 2011, 16:04
Forum: Batteries, charging, management and monitoring
Topic: commisioning charge of TS & WB cells
Replies: 8
Views: 1368

commisioning charge of TS & WB cells

I posted this question on the DIY forum as well, just to get a wider range of views, some seem to be a bit on the outer edges over there. I have just received my 80 x 90ah Thundersky cells. Some are the old stock TS LFP90AHA and the rest WB LYP90AHA. Two different conditioning charge rates, the pape...
by T1 Terry
Mon, 18 Apr 2011, 14:01
Forum: General EV Discussion
Topic: "Heavy" Electric Vehicles
Replies: 10
Views: 2440

"Heavy" Electric Vehicles

if you are in the game of raping and pillaging the environment T1 Terry Obviously as a consumer you approve of this otherwise you'd have returned all your possessions for recycling and would now be living off the grid save for one incandescent light made of native copper panned for by virgins from ...
by T1 Terry
Sun, 17 Apr 2011, 21:38
Forum: Batteries, charging, management and monitoring
Topic: Charging 20 Thunderskys
Replies: 9
Views: 1460

Charging 20 Thunderskys

The though train was to have a cut out/in circuit as part of the DC/DC boards so when 3.5 volts was reached the DC/DC cut out and didn't cut back in until the cell dropped to 2.5 or maybe 2.8v. I was thinking a basic BMS unit like the one Rod Dikes is marketing could possibly be adapted for the job....
by T1 Terry
Sun, 17 Apr 2011, 18:22
Forum: General EV Discussion
Topic: "Heavy" Electric Vehicles
Replies: 10
Views: 2440

"Heavy" Electric Vehicles

I don't think there is any incentive for mining to even consider such a move. Diesel for them is tax free, fast to recharge an empty tank is easy and if you are in the game of raping and pillaging the environment what's a bit of air pollution going to matter.

T1 Terry
by T1 Terry
Sun, 17 Apr 2011, 18:16
Forum: Batteries, charging, management and monitoring
Topic: Charging 20 Thunderskys
Replies: 9
Views: 1460

Charging 20 Thunderskys

The thought I had was to tap off the pack at 48v intervals and power the single cell boards from there while limiting the total pack charge rate to 3.3v per cell. this way each cell gets top balanced but the chance of a single cell being pushed over the 4.0v threshold is reduced.

T1 Terry
by T1 Terry
Sat, 16 Apr 2011, 15:04
Forum: Batteries, charging, management and monitoring
Topic: Charging 20 Thunderskys
Replies: 9
Views: 1460

Charging 20 Thunderskys

with the cell resistance being so low will the cells accept charge even if the input voltage was only 0.1v higher than terminal voltage? I.E. If the operating voltage is 3.2v per cell will they recharge at 3.3v per cell? Would the charge rate in amps be the same as it would if the charge voltage was...
by T1 Terry
Wed, 13 Apr 2011, 03:21
Forum: Members Machines
Topic: seligtype3 1969 Volkswagen Type 3
Replies: 194
Views: 45010

seligtype3 1969 Volkswagen Type 3

Go to the wreckers and pick up an old crank that has a unrepairable spun bearing damage, chop the flywheel end off and machine it to suit the taper lock. That way you can buy an off the shelf flywheel to suit the crank bolt pattern. VW type 1 engines have a big bolt that threads into the centre of ...
by T1 Terry
Thu, 07 Apr 2011, 14:23
Forum: Members Machines
Topic: seligtype3 1969 Volkswagen Type 3
Replies: 194
Views: 45010

seligtype3 1969 Volkswagen Type 3

A resto and an electric conversion, I'm enjoying watching the progress. Looking good, there must have been a moment of panic when you took to the clock and cut it up, they are getting to be collectors items now. Have you posted any of your build on any of the VW forums, I'm sure there would be a gen...
by T1 Terry
Wed, 06 Apr 2011, 22:32
Forum: For Sale/Wanted
Topic: For Sale - Electrolux - '92 Hilux Extracab
Replies: 28
Views: 3244

For Sale - Electrolux - '92 Hilux Extracab

Sort of sad to see it's gone but it does allow you to move on to another project. The link to the final post doesn't work for me but the E30 one does. looks like an interesting project. Can you put up a link to Woddy's AC spread sheet you mention in your blog?

T1 Terry
by T1 Terry
Sun, 03 Apr 2011, 20:39
Forum: Technical and conversion discussion
Topic: synthetic transmission oil-educate me!
Replies: 22
Views: 5733

synthetic transmission oil-educate me!

I will contact the mate with the bus that is converted to a motorhome regarding the name of the synthetic oil he is using in his truck size gearbox. That oil is about the same consistency as auto trans fluid. From there you will have the contact info to talk to the oil company engineers directly and...